Which of the following troubleshooting targets is considered to be a Layer 2 issue？（Choose allthat apply.）（）

多项选择题Whichofthefollowingareconsideredcommonelementsfoundinasetofnetworkdocuments？（Chooseallthatapply.）（）

A.Building schematic
B.IGP community elements
C.Listing of interconnections
D.Physical topology diagram
E.Logical topology diagram
F.Inventory of network equipment

单项选择题ArouterhasbeenconfiguredwithanEIGRPvarianceof3.Whichofthefollowingstatementsistrue？（）

A.An error will result because a router cannot be configured with an EIGRP variance of 3 becausethe maximum variance number is 2
B.The successor route will end up in the routing table， and so will any route with a metric at mostthree times greater than the value of the successor’s metric
C.EIGRP will only advertise routes that are within three hops of the current router
D.The successor route will end up in the routing table， and so will any route with a metric at leastone third the value of the successor’s metric
E.The best three routes with equal cost paths will end up in the routing table
F.The successor route will be any route with three times the value of the advertised distance

单项选择题WhichofthefollowingcharacteristicsappliesonlytoOSPFv3andnottoOSPFv2？（）

A.Several processes can exist simultaneously
B.Requires direct connectivity from the backbone area to all other areas
C.Has the same packet types
D.Can support multiple subnets on a single link
E.Uses a hierarchical structure divided into areas
F.Adjacencies formed with neighbors

多项选择题Youissuethecommandshowprocessmemory∣includeBGPandnoticethatBGPisconsumingalargepercentageoftherouter’smemory.WhichofthefollowingstepswouldresultinloweringtheamountofmemorybeingconsumedbyBGP？（Chooseallthatapply.）（）

A.Filter unneeded BGP routes
B.Run BGP on a different platform that already has more memory
C.Upgrade the router memory
D.Increase the BGP update timer
E.Compress the BGP table
F.Use a default route instead of maintaining a full BGP table

多项选择题WhichofthefollowingtypesofattacksdoesDHCPsnoopingprevent？（Chooseallthatapply.）（）

A.Attacker sends multiple DHCP requests flooding DHCP server
B.Attacker connects rogue server initiating DHCP requests
C.Attacker connects rogue server replying to DHCP requests
D.Attacker sends DHCP jam signal causing DHCP server to crash
E.Attacker sends gratuitous ARP replies， thereby jamming the DHCP server
F.Attacker sends unsolicited DHCP replies， thereby jamming the DHCP server