CCNA 4 – INTRODUCING ROUTING AND SWITCHING IN THE ENTERPRISE
FINAL 1 EXAM
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What are two main components of data confidentiality?
 checksum
 digital certificates
 encapsulation
 encryption
 hashing
Which network component has the primary function of detecting and logging attacks made
against the network?
 Cisco Security Agent
 antivirus software scanner
 intrusion detection system
 intrusion prevention system
Refer to the exhibit. A network administrator has issued the commands that are shown on
Router1 and Router2. A later review of the routing tables reveals that neither router is
learning the LAN network of the neighbor router. What is most likely the problem with the
RIPng configuration?
 The serial interfaces are in different subnets.
 The RIPng process is not enabled on interfaces.
 The RIPng network command is not configured.
 The RIPng processes do not match between Router1 and Router2.
Which three guidelines would help contribute to creating a strong password policy?
 Once a good password is created, do not change it.
 Deliberately misspell words when creating passwords.
 Create passwords that are at least 8 characters in length.
 Use combinations of upper case, lower case, and special characters.
 Write passwords in locations that can be easily retrieved to avoid being locked out.
Use long words found in the dictionary to make passwords that are easy to remember.
Refer to the exhibit. The link between the CTRL and BR_1 routers is configured as shown in the
exhibit. Why are the routers unable to establish a PPP session?
 The clock rate must be 56000.
 The usernames are misconfigured.
 The IP addresses are on different subnets.
 The clock rate is configured on the wrong end of the link.
 The CHAP passwords must be different on the two routers.
 Interface serial 0/0/0 on CTRL must connect to interface serial 0/0/1 on BR_1.
Refer to the exhibit. Headquarters is connected through the Internet to branch office A and
branch office B. Which WAN technology would be best suited to provide secure connectivity
between headquarters and both branch offices?
 ATM
 VPN
 ISDN
 Frame Relay
 broadband DSL
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Which combination of authentication and Layer 2 protocol should be used to establish a link
between a Cisco and a non-Cisco router without sending authentication information in plain
text?
 CHAP and HDLC
 CHAP and PPP
 PAP and HDLC
 PAP and PPP
A technician is talking to a colleague at a rival company and comparing DSL transfer rates
between the two companies. Both companies are in the same city, use the same service
provider, and have the same rate/service plan. What is the explanation for why company 1
reports higher download speeds than company 2 reports?
 Company 2 downloads larger files than company 1 downloads.
 Company 2 must share the connection to the DSLAM with more clients than company
1 shares.
 Company 1 is closer to the service provider than is company 2.
 Company 1 has a lower volume of POTS traffic than company 2 has.
Refer to the exhibit. The network administrator creates a standard access control list to
prohibit traffic from the 192.168.1.0/24 network from reaching the Internet. The access list
must still permit the 192.168.1.0/24 network access to the 192.168.2.0 network. On which
router interface and in which direction should the access control list be applied?
 interface Fa0/0, inbound
 interface Fa0/0, outbound
 interface S0/0/0, inbound
 interface S0/0/0, outbound
An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The
administrator receives an error message when trying to enter the IPv4 routes into RIPng. What
is the cause of the problem?
 When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are overwritten in favor of the newer technology.
 Incorrect IPv4 addresses are entered on the router interfaces.
 RIPng is incompatible with dual-stack technology.
 IPv4 is incompatible with RIPng.
Refer to the exhibit. A network administrator is trying to backup the IOS software on R1 to the
TFTP server. He receives the error message that is shown in the exhibit, and cannot ping the
TFTP server from R1. What is an action that can help to isolate this problem?
 Use correct source file name in the command.
 Verify that the TFTP server software is running.
 Make sure that there is enough room on the TFTP server for the backup.
 Check that R1 has a route to the network where the TFTP server resides.
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Refer to the exhibit. Partial results of the show access-lists and show ip interface FastEthernet
0/1 commands for router Router1 are shown. There are no other ACLs in effect. Host A is
unable to telnet to host B. Which action will correct the problem but still restrict other traffic
between the two networks?
 Apply the ACL in the inbound direction.
 Apply the ACL on the FastEthernet 0/0 interface.
 Reverse the order of the TCP protocol statements in the ACL.
 Modify the second entry in the list to permit tcp host 172.16.10.10 any eq telnet .
What component of VPN technology combines message text with a key to make the message
unreadable by unauthorized receivers?
 message hash
 user password
 RSA signature
 encryption algorithm
Which variable is permitted or denied by a standard access control list?
 protocol type
 source IP address
 source MAC address
 destination IP address
 destination MAC address
Refer to the exhibit. An ACL called Managers already exists on this router. What happens if the
network administrator issues the commands as shown in the exhibit?
 The new ACL overwrites the existing ACL.
 The network administrator will receive an error message.
 The existing ACL is modified to include the new command.
 A second Managers ACL is created that contains only the new command.
Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and
R3 have not received any RIP routing updates. What will fix the issue?
 Enable RIP authentication on R2.
 Issue the ip directed-broadcast command on R2.
 Change the subnet masks to 10.11.12.0/8 and 172.16.40.0/16 on R2.
 Enable CDP on R2 so that the other routers will receive routing updates.
What name is given to the location where a customer network interfaces with a network that
is owned by another organization?
 CPE
 DCE
 local loop
 demarcation point
Refer to the exhibit. What is placed in the address field in the header of a frame that will travel
from the Orlando router to the DC router?
 DLCI 123
 DLCI 321
 10.10.10.25
 10.10.10.26
 MAC address of the DC router
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Refer to the exhibit. Communication between two peers has failed. Based on the output that
is shown, what is the most likely cause?
 interface reset
 unplugged cable
 improper LMI type
 PPP negotiation failure
What will be the result of adding the command ip dhcp excluded-address 10.10.4.1 10.10.4.5
to the configuration of a local router that has been configured as a DHCP server?
 Traffic that is destined for 10.10.4.1 and 10.10.4.5 will be dropped by the router.
 Traffic will not be routed from clients with addresses between 10.10.4.1 and 10.10.4.5.
 The DHCP server will not issue the addresses ranging from 10.10.4.1 to 10.10.4.5.
 The router will ignore all traffic that comes from the DHCP servers with addresses
10.10.4.1 and 10.10.4.5.
What functionality do access control lists provide when implementing dynamic NAT on a Cisco
router?
 which addresses are allowed to be accessed from the inside network
 which addresses are allowed out of the router
 which addresses are assigned to a NAT pool
 which addresses are to be translated
Which statement about a VPN is true?
 VPN link establishment and maintenance is provided by LCP.
 DLCI addresses are used to identify each end of the VPN tunnel.
 VPNs use virtual Layer 3 connections that are routed through the Internet.
 Only IP packets can be encapsulated by a VPN for tunneling through the Internet.
Refer to the exhibit. Results of the show vlan and show vtp status commands for switches S1
and S2 are displayed in the exhibit. VLAN 11 was created on S1. Why is VLAN 11 missing from
S2?
 There is a Layer 2 loop.
 The VTP domain names do not match.
 Only one switch can be in server mode.
 S2 has a higher spanning-tree priority for VLAN 11 than S1 does.
An administrator is unable to receive e-mail. While troubleshooting the problem, the
administrator is able to ping the local mail server IP address successfully from a remote
network and can also successfully ping using the mail server name. At which layer of the OSI
model is the problem most likely to be found?
 physical layer
 network layer
 data link layer
 application layer
Which data link layer encapsulation protocol is used by default for serial connections between
two Cisco routers?
 ATM
 Frame Relay
 HDLC
 PPP
 SDLC
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A network administrator has changed the VLAN configurations on his network switches over
the past weekend. How can the administrator determine if the additions and changes
improved performance and availability on the company intranet?
 Conduct a performance test and compare with the baseline that was established
previously.
 Interview departmental secretaries and determine if they think load time for web
pages has improved.
 Determine performance on the intranet by monitoring load times of company web
pages from remote sites.
 Compare the hit counts on the company web server for the current week to the values
that were recorded in previous weeks.
Which statement accurately describes a role that is played in establishing a WAN connection?
 ISDN and ATM are circuit-switched technologies that are used to establish on demand
a path through the service provider network.
 Data link layer protocols like PPP and HDLC define how data is encapsulated for
transmission across a WAN link.
 A packet-switching network establishes a dedicated circuit between nodes for the
duration of the communication session.
 Frame Relay switches are normally considered to be customer premises equipment
(CPE) and are maintained by local administrators.
Refer to the exhibit. What is the meaning of the term dynamic in the output of the command?
 The bandwidth capability of the interface increases and decreases automatically based
on BECNs.
 The Serial0/0/1 interface acquired 172.16.3.1 from a DHCP server.
 The mapping between DLCI 100 and 172.16.3.1 was learned through Inverse ARP.
 DLCI 100 will automatically adapt to changes in the Frame Relay cloud.
What is an accurate description of CHAP when used with PPP on a serial connection between
two routers?
 A username and password are sent to the peer router, which replies with an accept or
reject message.
 A username and password are sent to the peer router. If these match the configuration
in the peer, the peer in turn provides a username and password to the initiating router.
 A challenge message is sent to the peer router, which responds with its username
and a calculated value based on a shared secret. This value is then compared by the
challenger to its own calculations.
 An encrypted password is sent to the peer router, which decrypts it and compares it to
a shared secret. If the decrypted passwords match, the peer sends the encrypted
password back to the initiating router.
Which technology is used to dynamically map next hop, network layer addresses to virtual
circuits in a Frame Relay network?
 Inverse ARP
 LMI
 DLCI
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Refer to the exhibit. A network administrator is trying to connect R1 remotely to make
configuration changes. Based on the exhibited command output, what will be the result when
attempting to connect to R1?
 failure to connect due to Telnet not being enabled
 failure to connect due to incomplete configuration for Telnet
 a successful connection and ability to make configuration changes
 a successful connection but inability to make configuration changes because of the
absence of an enable secret password
A DHCP server is configured with a block of excluded addresses. What two devices would be
assigned static addresses from the excluded address range? (Choose two.)
 a protocol analyzer
 DNS server for the network
 network printer that is used by many different users
 a laptop that will get a different address each time it boots up
Refer to the exhibit. The corporate network that is shown has been assigned network
172.16.128.0/19 for use at branch office LANs. If VLSM is used, what mask should be used for
addressing hosts at Branch4 with minimal waste from unused addresses?
 /19
 /20
 /21
 /22
 /23
 /24
Compared with IDS systems, what can IPS systems do to provide further protection of
computer systems?
 detect potential attacks
 stop the detected attack from executing
 update OS patches for computer systems
 scan computer systems for viruses and spyware
A company has its headquarters office in Dallas and five branch offices located in New York,
Chicago, Los Angeles, Seattle, and Atlanta. WAN links are used for communications among
offices in six sites. In planning the WAN links, the network designer is given two requirements:
(1) minimize cost and (2) provide a certain level of WAN link reliability with redundant links.
Which topology should the network designer recommend?
 star
 full mesh
 hierarchical
 partial mesh
Refer to the exhibit. Every time the administrator reboots this router, the boot process ends in
setup mode. What is a possible problem?
 There is insufficient RAM for the IOS to load on this router.
 A password recovery process should be done on this router.
 The bootstrap version and the version of the IOS are different.
 The IOS image is damaged and must be reloaded using tftpdnld.
 The configuration register is set to ignore the startup configuration.
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An administrator issues the command show interfaces s0/1/0 on a router that is configured for
Frame Relay. Which console output may indicate an LMI mismatch?
 Serial0/1/0 is administratively down
 Serial0/1/0 is up, line protocol is up
 Serial0/1/0 is up, line protocol is down
 Serial0/1/0 is down, line protocol is down
Refer to the exhibit. Users who are connected to R1 report that they are unable to establish
connectivity to the users who are connected to router R2. A network administrator tests the
link with the debug ppp authentication command. Based on the output shown, which
statement correctly defines the problem on the link?
 R1 uses PAP as a method of authentication, and R2 uses CHAP.
 R1 uses CHAP as a method of authentication, and R2 uses PAP.
 R1 uses an incorrect user name or password for CHAP authentication.
 R2 uses an incorrect user name or password for PAP authentication.
Which IP address and wildcard mask combination can be used in an ACL statement to match
the 172.16.0.0/30 network?
 172.16.0.0 0.0.0.1
 172.16.0.0 0.0.0.3
 172.16.0.0 0.0.0.7
 172.16.0.0 255.255.255.252
A company is looking for a WAN solution to connect its headquarters site to four remote sites.
What are two advantages that dedicated leased lines provide compared to a shared Frame
Relay solution? (Choose two.)
 reduced jitter
 reduced costs
 reduced latency
 the ability to burst above guaranteed bandwidth
 the ability to borrow unused bandwidth from the leased lines of other customers
Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A
has sent a packet to the web server. What is the destination IP address of the return packet
from the web server?
 10.1.1.2:1234
 172.30.20.1:1234
 172.30.20.1:3333
 192.168.1.2:80
What function does LCP perform in the establishment of a PPP session?
 LCP brings the network layer protocols up and down.
 It carries packets from several network layer protocols.
 It encapsulates and negotiates options for IP and IPX.
 It negotiates and sets up control options on the WAN data link.
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An employee of XYZ corporation will begin working from home. The employee has a choice of
DSL or cable technology for WAN connectivity. Which connectivity characteristic is accurately
described?
 Cable transfer rates are dependent on the length of the local loop.
 DSL provides a high-speed connection over existing copper phone wires.
 DSL download speeds are affected by high usage in the area.
 DSL service shares the same frequency range as voice calls.
 Cable connectivity usually requires new fiber installed for the local loop.
Which option represents a best practice for applying ACLs?
 Named ACLs are less efficient than numbered ACLs.
 Standard ACLs should be applied inside the core layer.
 ACLs applied to outbound interfaces use fewer router resources.
 Extended ACLs should be applied closest to the source that is specified by the ACL.
While troubleshooting a problem with an e-mail server, an administrator observes that the
switch port used by the server shows “up, line protocol up”. The administrator cannot ping the
server. At which layer of the OSI model is the problem most likely to be found?
 application layer
 network layer
 data link layer
 physical layer
46. Which two configurations must be completed before an RSA key can be generated on a
router? (Choose two.)
 a hostname
 a domain name
 the SSH version
 the SSH timeouts
 local authentication on the VTY lines
What type of ACL can be used to force a user to authenticate to the router before accessing a
network?
 standard
 dynamic
 reflexive
 time-based
What is the result when the command security passwords min-length 8 is entered into a
router?
 All new passwords are required to be a minimum of 8 characters in length.
 All current passwords are now required to be a minimum of 8 characters in length.
 Enable passwords must be at least 8 characters but line passwords are unaffected.
 Nothing will happen until the command service password-encryption is entered. Then
all future passwords must have a minimum of 8 characters.
Because of a remote-procedure call failure, a user is unable to access an NFS server. At what
layer of the TCP/IP model does this problem occur?
 network layer
 data link layer
 physical layer
 application layer
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What is the result when the command permit tcp 10.25.132.0 0.0.0.255 any eq smtp is added
to a named access control list and applied on the inbound interface of a router?
 TCP traffic with a destination to the 10.25.132.0/24 is permitted.
 Only Telnet traffic is permitted to the 10.24.132.0/24 network
 Ttraffic from 10.25.132.0/24 is permitted to anywhere on using any port.
 Traffic using port 25 from the 10.25.132.0/24 is permitted to all destinations.
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FINAL 2 EXAM
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A small bookstore would like to offer wireless connectivity for customers with laptops. Which
wireless components or devices will provide connectivity to the customers with the least
possible cost to the bookstore?
 standalone access points
 wireless LAN controllers
 standalone lightweight access points
 lightweight access point and wireless LAN controller
What can be broadcast over the wireless network to help a user connect to the network and
use wireless services?
 SSID
 WEP keys
 VLAN parameters
 WPA encryption keys
 VPN authentication information
A company has an IT staff that is not highly trained. What two features or technologies must
the network designer identify as training needs in order for the staff to understand the basic
operation of VPNs? (Choose two.)
 access control lists
 encryption algorithms
 Frame Relay configuration
 QoS operation
 tunneling protocols
 VLAN configuration
A large company plans to add several servers and requires that the servers be reachable
directly from the Internet. Which action will help the company accomplish this goal?
 Assign to each server a static internal IP address that is mapped statically to a
public IP address.
 Place all servers in their own Class C private subnet.
 Provide a private address to each server using DHCP.
 Assign addresses from a pool of public Class B addresses using DHCP.
Which technical requirement is satisfied when providing QoS for delay sensitive applications?
 availability
 manageability
 scalability
 security
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During a review of the proposed bill of materials, an account manager of the network solution
company realizes that the systems engineer included a switch with lower cost and reduced
capabilities for the access layer than was originally specified by the network designer. When
questioned, the systems engineer responds that the switches specified by the designer cannot
be purchased within the budget limitations of the customer. Which action should the account
manager take?




Inform the customer that the project budget must be increased.
Inform the customer that the project cannot be completed given the unreasonable
budget constraints.
Communicate any risks that are associated with the equipment substitution and
obtain customer approval to proceed.
Because the customer is probably aware that the budget limitations will require
lower cost, less capable equipment, the account manager should do nothing.
7
Which protocol is enabled by default to dynamically discover and eliminate Layer 2 loops that are
created by redundant links between switches?
 CDP
 DTP
 STP
 VTP
8
Which statement describes the use of a network baseline?
 It creates a high level logical network diagram.
 It provides a point of reference for future network evaluations.
 It allows precise identification of the original location of network equipment.
 It should be established as soon as a problem is detected on the network.
What information does an administrator require before saving the running configuration from
a router to a TFTP server?
 router IP address and the name of the configuration file in NVRAM
 TFTP server IP address and the size of the configuration file in RAM
 TFTP server IP address and the name of the configuration file that will be saved
 router IP address, size of the file and name of the configuration file on the TFTP
server
 TFTP server IP address, the router IP address, and the router interface through
which the file will be loaded
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Refer to the exhibit. The network administrator wishes to use the Cisco Feature Navigator to
choose a Cisco IOS image to install on a router that will allow VoIP functionality. Based on the
output of the show version command, which statement accurately describes the ability of the
router to run the Cisco IOS image selected?
 There is enough DRAM and flash.
 There is enough DRAM but not enough flash.
 There is not enough DRAM but there is enough flash.
 There is not enough DRAM and flash.
If a router is unable to find a suitable IOS to load into RAM, in what mode does the boot
process end?
 setup mode
 user mode
 rommon mode
 privileged mode
Which command can be used to load a new Cisco IOS image on a router?
 copy startup-config tftp:
 copy tftp: startup-config
 copy running-config tftp:
 copy tftp: flash:
 copy flash: tftp:
 copy flash: startup-config
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A WIC-1T module needs to be installed in a Cisco 1841 router that currently has a WIC-2T
module in slot 0. What should the network technician do first?
 Install the hot-swappable option module.
 Turn off the power to the router before installing the new module.
 Remove the WIC-2T module so that the new module can be installed in slot 0.
 Shut down all Fast Ethernet ports on the router until the new WIC module
installation is complete.
 Configure the Cisco IOS software to support an internal trunk link between the two
WIC modules.
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Refer to the exhibit. An administrator installs a WIC-2T module into a Cisco 1841 router.
Attempts to configure the S0/0/0 interface are unsuccessful. As a first step in troubleshooting
the failure, the administrator issues the show version command. What is a possible reason for
the failure?
 The WIC was not physically installed properly.
 The WIC was installed into slot 1 instead of slot 0.
 The interface type and number are invalid on an 1841.
 The configuration register is the wrong value for adding new modules.
Which IOS component can be used to classify and monitor network traffic?
 CDP
 NBAR
 CiscoWorks
 Network Assistant
What is a characteristic of FTP traffic flows?
 low-volume traffic
 predictable bandwidth usage
 large packet sizes for transfers
 low throughput with high response-time requirements
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Refer to the exhibit. Which type of application communication model best describes this
network?
 client-client
 client-server farm
 client-enterprise edge
 client-enterprise server
What is a function of software queuing?
 filters traffic on the basis of administrator defined rules
 stores received traffic and sends packets based on the order that the packets are
received
 sends packets on the basis of priorities that are manually set
 transmits packets in a priority sequence that is based on source port
In a converged network, which two types of traffic would be categorized as real-time traffic?
 e-mail
 file transfer
 web browsing
 videoconferencing
 voice over IP
 video on demand
When implementing an IP telephony solution, why should VLANs be used?
 to allow the use of a single IP gateway
 to separate voice from data traffic for ease of prioritization
 to allow the PBX to use VLAN IDs to filter both voice and data traffic
 to allow connectivity between traditional phone devices and IP-based telephony
devices
A network administrator is integrating IPv6 into an IPv4 network by encapsulating one
protocol packet within another protocol. Which transition method is being used?
 dual stack
 tunneling
 proxying and translation
 NAT with Protocol Translator
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A school district decides to use the 172.30.0.0/16 network for its LAN networks. The network
administrator must create an addressing scheme to support 500 users in the admin office, 200
at the high school, 60 at the elementary school and 28 at the district office. Which VLSM
addressing scheme will correctly address the network with minimal waste?
 172.30.0.0/20 admin
172.30.1.0/21 high school
172.30.1.8/22 elementary
172.30.1.12/26 district
 172.30.0.0/22 admin
172.30.4.0/23 high school
172.30.5.0/24 elementary
172.30.6.0/26 district
 172.30.0.0/23 admin
172.30.2.0/24 high school
172.30.3.0/26 elementary
172.30.3.64/27 district
 172.30.0.0/23 admin
172.30.2.0/24 high school
172.30.3.0/25 elementary
172.30.3.127/26 district
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CCNA4
Refer to the exhibit. The routers are configured with RIPv2 with default configurations. When
attempting to communicate with other networks, hosts from 172.31.1.0/24 are experiencing
connectivity issues. What could be done to resolve this issue?
 Change to a public IP address scheme.
 Disable automatic route summarization.
 Change the IP network address on R3 Fa0/0 to 172.16.1.128 /26.
 Change the subnet mask on the link between R2 and R3 to 255.255.255.0.
Which two values represent valid IPv6 addresses? (Choose two.)
 ::::1
 FF01::1
 0:0:0:0:0:0:0:1
 2001:DB8::47::2A4
 2031:0000:04AC:3400:FFE3:0
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Refer to the exhibit. A network administrator is validating the routing for the new network
design. Which command should be used to configure the s0/0/0 interface of the SALES router
to advertise the Sales Department networks as one route?
 SALES(config-if)# ip summary-address eigrp 100 172.16.0.0 255.255.0.0
 SALES(config-if)# ip summary-address eigrp 100 172.16.8.0 255.255.240.0
 SALES(config-if)# ip summary-address eigrp 100 172.16.16.0 255.255.240.0
 SALES(config-if)# ip summary-address eigrp 100 172.16.31.0 255.255.248.0
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CCNA4
Refer to the exhibit. Which summarized route would be advertised by R1 to R2?
 10.0.0.0/13
 10.4.0.0/14
 10.5.0.0/13
 10.6.0.0/14
A network administrator is configuring a router interface with the command R1(config-if)#
ipv6 address 2001:DB8:C18:1::/64 eui-64. If the MAC address of this Ethernet interface is 011C-70-CF-B4-30, what is the host identifier for this interface under EUI-64 format?
 11C:7000:00CF:B430
 11C:70FE:FECF:B430
 11C:70FF:FECF:B430
 11C:70FF:FFCF:B430
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Refer to the exhibit. Following a test plan, the network systems engineer completes the
configuration of an access layer switch and connects three PCs to test the configuration. The
engineer attempts to ping from each PC to the other connected PCs. Which three statements
describe the expected results of pinging from one host to another? (Choose three.)
 Host1 can ping Host2.
 Host1 cannot ping Host2.
 Host1 can ping Host3.
 Host1 cannot ping Host3.
 Host2 can ping Host3.
 Host2 cannot ping Host3.
29
Refer to the exhibit. A network associate is configuring a new router to provide routing
between VLANs. The associate removes the router from the box and connects the Fa0/0
interface to a trunking port on the switch. After the configuration is applied to the router, the
traffic between VLANs still fails. What is causing this to occur?




CCNA4
The NWRnStick router needs a routing protocol configured.
The NWRnStick router needs additional Fast Ethernet interfaces installed.
The subinterfaces of the NWRnStick router should have IP addresses applied.
All the subinterfaces of the NWRnStick router should be configured in the same VLAN.
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When designing a prototype network for a new server farm, a network designer chooses to
use redundant links to connect to the rest of the network. Which business goal will be
addressed by this choice?
 security
 scalability
 availability
 manageability
31
Refer to the exhibit. A company decides to install a new data center to improve the services
available on the network. EIGRP is chosen as a routing protocol. VLAN 100 is the management
VLAN. After a prototype network is built, the staff executes basic connectivity tests. The
results show very slow convergence after a network failure. Which step should be taken by the
engineers to improve the network performance?
 Eliminate all trunk links in the network.
 Configure per-VLAN rapid spanning tree.
 Configure VLAN 1 as a management VLAN.
 At the distribution layer, replace EIGRP with RIPv2.
32
Refer to the exhibit. The named ACL "Managers" already exists on the router. What will
happen when the network administrator issues the commands that are shown in the exhibit?
 The commands overwrite the existing Managers ACL.
 The commands are added at the end of the existing Managers ACL.
 The commands are added at the beginning of the existing Managers ACL.
 The network administrator receives an error that states that the ACL already exists.
CCNA4
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Refer to the exhibit. EIGRP has been configured as a routing protocol in the network. Users
who are connected on LAN_1 and LAN_2 can ping their default gateways. Users on LAN_1
complain that they are unable to access the resources on the file server that is connected to
LAN_2. A technician issues the show ip interface brief command on R1 to verify the status of
the interfaces. What information will help the technician troubleshoot the issue?
 Interface S0/0/1 line protocol is down.
 Interface Vlan1 is administratively down.
 Interface Fa0/1 is missing an IP address.
 Interface S0/0/0 is configured with an incorrect IP address.
34
Refer to the exhibit. During a test of an EIGRP prototype network, a network administrator
issues a show ip protocols command. What two facts can be determined from the output?
 The administrative distance is 100.
 This router has one adjacent neighbor.
 There are 10 Cisco devices in this prototype network.
 The auto-summary command was applied on this router.
 EIGRP is using two values for the calculation of the composite metric.
 EIGRP on this router will display up to four unequal cost routes to the same
destination.
CCNA4
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CCNA4
Refer to the exhibit. A NetworkingCompany designer is reviewing a diagram of a customer
network. What two risks or issues can be identified in the topology that is shown?
 The firewall router and ISP connection represent a single point of failure.
 A failure of the switch that connects the Cisco Call Manager to the network will
cause the entire IP telephony system to fail.
 Using Layer 3 switches to interconnect the data center servers to the IP phones
introduces too much delay.
 The IP phones need to be redundantly connected to the switches to prevent single
points of failure at the access layer.
 If one of the Layer 3 switches fails, the Cisco Call Manager will be unreachable.
On a Monday morning the help desk at a large company receives an unusually high number
of calls reporting no connectivity to the Internet or to any other network resources.
Otherwise the PCs are functioning normally. Help desk technicians note that all the calls are
from a single department, and all affected users are on the same floor of a single building.
Where should the help desk technicians suspect that the problem lies?
 workgroup switch
 PC power supplies
 patch cords from PCs to network jacks
 cabling from the network jack to the wiring closet
A company is concerned with protecting internal e-commerce servers against external
attacks. An application layer firewall is installed at the network edge and a host-based IDS
system is installed on the internal LAN. What should be done to ensure a fast response and
minimum server downtime in the event of an external attack?
 Replace the host-based IDS with an IPS.
 Place the e-commerce servers in a DMZ.
 Install a logging server to monitor all attacks.
 Replace the application layer firewall with a stateful one.
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38
Refer to the exhibit. Which ACL statements, if properly placed, will prevent host 10.10.10.1
from accessing the 172.16.2.0/24 network but will permit the rest of the 10.10.10.0/24
network?
 access-list 10 permit 172.16.2.0 0.0.0.255
access-list 10 deny 10.10.10.1 0.0.0.0
 access-list 10 deny 10.10.10.1 0.0.0.0
access-list 10 permit 172.16.2.0 0.0.0.255
 access-list 101 deny ip 10.10.10.1 0.0.0.0 172.16.2.0 0.0.0.255
access-list 101 permit ip 10.10.10.0 0.0.0.255 172.16.2.0 0.0.0.255
 access-list 101 permit ip 10.10.10.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 101 deny ip 10.10.10.1 0.0.0.0 172.16.2.0 0.0.0.255
 access-list 10 deny 10.10.10.1 0.0.0.0
39
Refer to the exhibit. An extended ACL has been created to deny traffic from host
192.168.20.254 to the web server with IP address 209.165.201.30. However, host
192.168.20.254 is allowed access to all resources on network 192.168.30.0/24. According to
Cisco best practices, where should the ACL be applied?
 ISP Fa0/0 inbound
 ISP Fa0/0 outbound
 ISP S0/0/0 inbound
 R2 Fa0/0 inbound
 R2 Fa0/0 outbound
 R2 S0/1/0 outbound
CCNA4
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41
42
A bank is planning to add a secure, authenticated WAN connection to a rural branch office.
The connection must provide bandwidth of up to 10 Mb/s with QoS supporting VoIP. Which
WAN connection type should the network designer recommend?
 DSL
 ISDN
 leased line
 Frame Relay
While configuring EIGRP on a router, the technician enters this command:
Router(config-router)# variance 8
What is the effect of entering this command?
 It adjusts the cost of all EIGRP routes to 8.
 It enables unequal cost load balancing on the router.
 It restricts the number of EIGRP feasible successor routes to 8.
 It enables EIGRP equal cost load balancing over a maximum of 8 routes.
 It modifies the number of values used in the composite metric calculation.
A designer is creating a test plan to validate a WAN design that is based on Frame Relay
technology. Which network device can be used in the prototype network to serve as a Frame
Relay switch?
 DSLAM
 CSU/DSU
 Cisco 2950 switch
 Cisco router with appropriate IOS
43
Refer to the exhibit. A pre-sales systems engineer receives a diagram of the exhibited WAN
implementation from a customer. EIGRP is the routing protocol that is used on the WAN.
None of the parameters for EIGRP metric calculation have been modified in any router
configurations. Which statement is true about the routing table on router RM?




CCNA4
There is a single route to the 192.168.24.0/24 LAN using the T1 connection.
There is a single route to the 192.168.24.0/24 LAN using the DSL connection.
There is a single route to the 192.168.24.0/24 LAN using the Metro Ethernet
connection.
EIGRP installs all three routes to the 192.168.24.0/24 LAN and load balances the
traffic.
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45
When implementing a security policy, which two actions should be included as part of the
security checklist? (Choose two.)
 Disable all logging.
 Enable Telnet on TCP port 23.
 Use HTTP for web administration.
 Set timeouts and ACLs on VTY lines.
 Shut down any unused ports and interfaces.
A network administrator has configured Frame Relay on a serial interface and issued the
show interfaces serial command. The output shows that the interface is up and the line
protocol is up. However, pings to the remote router across the link fail. What should the next
step be to ensure that the IP address of the remote router appears in the Frame Relay map
table of the local router?
 Configure the router using the no inverse-arp command.
 Ensure that the LMI type is correct for the circuit.
 Configure the router using the frame-relay map ip command.
 Verify that the remote router has Frame Relay encapsulation enabled.
46
Refer to the exhibit. A NetworkingCompany engineer is characterizing an existing network for
a new customer. The engineer issues a show running-config command on the branch router
to gather configuration information. What is the engineer able to determine as a result of
viewing the output of this command?
 The branch office router has two routes to the main office LANs in the routing table.
 The default route for the branch office traffic is the serial link to the Edge2 router.
 A connection through ISP-A will be used to reach the main office LANs if the Frame
Relay network is unavailable.
 By using both the DSL and the Frame Relay connection, the branch office router will
load balance traffic that is destined for the main office LANs.
CCNA4
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CCNA4
Refer to the exhibit. What can be determined about the operation of DLCI 101?
 It is shut down.
 Traffic flows in only one direction.
 Packet size is limited to 2000 bytes.
 The Frame Relay network is experiencing congestion.
 All packets moving across the link are marked as discard eligible.
A company establishes a Frame Relay connection between corporate headquarters and a
branch office. The CIR for the connection is set at 4 Mb/s. Which statement is true about this
WAN connection?
 The company will not be able to send data faster than 4 Mb/s.
 If the company sends data faster than 4 Mb/s, some of the data frames will be
flagged with a DE bit.
 If the company sends data faster than 4 Mb/s, the TSP will change the CIR to zero.
 When the company sends data faster than 4 Mb/s, the Frame Relay switch will set the
BECN bit to 1 on the frames that are headed to the company.
The main office of a NetworkingCompany customer currently connects to three branch
offices via three separate point-to-point T1 circuits. The customer network uses RIPv2 as the
routing protocol within both the LAN and the WAN. The account manager proposes a change
to a Frame Relay network because the costs are lower. A single local loop connection can be
installed at the main office with three separate PVCs to connect the branch offices. How can
the main office edge router be configured to enable the customer to continue to use RIP as
the WAN routing protocol?
 Enable Inverse ARP on the serial interface in order to learn the routes to the IP
addresses of the remote routers.
 To prevent the Frame Relay network from causing a routing loop, disable split horizon
on the serial interface.
 Create three separate point-to-point subinterfaces on the serial interface and assign
a different subnet IP address to each one.
 Configure the serial interface with a single interface DLCI number and create framerelay map statements for each remote site address.
What type of Frame Relay subinterface must be used to connect remote sites without having
to disable split horizon?
 multipoint
 multiaccess
 point-to-point
 nonbroadcast multiaccess
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