單項(xiàng)選擇題Which of the following characteristics applies only to OSPFv3 and not to OSPFv2？（）

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


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1.多項(xiàng)選擇題You issue the command show process memory ∣ include BGP and notice that BGP is consuming alarge percentage of the router’s memory. Which of the following steps would result in lowering theamount of memory being consumed by BGP？（Choose all that apply.）（）

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

2.多項(xiàng)選擇題Which of the following types of attacks does DHCP snooping prevent？（Choose all that apply.）（）

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

4.多項(xiàng)選擇題Which of the following router models will support 1000 tunnels？（）

A.2811
B.2801
C.2851
D.2821
E.1841
F.3825

5.單項(xiàng)選擇題Which of the following is not a typical maintenance task within a network maintenance model？（）

A.Providing technical customer support
B.Changing configurations
C.Updating software
D.Monitoring network performance
E.Replacing hardware
F.Scheduling backups

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