A.Routing loops
B.Misconfiguration of VPN end points
C.Overiapping IP address space
D.DMVPN
E.User profiles
F.MTU

A.2001：0000：0：abc：0000：0000：a：b
B.2001：：abc：：a：b
C.2001：：abc：0：0：000a：000b
D.2001：：0abc：0000：0000：a：b
E.2001：0000：0000：abc：：a：b
F.2001：：abc：0：0：a：b

A.Quality of Service
B.Trunk configuration
C.Access lists
D.Routing protocol configuration
E.Power over Ethernet
F.DHCP configuration

A.Create an IPv4 tunnel and assign the tunnel IPv6 addresses
B.Create IPv4 interfaces on both ends of the network， and use either static routes or a routingprocess to direct IPv6 packets through those interfaces
C.IPv6 packets cannot be encapsulated with IPv4 headers because the addresses are notcompatible
D.Create IFV6 interfaces on both ends of the network， and use static routes to point the IPv4address to those interfaces
E.Use an IPv6 routing protocol like OSPFv3 and assign IPv4 packets to that process
F.Create an IPv4 tunnel and use the tunnel mode ipv6ip command

A.show ip route ∣ to tftp：//192.168.1.1/route.txt
B.show ip route ∣ tee tftp：//192.168.1.1/route.txt
C.show ip route ∣ include tftp：//192.168.1.1/route.txt
D.show ip route ft include tJtp：//19Z168.1.1/route.txt
E.show ip route ∣ redirect tftp：//192.168.1.1/route.txt

A.Link-local address used for next-hop addresses
B.Interface can be added to RIP routing process in either interface configuration mode or in routerconfiguration mode
C.Uses a multicast to send routing updates
D.Use hop count as a metric
E.Distance-vector routing protocol
F.Maximum hop count is 15 with 16 being "unreachable"

A.The default-metric command configured under the appropriate interface
B.The metric parameter in the network command of a routing process
C.The metric parameter in the redistribute command
D.The default-metric command
E.A route-map containing a seed command
F.A route map containing a metric command

A.Designated port
B.Nonswitch port
C.Switch port
D.Nonroot port
E.Nondesignated port
F.Root port

A.show ip eigrp topology
B.show ip eigrp adjacency
C.show ip eigrp routes
D.show ip eigrp database
E.show ip route eigrp
F.show ip eigrp forwarding

A.255.255.255.255
B.224.0.0.6
C.FFFF：FFFF：FFFF：FFFF：FFFF：FFFF：FFF：FFF
D.FF02：：10
E.224.0.0.10
F.FF02：：5

A.Rl（config-if）#ipv6 default-information originate
B.Rl（config-router）#ipv6 rip 〈process-name〉 default-information only
C.Rl（config）#ipv6 route ：：/0 null 0
D.Rl（config-if）#ipv6 rip 〈process-name〉 default-information only
E.Rl（config-router）#ipv6 rip route ；：/0 originate
F.Rl（config-router）#aggregate-address ：：/0 summarize-routes