Download Valid H12-831_V1.0-ENU Dumps For Good Preparation
Exam
:
H12-831_V1.0-ENU
Title
: HCIP-Datacom-Advanced
Routing & Switching
Technology V1.0
https://www.passcert.com/H12-831_V1.0-ENU.html
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1.In the IS-IS network shown in the figure, R1 introduces the default route through the
"default-route-advertise always level-1" command.
Which of the following descriptions are correct? (Multiple choice)
A. There is a default route in R3's routing table
B. There is a default route in R2's routing table
C. There is no default route in R1's routing table
D. Although R1 is configured with the "default-route-advertise always level-1" command, it cannot import
the default route
Answer: BC
2.In the IS-IS network shown in the figure, R1 introduces the default route through the
"default-route-advertise always level-1" command.
Which of the following descriptions is wrong?
A. Ping any non-existent IP address on R1, such as 10.0.4.4. The data packet will not be sent from R1.
B. 10.0.1.1 can ping 10.0.3.3
C. 10.0.1.1 can ping 10.0.2.2
D. 10.0.2.2 can ping 10.0.3.3
Answer: A
3.In the OSPF network shown in the figure, the area numbers are marked in the figure, where area 1 is
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the Stub area, area 2 is the Totally Stub area, and area 3 is the NSSA area.
By default, which of the following routers does not have a default route in its routing table?
A. R3
B. R5
C. R4
D. R6
Answer: A
4.In the OSPF network shown in the figure, the link cost value has been marked in the figure. R1 enables
OSPF IP FRR. The main path for R1 to reach 10.0.3.3/32 is R1-R2-R3, and the backup path is
R1-R4-R2-R3.
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A. True
B. False
Answer: B
5.In the OSPF network shown in the figure, the cost value of the link is marked in the figure. R1 has
enabled OSPP IP FR and configured the "maximum load-balancing 8" command in the OSPF process.
Which of the following is the cost value of reaching 10.0.35.0/24 in R1's routing table?
A. 10
B. 30
C. 20
D. 40
Answer: B
6.The OSPF protocol requires routers in the same area to save the same link state database LSDB. As
the number of routes on the network continues to increase, some routers cannot carry so much routing
information due to limited system resources. This state is called database overload.
If all routers in an OSPE network are configured with "Isdb-overf1low-limit number 7", which of the
following scenarios may cause the router to enter the Overflow state? (Multiple choice)
A. The number of Type 5 LSAs exceeds 7
B. The number of Type 3 LSAs exceeds 7
C. The number of Type 4 LSAs exceeds 7
D. The number of Type 7 LSAs exceeds 7
Answer: AD
7.In order to protect the BGP protocol from attacks, Keychain authentication can be used between BGP
neighbors to reduce the possibility of attacks. The keychain has a set of passwords that can be
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automatically switched according to the configuration, which is suitable for networks with high security
requirements.
A. True
B. False
Answer: A
8.In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP
neighbor relationships. The Router ID of each device is 10.0.X.X, and the AS number is 6500x, where X is
the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP
through import. R1 adds the Community attribute value (1:1) when sending routes to its neighbors, and all
routers in the network are enabled to transmit community attributes.
R2 and R3 are configured with routing policies that reject routes with a community attribute value of 1:1.
Which of the following is the path for traffic from R3 to 192.168.1.0/24?
A. R3-R2-R4
B. R3-R2-R1
C. R3 has no route to 192.168.1.0/24
D. R3-R5-R1
Answer: C
9.In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP
neighbor relationships. The AS number is 6500X, where X is the router number. R1 and R4 both have
static routes to 192.168.1.0/24, which are introduced into BGP through import. The maximum number of
equal-cost routes configured for EBGP load sharing on R3 is 8.
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By default, the number of equal-cost routes from R3 to 192.168.1.0/24 is which of the following?
A. 2
B. 8
C. 1
D. 3
Answer: A
10.Use "display ospfv3 peer verbose" to view OSPFv3 neighbor information. In the output information,
you can see the peer's Router ID, the global unicast address of the peer's interface, the neighbor's status,
and other content.
A. True
B. False
Answer: B
11.In the OSPFv3 network shown in the figure, the interconnected ports of R1, R2, and R3 have OSPFv3
enabled, and the Router ID of each device is 10.0.X.X, where X is the device number. Check the detailed
information of a certain LSA on R3. From the output information, it can be inferred that the LSA is
generated by R2, and it describes the IPv6 prefix address associated with the Network-LSA.
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A. True
B. False
Answer: A
12.In the OSPFv3 network shown in the figure, the IPv6 address of R3 Loopback0 interface is
2000::3/128, and OSPFv3 is enabled.
Which of the following descriptions are correct? (Multiple choice)
A. R2 will definitely generate a Link-LSA
B. R1 will definitely generate a Network-LSA
C. R3 will definitely generate an Intra-Area-Prefix-LSA
D. The Link-LSA generated by R2 will not appear in R1's LSDB
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Answer: ACD
13.The LSP information generated by a certain IS-IS router is shown in the figure. From the LSP
information, it can be inferred that the router is not the DIS of this link.
A. True
B. False
Answer: A
14.In the OSPFv3 network shown in the figure, area 1 is an NSSA area. R1 imports the external route
2000::1/128 into OSPFv3.
What types of LSAs are in area 0 by default? (Multiple choice)
A. Link-LSA
B. Inter-Area-Router-LSA
C. Inter-Area-Prefix-LSA
D. Intra-Area Prefix-LSA
Answer: ACD
15.In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area
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3 is an NSSA area. The IPv6 address of the R6Loopback0 interface is 2000::6/128. The Router ID of each
device is 10.0.X.X, where X is the device number.
Which of the following descriptions is wrong?
A. The R4 LSDB contains the Inter-Area-Prefix-LSA describing 2000::6/128 generated by R2.
B. The Inter-Area-Prefix-LSA describing 2000::6/128 generated by R2 exists in R1's LSDB.
C. The R6 LSDB contains the Inter-Area-Prefix-LSA describing 2000::6/128 generated by R3.
D. The R5 LSDB contains the Inter-Area-Prefix-LSA describing 2000::6/128 generated by R1.
Answer: C
16.When creating an IPv6 static route, for a point-to-point interface, the outbound interface must be
specified. For a broadcast type interface, the next hop must be specified.
A. True
B. False
Answer: B
17.In the OSPFv3 network shown in the figure, the interconnected ports of R1, R2, and R3 have OSPFv3
enabled, and the Router ID of each device is 10.0.X.X, where x is the device number. Check the detailed
information of a certain LSA on R3, and you can infer from the output information that R1 and R2 are DRs
in the network.
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A. True
B. False
Answer: A
18.The Link-LSA generated by an OSPFv3 router is shown in the figure.
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Which of the following is the number of global unicast addresses configured on the interface?
A. 4
B. 3
C. 1
D. 2
Answer: B
19.To support the processing and calculation of IPv6 routes, IS-IS adds a new MLPID in TLV No. 129.
MLPID is an 8-bit field that identifies a network layer protocol message.
Which of the following is the MLPID value for IPv6?
A. 204
B. 142
C. 232
D. 236
Answer: B
20.In the OSPFv3 network shown in the figure, area 1 is the Totally Stub area, area 2 is the normal area,
and area 3 is the Totally NSSA area. The IPv6 address of the R6 Lopback0 interface is 2000::6/128. The
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Router ID of each device is 10.0.X.X, where X is the device number.
When all links are normal, which of the following descriptions are correct by default? (Multiple choice)
A. The path for R4 to send a data packet to 2000::6 may be R4-R1-R3-R6
B. The path that R4 sends the data packet to reach 2000::6 may be R4-R2-R6
C. The path for R4 to send a data packet to 2000::6 may be R4-R1-R5-R3-R6
D. The path for R4 to send a data packet to 2000::6 may be R4-R1-R2-R6
Answer: ABD
21.The Router ID of R4 is 10.0.4.4. In the LSDB of R4, the LSA shown in the figure is seen. The network
engineer makes the following inferences based on the LSA.
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Which one is wrong?
A. This LSA is generated by R4
B. R4 has two OSPFv3 neighbors
C. R4 is the DR on both links
D. R4 does not support importing external routes into OSPFv3
Answer: D
22.There are many types of MAC address entries on the switch.
Which of the following types are manually configured by the user and cannot be aged? (Multiple choice)
A. Blackhole MAC address table
B. MUX MAC address table
C. Dynamic MAC address table
D. Static MAC address table
Answer: AD
23.As shown in the figure, the network administrator deploys the DHCP Snooping function on the switch
to defend against attacks by DHCP Server impersonators.
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Which of the following interfaces should be set as a DHCP trusted interface?
A. GE0/0/2
B. GE0/0/3
C. GE0/0/1
D. GE0/0/4
Answer: A
24.The network administrator has deployed the DHCP snooping function on the access switch.
Which of the following solutions can be used to reduce the impact of attackers maliciously applying for IP
addresses and causing DHCP Server denial of service? (Multiple choice)
A. Enable the device to generate static MAC entries for interfaces based on the DHCP Snooping binding
table.
B. Configure DHCP Snooping to check the CHADDR field in the DHCP Request message
C. Set the interface on the switch that is connected to the legitimate DHCP server as a trusted interface
D. Limit the number of MAC addresses learned by the switch interface through DHCP Snooping
Answer: ABD
25.When the switch is configured with port isolation function, by default, different hosts belonging to the
same VLAN cannot communicate at layer 1 and layer 3.
A. True
B. False
Answer: B
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