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Huawei H12-891 Practice Test - Questions Answers, Page 27

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When there are multiple redundant links in an IS-IS network, multiple equivalent routes may occur.

Regarding equivalent routing within an IS-IS network, which of the following descriptions is wrong?

A.
When the number of equivalent routes present in the networking is greater than the number configured by the command, and these routes have the same priority, the next hop device System IlD large routes are preferred for load sharing
A.
When the number of equivalent routes present in the networking is greater than the number configured by the command, and these routes have the same priority, the next hop device System IlD large routes are preferred for load sharing
Answers
B.
After you configure the equivalent routing priority, when the IS-S device forwards traffic to the destination segment, it will not use load sharing, but forward the traffic to the next hop with the highest priority
B.
After you configure the equivalent routing priority, when the IS-S device forwards traffic to the destination segment, it will not use load sharing, but forward the traffic to the next hop with the highest priority
Answers
C.
For each of the equivalent routes, you can assign a priority, with the highest priority routes preferred and the rest as backup routes
C.
For each of the equivalent routes, you can assign a priority, with the highest priority routes preferred and the rest as backup routes
Answers
D.
If load sharing is configured, traffic is evenly distributed across each link
D.
If load sharing is configured, traffic is evenly distributed across each link
Answers
Suggested answer: D

MQC, like PBRócan only be called under the device's Layer 3 interface.

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

IsIS IPv6 cost 50 is configured under the interface, and the meaning of the command is ?

A.
The LEVEL-1 and Level-2 costs of the interface's IS-IS IPv6 are 50
A.
The LEVEL-1 and Level-2 costs of the interface's IS-IS IPv6 are 50
Answers
B.
The LEVEL-1 and Leve1-2 costs of the INTERFACE's IS-IS IPv6 are both 60
B.
The LEVEL-1 and Leve1-2 costs of the INTERFACE's IS-IS IPv6 are both 60
Answers
C.
The LEVEL-2 cost of the interface's IS-IS IPv6 is 50
C.
The LEVEL-2 cost of the interface's IS-IS IPv6 is 50
Answers
D.
The LEVEL-1 cost of the interface's IS-IS IPv6 is 50
D.
The LEVEL-1 cost of the interface's IS-IS IPv6 is 50
Answers
Suggested answer: A

Regarding the description of the BGP neighbor, the error is:

A.
BGP routers that support autodiscovery neighbors
A.
BGP routers that support autodiscovery neighbors
Answers
B.
BGP establishing neighbors must be configured with MD5 authentication
B.
BGP establishing neighbors must be configured with MD5 authentication
Answers
C.
BGP needs to establish a UDP connection before establishing a neighbor
C.
BGP needs to establish a UDP connection before establishing a neighbor
Answers
D.
BGP to establish a neighbor relationship needs to first interact with the link state information
D.
BGP to establish a neighbor relationship needs to first interact with the link state information
Answers
Suggested answer: A, B, C, D

The following statement about IS-IS (IPv6) is correct?

A.
In order to support the processing and calculation of IPv6 routes, IS-IS has added TLV232 and 236
A.
In order to support the processing and calculation of IPv6 routes, IS-IS has added TLV232 and 236
Answers
B.
By default, IS-IS has the multi-topology feature turned on
B.
By default, IS-IS has the multi-topology feature turned on
Answers
C.
IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
C.
IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
Answers
D.
In order to support the processing and calculation of IPv6 routes, IS-IS has added NLPID to the 129 TLV
D.
In order to support the processing and calculation of IPv6 routes, IS-IS has added NLPID to the 129 TLV
Answers
Suggested answer: A, C, D

In the evolution from IPv4 networks to IPv6, some transition technologies have emerged, which of the following are common types of transition technologies?

A.
Dual-stack technology
A.
Dual-stack technology
Answers
B.
Tunneling Technology
B.
Tunneling Technology
Answers
C.
Compatible with Technology
C.
Compatible with Technology
Answers
D.
Conversion Technology
D.
Conversion Technology
Answers
Suggested answer: A, B, C, D

Regarding the description of the encapsulation format of the labels in MPLS, the correct one is ?

A.
The TTL field in the label has a similar meaning to the TTL (Time To Live) in the IP packet, and also has the effect of preventing loops
A.
The TTL field in the label has a similar meaning to the TTL (Time To Live) in the IP packet, and also has the effect of preventing loops
Answers
B.
The total length of an MPLS single tag is 4 bytes (32 bits).
B.
The total length of an MPLS single tag is 4 bytes (32 bits).
Answers
C.
For Ethernet, PPP packets, the tag stack is like a "cushion layer", located between the layer 2 header and the data, and when there is a VLAN tag, the MPLS header is placed on the Ether head and VLANtag between
C.
For Ethernet, PPP packets, the tag stack is like a "cushion layer", located between the layer 2 header and the data, and when there is a VLAN tag, the MPLS header is placed on the Ether head and VLANtag between
Answers
D.
label in the S field, lbit Used to identify whether the label is a bottom label, and a value of 1 indicates that it is the penultimate label
D.
label in the S field, lbit Used to identify whether the label is a bottom label, and a value of 1 indicates that it is the penultimate label
Answers
Suggested answer: A, B

In an MPLS domain, depending on how the LSR handles the data, the LSR can be divided into Ingress LSR, Transit LSR, and Transit LSR Egress LSR? For the same FEC An LSR can be an Iningress LSR for that EC or a Transit for that FEC LSR.

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

The following statement about the VPNv4 address is wrongly described as ?

A.
By default, PE does not perform VPN-target filtering on received VPNv4 routes.
A.
By default, PE does not perform VPN-target filtering on received VPNv4 routes.
Answers
B.
Local PE sets up An Export Target for these routes before releasing VPNv4 routes learned from sites that are directly connected to them to other PEEs attributes, and are published with routes as extended community attributes for BGP.
B.
Local PE sets up An Export Target for these routes before releasing VPNv4 routes learned from sites that are directly connected to them to other PEEs attributes, and are published with routes as extended community attributes for BGP.
Answers
C.
Carries the RD attribute when BGP publishes both reachable and unreachable VPNv4 routes.
C.
Carries the RD attribute when BGP publishes both reachable and unreachable VPNv4 routes.
Answers
D.
The VPNv4 address has a total of 12 bytes, including an 8-byte route identifier RD (Route Distingulisher) and a 4-byte IPv4 Address prefix.
D.
The VPNv4 address has a total of 12 bytes, including an 8-byte route identifier RD (Route Distingulisher) and a 4-byte IPv4 Address prefix.
Answers
Suggested answer: A

What about the description of IGMP Snooping, is it correct?

A.
IGMP Snooping solves the problem of multicast messages broadcasting in layer 3
A.
IGMP Snooping solves the problem of multicast messages broadcasting in layer 3
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B.
IGMP Snooping does not consume the CPU of the switch
B.
IGMP Snooping does not consume the CPU of the switch
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C.
IGMP Snooping establishes a MAC multicast address table by listening for IGMP packets sent by the host
C.
IGMP Snooping establishes a MAC multicast address table by listening for IGMP packets sent by the host
Answers
D.
IGMP Snooping runs at the link layer and is a multicast constraint mechanism on Layer 2 Ethernet switches that manages and controls multicast groups
D.
IGMP Snooping runs at the link layer and is a multicast constraint mechanism on Layer 2 Ethernet switches that manages and controls multicast groups
Answers
Suggested answer: C, D
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