Question 1

IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?

Options :

A : If you want IPv4 and IPv6 network computation to form the same shortest path tree, you need to run the ipv6 enable topology ipv6 command to enable the IPv6 capability in the IS-IS process.

B : By default, since R2 does not support IPv6, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R3-R4

C : By default, IPv4 and IPv6 networks will be calculated separately to form different shortest path trees

D : By default, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R2-R4. Since R2 does not support IPv6, R2 will directly discard IPv6 packets after receiving them, causing traffic loss.

Answer: B

Question 2

What is the Router-ID of OSPFv3?

Options :

A : 100bit value

B : 128bit value

C : 32bit value

D : 64bit value

Answer: C

Question 3

MPLS supports nesting of multiple labels. After receiving an MPLS packet, a device first processes the label next to the Layer 2 header, that is, the top MPLS label.

Options :

A : TRUE

B : FALSE

Answer: A

Question 4

What is the LSA whose flooding range is the entire autonomous system in SPFV3?

Options :

A : Link-LSA

B : As-external-LSA

C : Inter-Area-Prefix-LSA

D : Intra-Area-Prefix-LSA

Answer: B

Question 5

Which of the following are advantages of VLAN aggregation?

Options :

A : decreasedIPwaste of address

B : added availableM LANquantity

C : Increased addressing flexibility

D : accomplishSub-VLANIsolation between broadcast domains

Answer: A,D