QUESTION#01 

The description of IGMP Snooping- working mechanism is correct

A. Layer 2 switches constantly monitor IGMP packets to establish and maintain the PIM routing table at Layer 2

B. When IGMP Snooping is not running, multicast packets are broadcast at Layer 2. After IGMP Snooping is running, packets are not broadcast at Layer 2

C. If a host sends an IGMP exit packet, the switch adds the host to the corresponding multicast table

D. If a host sends an IGMP host report packet, the switch deletes the multicast entry corresponding to the host

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QUESTION#02 

What IS the minimum length of an IS-IS address in bytes?

A. 2

B. 8

C. 20

D. 16

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QUESTION#03 

The following description of an OSPF special area is incorrect 

A. The Stub Area allows the ABR to advertise default Type 3 Lsas, but does not accept Type 5 Lsas and detailed Type 3 Lsas

B. The difference between the Stub Area and the SSA Area is that the stub area allows the import of external routes from the AS, and the ABR advertises LSA7 to the local area

C. The difference between a tub Area and a Totally stub area is that the Stub area allows routing information to be refined between areas

D. stub area is different from NSSA area in that Totally Stub area does not accept inter-area routing information

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QUESTION#04 

The following description of OSPF neighbor relationships and adjacencies is correct:

A. Adjacency relationships are maintained by OSPF DD packets

B. spf routers must establish adjacency relationships before exchanging Hello packets

C. Neighbor relationships are selected from neighboring relationships and formed for the exchange of routing information

D. Not all neighbor relationships can be adjacencies

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QUESTION#05 

Which of the following does not belong to IGP?

A. RIP

B. IS-IS

C. BGP

D. OSPF

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