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Huawei H12-261 Practice Test - Questions Answers, Page 20

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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 191

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Which of the following statements regarding MPLS is false?

A.
MPLS supports multi-layer nesting. The value of the S bit of the innermost label is 1.
A.
MPLS supports multi-layer nesting. The value of the S bit of the innermost label is 1.
Answers
B.
The label space range of dynamic signaling protocols such as LDP and MP-BGP from 16 to 1023.
B.
The label space range of dynamic signaling protocols such as LDP and MP-BGP from 16 to 1023.
Answers
C.
When an IP packet is transmitted on an MPLS network that uses TTL processing in pipe mode, the TTL value of the IP packet decrements by 1 only at the ingress and egress nodes of the MPLS network.
C.
When an IP packet is transmitted on an MPLS network that uses TTL processing in pipe mode, the TTL value of the IP packet decrements by 1 only at the ingress and egress nodes of the MPLS network.
Answers
D.
The MPLS label is 20 bits long and is used for packet forwarding.
D.
The MPLS label is 20 bits long and is used for packet forwarding.
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Suggested answer: C

Question 192

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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?

A.
The device assigns a label to each route of the VPN instance vpna.
A.
The device assigns a label to each route of the VPN instance vpna.
Answers
B.
GigabitEthernet1/0/0 is bound to the VPN instance vpna.
B.
GigabitEthernet1/0/0 is bound to the VPN instance vpna.
Answers
C.
The total number of locally configured VPN instances for which IPv6 address families are enabled is 1.
C.
The total number of locally configured VPN instances for which IPv6 address families are enabled is 1.
Answers
D.
The VPN instance vpna does not receive VPN routes with RT being 2:1.
D.
The VPN instance vpna does not receive VPN routes with RT being 2:1.
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Suggested answer: C

Question 193

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Which of the following statements correctly describe the LDP LSP establishment process?

A.
When the next hop of an LSR changes due to a change in network topology and liberal mode is used, the LSR can use the previous label sent to a non-optimal next hop to quickly reestablish an LSP. Liberal mode requires more memoryand label space than conservative mode.
A.
When the next hop of an LSR changes due to a change in network topology and liberal mode is used, the LSR can use the previous label sent to a non-optimal next hop to quickly reestablish an LSP. Liberal mode requires more memoryand label space than conservative mode.
Answers
B.
By default, for the same FEC, the label mapping that an LSR receives can only originate at the optimal next hop.
B.
By default, for the same FEC, the label mapping that an LSR receives can only originate at the optimal next hop.
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C.
In DoD label advertisement mode, an LSR can distribute labels to a specified FEC without having to receive Label Request messages from its upstream device.
C.
In DoD label advertisement mode, an LSR can distribute labels to a specified FEC without having to receive Label Request messages from its upstream device.
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D.
An LSP is established by binding an FEC to a label and advertising the binding relationship to the upstream LSR.
D.
An LSP is established by binding an FEC to a label and advertising the binding relationship to the upstream LSR.
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Suggested answer: D

Question 194

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If multiple candidate RPs are configured in a multicast domain, which of the following parameters need to be compared when electing the RP of the group from multiple candidate RPs?

A.
IP address of the C-RP interface
A.
IP address of the C-RP interface
Answers
B.
Mask length of the group range that is supported by the C-RP and needs to be matched with the group address joined by receivers
B.
Mask length of the group range that is supported by the C-RP and needs to be matched with the group address joined by receivers
Answers
C.
C-RP interface ID
C.
C-RP interface ID
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D.
C-RP priority
D.
C-RP priority
Answers
Suggested answer: A

Question 195

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Network administrators can use CAR technology in traffic policing.

Which of the following technologies can be applied in CAR?

A.
Dual buckets at dual rates
A.
Dual buckets at dual rates
Answers
B.
Single bucket at a single rate
B.
Single bucket at a single rate
Answers
C.
Three buckets at a single rate
C.
Three buckets at a single rate
Answers
D.
Dual buckets at a single rate
D.
Dual buckets at a single rate
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Suggested answer: D

Question 196

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Router A has an IP route with the destination network segment of 10.0.0.1/32 and outbound interface of GigabitEthernet0/0/1. The following configuration is added:

Assume that router A receives a data packet with the destination IP address of 10.0.0.1.

Which of the following statements are true?

A.
If the source IP address of the data packet is 10.0.1.2, the data packet cannot be forwarded.
A.
If the source IP address of the data packet is 10.0.1.2, the data packet cannot be forwarded.
Answers
B.
If the source IP address of the data packet is 10.0.1.2, the data packet can be forwarded and the DSCP value is set to CS3.
B.
If the source IP address of the data packet is 10.0.1.2, the data packet can be forwarded and the DSCP value is set to CS3.
Answers
C.
If the source IP address of the data packet is 10.0.1.1, the data packet can be forwarded and the DSCP value is set to CS3
C.
If the source IP address of the data packet is 10.0.1.1, the data packet can be forwarded and the DSCP value is set to CS3
Answers
D.
If the source IP address of the data packet is 10.0.1.2, the data packet can be forwarded and the DSCP value remains unchanged.
D.
If the source IP address of the data packet is 10.0.1.2, the data packet can be forwarded and the DSCP value remains unchanged.
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Suggested answer: C

Question 197

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As shown in the following figure, R1 and R2 establish an EBGP peer relationship and the BFD function is enabled. Given this information, which of the following statements is true?

A.
The time taken to detect BFD packets on R1 is 660 ms.
A.
The time taken to detect BFD packets on R1 is 660 ms.
Answers
B.
The time taken to detect BFD packets on R2 is 800 ms.
B.
The time taken to detect BFD packets on R2 is 800 ms.
Answers
C.
The time taken to detect BFD packets on R2 is 600 ms.
C.
The time taken to detect BFD packets on R2 is 600 ms.
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D.
The time taken to detect BFD packets on R1 is 1280 ms.
D.
The time taken to detect BFD packets on R1 is 1280 ms.
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Suggested answer: C

Question 198

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Which of the following statements regarding VXLAN packets are true?

A.
A VNI has 24 bits and is used to identify a VXLAN segment.
A.
A VNI has 24 bits and is used to identify a VXLAN segment.
Answers
B.
The destination UDP port number is 4789.
B.
The destination UDP port number is 4789.
Answers
C.
The outer destination IP address is the IP address of the remote VTEP in a VXLAN tunnel.
C.
The outer destination IP address is the IP address of the remote VTEP in a VXLAN tunnel.
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D.
The source UDP port number is 4789.
D.
The source UDP port number is 4789.
Answers
Suggested answer: A, B

Question 199

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Which packet type is used when BGP EVPN is used to establish VXLAN tunnels?

A.
Type 4
A.
Type 4
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B.
Type 1
B.
Type 1
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C.
Type 2
C.
Type 2
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D.
Type 5
D.
Type 5
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E.
Type 3
E.
Type 3
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Suggested answer: B

Question 200

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Which of the following statements regarding a TCP sliding window are false?

A.
The sender advertises the size of the initial window.
A.
The sender advertises the size of the initial window.
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B.
If the sender does not receive an acknowledgment message after the retransmission timer times out, it retransmits the unacknowledged data.
B.
If the sender does not receive an acknowledgment message after the retransmission timer times out, it retransmits the unacknowledged data.
Answers
C.
The sliding window size can only be increased or remains unchanged.
C.
The sliding window size can only be increased or remains unchanged.
Answers
D.
A TCP sliding window allows the sender to send multiple data packets before receiving an acknowledgment message.
D.
A TCP sliding window allows the sender to send multiple data packets before receiving an acknowledgment message.
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E.
The sender does not need to transmit packets with a complete window size.
E.
The sender does not need to transmit packets with a complete window size.
Answers
Suggested answer: A, B, E
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