单项选择题
A.The 172.16.1.1 neighbor is down.
B.The prefix 10.10.10.0/24is not a’connected’route.
C.This route is not a BGP learned route.
D.The network command is wrong.
E.None of the other alternatives apply
单项选择题 Part of the routing table of router R1 is displayed below： S 62.99.153.0/24 [1/0] via 209.177.64.130 172.209.12.0/32 is subnetted， 1 subnets D EX 172.209.1 [170/2590720] via 209.179.2.114， 06：47：28， Serial0/0/0.1239 62.113.17.0/24 is variably subnetted， 2 subnets， 2 masks D EX 99.3.215.0/24 [170/27316] via 209.180.96.45， 09：52：10， FastEthernet11/0/0 [170/27316] via 209.180.96.44， 09：52：10， FastEthernet11/0/0 25.248.17.0/24 [90/1512111] via 209.179.66.25， 10：33：13， Serial0/0/0.1400001 [90/1512111] via 209.179.66.41， 10：33：13， Serial0/0/0.1402001 62.113.1.0/24 is variably subnetted， 12 subnets， 2 masks D 62.113.1.227/32 [90/2611727] via 209.180.96.45， 10：33：13， FastEthernet1/0/0 [90/2611727] via 209.180.96.44， 10：33：13， FastEthernet1/0/0 S* 0.0.0.0/0 [1/0] via 209.180.96.14 From analyzing the above command output， what is the administrative distance of the externalEIGRP routes？（）
多项选择题 EIGRPisbeingusedastheroutingprotocolonthecompanynetwork.Whiletroubleshootingsomenetworkconnectivityissues，younoticealargenumberofEIGRPSIA（StuckinActive）messages.WhatcausestheseSIAroutes？（）
多项选择题 Incomputernetworkingamulticastaddressisanidentifierforagroupofhoststhathavejoinedamulticastgroup.MulticastaddressingcanbeusedintheLinkLayer（OSILayer2），suchas EthernetMulticast，aswellasattheInternetLayer（OSILayer3）asIPv4orIPv6Multicast.Whichtwodescriptionsarecorrectregardingmulticastaddressing？（）