A.never takes place
B.periodically
C.during switchover
D.after switchover
E.before switchover
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A.It prevents message looping， Session Advertisement （SA）messages must be RPF checked
B.RPF check should be done against the route to the source S of the corresponding PIM-SM domain
C.RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SA
D.RPF checking Session Advertisement （SA） messages will cause message looping
A.The VPNv6 address is a 96-bit route distinguisher and a 128-brt IPv6 address
B.The VPNv6 address is a 64-bit route distinguisher and a 128-bit IPv6 address
C.The VPNv6 address is a 64-brt route distinguisher and a 96-brt IPv6 address
D.The VPMv6 address is a 96-brt route distinguisher and a 96-bit IPv6 address
E.The VPNv6 address is a 128-bit route distinguisher and a 128-brt IPv6 address
A.NAP and NSP provide secure access to corporate gateways without managing end-to-end PVCs.NAP and NSP use Layer 3 routing，Layer 2 Forwarding，or Layer 2 Tunneling Protocol tunnels.Hence，they can scale their business models for selling wholesale service
B.The NSP can oversubscribe by deploying idle and session timeouts using an industry standard RADIUS server for each subscriber
C.Only a single session per CPE on one virtual channel （VC).The username and password are configured on the CPE， so all users behind the CPE for that particular VC can access only one set ofservices. Users cannot select different sets of services， although using multiple VCs and establishing different PPP session on different VCs is possible
D.If a single IP address is provided to the CPE， and NAT or PAT is implemented，certain applications such as IPTV，which embed IP information in the payload， well not work. Additionally，if an IP subnet feature is used，an IP address also has to be reserved for the CPE
E.PPPoA can use the features on the Cisco Service Selection Gateway （SSG）
A.trunk admission control
B.forwarding traffic to tunnel
C.information distribution
D.path selection， calculation， and setup
E.traffic patterns prediction
A.MPLS is required between the PE and CE routers that connect the backbone carrier to the customer carrier.
B.The backbone carrier must enable the PE router to check that the packets it receives from the CErouter contain only the labels that the PE router advertised to the CE router.
C.Every packet that crosses the backbone carrier must be encapsulated so that the packet includes MPLS labels
D.AII PE routers that link the backbone carrier to the customer carrier must run Route Target Rewrite.
E.Arouting protocol is required between the PE and CE routers that connect the backbone carrierto thecustomer carrier. The routing protocol enables the customer carrier to exchange IGP routing information with the backbone carrier.
最新試題
Cisco IOS XR Software Multicast Routing Implementation， which three features are supported in IPv6 onCisco CRS router？（）
Which two routers support cable access？（）
Which option is not a valid method to assign the lowest-order 64-bit field of an IPv6 unicast address？（）
Which statement is FALSE concerning Concatenation？（）
What layer of the TMN （telecommunications management network） model does CTM fit into？（）
In the Carrier Supporting Carrier （CsC） feature， which two protocols run between CSC-PE and CSC-CE（）.
Which of the following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）
Which three are advantages of SONET？（）
There are two cabling schemes to choose from when implementing a Cisco CRS-1 multishelf system：single-module cabling and multimodule cabling. What is the maximum capacity of the LCCs that aresupported in multimodule cabling？（）
Which three statements about MPLS traffic engineering （MPLS TE） are true？ （）