單項選擇題Spanning Tree Protocol IEEE 802.1s defines the ability to deploy which of these?()

A. one global STP instance for all VLANs
B. one STP instance for each VLAN
C. one STP instance per set of VLANs
D. one STP instance per set of bridges


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1.單項選擇題Spanning Tree Protocol IEEE 802.1 s defines the ability to deploy which of these?()

A.one global STP instance for all VLANs
B.one STP instance for each VLAN
C.one STP instance per set of VLANs
D.one STP instance per set of bridges

2.單項選擇題An expanding company is deploying leased lines between its main site and two remote sites. Thebandwidth of the leased lines is 128kb/s each,terminated on different serial interfaces on the main router.These links are used for combined VOIP and data traffic. The network administrator has implemented a VOIP solution to reduce costs,and has therefore reserved sufficient bandwidth in a low latency queue oneach interface for the VOIP traffic. Users now complain about bad voice quality although no drops areobserved in the low latency queue. What action will likely fix this problem?()

A.mark VOIP traffic with IP precedence 6 and configure only fair-queue’ on the links
B.configure the scheduler allocate 3000 1000 command to allow the OoS code to have enough CPU   cycles
C.enable class-based traffic shaping on the VOIP traffic class
D.enable Layer 2 fragmentation and interleaving on the links
E.enable Frame Relay on the links and send voice and data on different Frame Relay PVCs

4.單項選擇題Which multicast address is reserved for cisco-rp-discovery?()

A.224.0.1.37
B.224.0.1.38
C.224.0.1.39
D.224.0.1.40

5.單項選擇題Which of the following is true about the MPLS header and its EXP field size?()

A.The MPLS header is 2 bytes,and the EXP field is 3 bits long.
B.The MPLS header is 1 byte,and the EXP field is 3 bits long.
C.The MPLS header is 4 bytes,and the EXP field is 3 bits long.
D.The MPLS header is 3 bytes,and the EXP field is 3 bits long.

6.多項選擇題Which two statements about SA caching are true?()

A.Caching allows pacing of MSDP messages.
B.Caching reduces join latency.
C.Caching should not be done by an MSDP speaker.
D.Caching is used to update the BGP MDT address family.

7.單項選擇題In order to configure two routers as anycast RPs, which of these requirements, af a minimum, must besatisfied?()

A.Multicast Source Discovery Protocol mesh-groups must be configured between the two anycast RPs.
B.The RPs must be within the same IGP domain.
C.Multicast Source Discovery Protocol must be configured between the two anycast RPs.
D.The two anycast RPs must be IBGP peers.

9.多項選擇題Which three message types are valid PIMv2 message types?()

A.Register
B.Register-Stop
C.Join/Prune
D.Reject
E.Register-Prune
F.Register-Join

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