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Huawei H12-261 Practice Test - Questions Answers, Page 16

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Which of the following AS-paths can be matched by the AS-Path filter configured using the ip as-path-filter 1 permit ^12.*74$ command?
Which of the following command outputs indicates that a loop has occurred on a switch?
The default SSM group address range is 232.0.0.0/8. Which of the following configurations can be performed to modify the SSM group address range?
In the aggregate ipv4-address {mask | mask-length} [as-set | attribute-policy route-policy-name1 | detail-suppressed | origin-policy route-policy-name2 | suppress-policy route-policy-name3] command, multiple parameters can be used to affect the BGP summarized route and summarization result. Which of the following statements regarding this command are true?
For Huawei S series switches, to control which member switch becomes the master switch of a stack, first power on the switch you wish to be the master switch, and then wait 20 seconds before powering on the other member switches.
Which of the following statements regarding the packet processing method in the MPLS network model are false?
Which of the following statements is true according to the topology shown?
OSPF has been configured on R1 as shown above, but R1 does not learn the routes from any other routers, which of the following are possible causes? (Choose all that apply.)
To reduce the amount of OSPF data and routing information in some areas, OSPF has special area types. Which of the following statements regarding OSPF special areas is true?
The output of the display in vpn-instance verbose command for displaying detailed information about all VPN instances on a network device is as follows. Which of the following statements are false?

Question 151

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Which of the following statements regarding BGP route reflectors (RRs) are true?

A.
An RR advertises routes learned from a client to all connected non-clients and clients.
A.
An RR advertises routes learned from a client to all connected non-clients and clients.
Answers
B.
A backbone network is divided into multiple reflection clusters. Each RR is configured as a non-client of the other RR, and establishes full-mesh IBGP connections with each other.
B.
A backbone network is divided into multiple reflection clusters. Each RR is configured as a non-client of the other RR, and establishes full-mesh IBGP connections with each other.
Answers
C.
Cluster_List is an optional non-transitive attribute and is used to prevent loops in a cluster.
C.
Cluster_List is an optional non-transitive attribute and is used to prevent loops in a cluster.
Answers
D.
The Originator_ID attributes is generated by an RR to prevent loops between clusters.
D.
The Originator_ID attributes is generated by an RR to prevent loops between clusters.
Answers
Suggested answer: C

Question 152

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When router R1 runs OSPF and they display ip routing-table command is executed on R1 to check the routing table, which of the following statements regarding

OSPF information in the routing table is true?

A.
In the routing table, the routing entries identified by the O_ASE identifier can be learned only through route import.
A.
In the routing table, the routing entries identified by the O_ASE identifier can be learned only through route import.
Answers
B.
In the routing table, the routing entries identified by the OSPF identifier can be learned through Type 1/2/3/5 LSAs.
B.
In the routing table, the routing entries identified by the OSPF identifier can be learned through Type 1/2/3/5 LSAs.
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C.
In the routing table, the routing entries marked OSPF can be learned only through Type 1 LSAs.
C.
In the routing table, the routing entries marked OSPF can be learned only through Type 1 LSAs.
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D.
In the routing table, the routing entries identified by the OSPF identifier can be learned only through Type 3 LSAs.
D.
In the routing table, the routing entries identified by the OSPF identifier can be learned only through Type 3 LSAs.
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Suggested answer: C

Question 153

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IS-IS elects a DIS on a broadcast network. Which of the following statements regarding DIS are true? (Choose three.)

A.
DIS preemption is supported. After successful DIS preemption, LSPs do not need to be flooded.
A.
DIS preemption is supported. After successful DIS preemption, LSPs do not need to be flooded.
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B.
IS-IS elects the DIS by comparing preferences. If the preferences are the same, IS-IS compares MAC addresses.
B.
IS-IS elects the DIS by comparing preferences. If the preferences are the same, IS-IS compares MAC addresses.
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C.
On a broadcast network, the DIS sends Hello PDUs at a frequency that is three times the frequency of non-DIS routers.
C.
On a broadcast network, the DIS sends Hello PDUs at a frequency that is three times the frequency of non-DIS routers.
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D.
The DIS periodically sends CSNPs to ensure LSDB synchronization.
D.
The DIS periodically sends CSNPs to ensure LSDB synchronization.
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Suggested answer: B, C, D

Question 154

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In which scenarios can an AS-Path-filter be used? (Choose three.)

A.
apply clause in a route-policy
A.
apply clause in a route-policy
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B.
Filtering routes received from BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter import command.
B.
Filtering routes received from BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter import command.
Answers
C.
if-match clause in a route-policy
C.
if-match clause in a route-policy
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D.
Filtering routes sent to BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter export command.
D.
Filtering routes sent to BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter export command.
Answers
Suggested answer: B, C, D

Question 155

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Routers R1 and R2 run BGP. Both the routers reside in AS 65234. Routes of R2 exist in the BGP routing of R1 but do not exist in the IP routing table of R1.

What is the cause of this problem?

A.
BGP is disabled on both R1 and R2.
A.
BGP is disabled on both R1 and R2.
Answers
B.
Multi-hop BGP is disabled on R1.
B.
Multi-hop BGP is disabled on R1.
Answers
C.
The routes are not optimal.
C.
The routes are not optimal.
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D.
The BGP peer relationship between R1 and R2 is in Down state.
D.
The BGP peer relationship between R1 and R2 is in Down state.
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Suggested answer: D

Question 156

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As shown in the figure, in IPv4 and IPv6 environments, the value of the SEL field in the IS-IS NET address is always 00.

A.
TRUE
A.
TRUE
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B.
FALSE
B.
FALSE
Answers
Suggested answer: A

Question 157

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In the figure, the first record shows an LSP in the LSDB of a router, and the second record shows a newly received LSP. Which of the following statements is false?

A.
The router adds the newly received LSP to the LSDB.
A.
The router adds the newly received LSP to the LSDB.
Answers
B.
The router will ignore the LSPs received from neighbors.
B.
The router will ignore the LSPs received from neighbors.
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C.
The router sends PSNPs if it is a point-to-point network.
C.
The router sends PSNPs if it is a point-to-point network.
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D.
If it is a broadcast network, the DIS adds the summary information of the newly received LSP to the next CSNP.
D.
If it is a broadcast network, the DIS adds the summary information of the newly received LSP to the next CSNP.
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Suggested answer: B

Question 158

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Which of the following statements about BGP load balancing are false? (Choose three.)

A.
The AS_Path attribute values of equal-cost routes for load balancing must be different.
A.
The AS_Path attribute values of equal-cost routes for load balancing must be different.
Answers
B.
When BGP load balancing is implemented, the local device can change the next-hop address of routes to its own address when advertising the routes toIBGP peer groups only if the peer next hop-local command is configured.
B.
When BGP load balancing is implemented, the local device can change the next-hop address of routes to its own address when advertising the routes toIBGP peer groups only if the peer next hop-local command is configured.
Answers
C.
Load balancing can be implemented among BGP routes with different origins but having the same destination network segment.
C.
Load balancing can be implemented among BGP routes with different origins but having the same destination network segment.
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D.
Load balancing can be implemented among IBGP routes and EBGP routes having the same destination on the public network.
D.
Load balancing can be implemented among IBGP routes and EBGP routes having the same destination on the public network.
Answers
Suggested answer: A, C, D

Question 159

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BGP can automatically summarize only routes with the Origin attribute being Incomplete.

A.
TRUE
A.
TRUE
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B.
FALSE
B.
FALSE
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Suggested answer: A

Question 160

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Which of the following statements route import is false?

A.
Importing IBGP routes into the OSPF process may cause routing loops.
A.
Importing IBGP routes into the OSPF process may cause routing loops.
Answers
B.
By default, the metric of external routes imported into the OSPF process is 1 and the type of imported external routes is Type 2.
B.
By default, the metric of external routes imported into the OSPF process is 1 and the type of imported external routes is Type 2.
Answers
C.
BGP can generate routes in either Import or Network mode. The Network mode is more precise than the Import mode.
C.
BGP can generate routes in either Import or Network mode. The Network mode is more precise than the Import mode.
Answers
D.
After IS-IS Level-2 routes are imported to an IS-IS Level-1 area, routing loops occur if no route import policy is manually configured.
D.
After IS-IS Level-2 routes are imported to an IS-IS Level-1 area, routing loops occur if no route import policy is manually configured.
Answers
Suggested answer: B
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