Ed is a software developer who has been given the task of creating an application
that requires guaranteed delivery of information between end systems. At which
layer of the Open Systems Interconnection (OSI) model does the protocol that
provides the guaranteed delivery run, and what type of protocol must Ed use?
Network layer; connection-oriented
Correct answer:
Transport layer: connection-oriented
Data Link layer; connectionless
Application layer; connectionless
At which layer of the OSI model are UDP datagrams created?
physical
network
Correct answer:
transport
application
While working as a security analyst, you have been asked to monitor the SIEM.
You observed network traffic going from an external IP to an internal host's IP
within your organization's network over port 443. Which of the following
protocols would you expect to be in use?
HTTP
TFTP
Correct answer:
TLS
SSH
Which of the following is a correct listing of the OSI model layers, in order, from
top to bottom?
Presentation, application, transport, session, network, physical, data link
Session, application, presentation, transport, data link, network, physical
Application, session, presentation, transport, network, data link, physical
Correct answer:
Application, presentation, session, transport, network, data link, physical
Physical, data link, transport, network, session, presentation, application
Which type of network is typically confined to a small area, such as a single room,
floor, or building?
WAN
CAN
MAN
Correct answer:
LAN
At which layer of the OSI Model is there a protocol that adds both a header and a
footer to the information that is passed down from an upper layer, thus creating a
frame?
Correct answer:
Data Link
Transport
Network
Session
Physical
Presentation
Application
At which of the following layers of the OSI model do the protocols on a typical LAN
use MAC addresses to identify other computers on the network?
Physical
Network
Correct answer:
Data Link
Transport
Ralph has been contracted to consult for a company that wants to update its
legacy Ethernet network to Gigabit Ethernet. On examining the site, he discovers
that the network is still using coaxial-based thin Ethernet. What change in network
topology must occur to upgrade the existing network to Gigabit Ethernet using
Unshielded Twisted Pair (UTP) cable?
Correct answer:
Bus to Star
Star to Star
Star to Ring
Bus to Ring
Ring to Star
Which layer of the Open Systems Interconnection (OSI) model is responsible for
transmitting signals over the network medium?
Presentation
Correct answer:
Physical
Session
Transport
Network
Application
Data Link
Which layer of the OSI Model is responsible for syntax translation and
compression or encryption?
Correct answer:
Presentation
Application
Network
Data Link
Session
Which layer of the OSI model makes sure the data is in a readable format for the
Application layer?
transport layer
application layer
Correct answer:
presentation layer
session layer
Which of the following is an example of a hybrid topology?
A workstation with two network interface cards, one of which is connected to
a star network and one to a bus network.
Four Ethernet switches, Each with a separate network connection to each of
the other three.
Four workstations, each with a separate network connection to each of the
other three.
Correct answer:
Four Ethernet switches connected using a bus topology.
Which protocol creates the packet?
Correct answer:
IP
UDP
TCP
NIC
Which of the following protocols operate at the application layer of the OSI
Model? (Choose 2.)
Correct answer:
SNMP
UDP
Correct answer:
HTTP
ICMP
IGMP
Which of the following are terms for an area of an enterprise network, separated
by firewalls, which contains servers that must be accessible both from the Internet
and from the internal network? (Choose 3.)
Correct answer:
DMZ
EGP
Stateless network
Intranet
Correct answer:
Screened subnet
Correct answer:
Perimeter network
Which component works at Layer 1 of the OSI seven-layer model?
session software
switch
network protocol
Correct answer:
cable
Which of the following organizations developed the OSI model?
Comite Consulttatif International Telegraphique et Telephonique
Correct answer:
International Organization for Standardization (ISO)
American National Standards Institute (ANSI)
Institute of Electrical and Electronics Engineers (IEEE)
International Telecommunications Union (ITU-T)
Which of the following is not a protocol operating at the network layer of the OSI
model?
Correct answer:
IMAP
IGMP
ICMP
IP
Which OSI layer enables Web browsers to interact with operating system code?
presentation layer
Correct answer:
application layer
transport layer
data link layer
An Ethernet network interface adapter provides functions that span which of the
two layers of the OSI model?
Data link and network
Network and transport
Correct answer:
Physical and data link
Transport and application
NAT operates on which level of the OSI model?
Data Link
Correct answer:
Network
Application
Transport
At which OSI layer is the frame created?
Correct answer:
data link layer
transport layer
session layer
application layer
Which of the following layers of the OSI Model typically have dedicated physical
hardware devices associated with them? (Choose 3.)
Correct answer:
Physical
Correct answer:
Data Link
Transport
Application
Session
Correct answer:
Network
Presentation
Which type of network connects LANs in distant locations?
Correct answer:
WAN
CAN
LAN
MAN
Which layer of the OSI model involves routing?
Correct answer:
network layer
presentation layer
transport layer
application layer
Which of the following features does UDP provide? (Select two.)
Packet acknowledgement
Correct answer:
Connectionless datagram services
Correct answer:
Low overhead
Lost packet retransmission
Data packet sequencing
Ed has been hired to install network cabling for a small private company with 15
employees who need to share files and printers. All of the employees are
physically located within the same building in two separate office spaces directly
adjacent to each other, sharing a common wall and door for access. Both offices
have drop ceilings. The client wants a simple Gigabit that is easy to troubleshoot.
In addition, Ed’s client wants to keep installation costs to a minimum. Which of the
following combinations of topology, cable type, and installation method would
best meet the needs of Ed’s client?
Correct answer:
Star topology, twisted pair cabling, and external installation
Bus topology, coaxial cabling, and external installation
Star topology, coaxial cabling, and external installation
Star topology, fiber-optic cabling, and internal installation
Bus topology, twisted pair cabling, and internal installation
Which of the following topologies requires the installation of terminating resistors
(terminators) at two locations?
mesh
star
Correct answer:
bus
ring
From the options that follow, select the one that best describes the contents of a
typical network frame.
Sender’s MAC address, recipient’s MAC address, data, FCS
Recipient’s e-mail address, sender’s e-mail address, data, FCS
Recipient’s IP address, sender’s IP address, data, FCS
Correct answer:
Recipient’s IP address, sender’s MAC address, data, FCS