A client host uses IPv4 to communicate with one ser ver and IPv6 to communicate with another.Which of the following IPv6 coexistence features is likely at work on the host?（）

单项选择题An enterprise has plans to start adding IPv6 support. The initial deployment requires support from some IPv6 - only device s that need to access servers that support only IPv4. Which of the following tools would be most appropriate?（）

A. Native IPv6
B. Point - to -point tunnels
C. Multipoint tunnels
D. NAT - PT

单项选择题An enterprise h as plans to start adding IPv6 support. For the first year, the IPv6 will be in small pockets spread around the existing large IPv4 network, with occasional IPv6 traffic while applications teams test IPv6 - enabled servers and applications. Which of the fol lowing tools would be most appropriate?（）

A. Native IPv6
B. Point - to -point tunnels
C. Multipoint tunnels
D. NAT - PT

单项选择题Router R1 has been conf igured with an ipv6 route 2000:: 64 S0 0 0 64 command.Which of the following does the 64 at the end of the command represent?（）

A. Metric
B. Administrative distance
C. Timeout (seconds)
D. Prefix length
E. Interface ID

单项选择题The following output occurs on Router R1 , which runs both EIGRP for IPv6 and OSPFv3, with redistribution from EIGRP into OSPF configured with the redistribute eigrp 1 metric 25 command. Interface S0 0 1 has been enabled for EIGRP ASN 1. Which of the following should be true of redistribution in this case?（） D 2000:: 64 [90 1422516] via FE80::213:19FF:FE7B:5026, Serial0 0 1 C 2000:0:0:1:: 64 [0 0] via Serial0 0 1, directly connected L 2000::1:213:19FF:FE7B:5004 128 [0 0] via Serial0 0 1, receive

A. Route 2000::/64 will be redistributed.
B. Route 2 000:0:0:1::/64 will be redistributed.
C. Route 2000:1:213:19FF:FE7B:5004/128 will be redistributed.
D. No routes will be redistributed because of the omission of the subnets parameter of the redistribute command.

单项选择题Router R1 currently has no configuration related to IPv6 or IPv4. The following configuration exists in a planning document, intended to be used to copy paste into Router R1 to enable OSPFv3 on interfaces F0 0 and S0 0 0. No other related configuration exists. Assuming F0 0 and S0 0 0 reach an up up state, which of the following is true about OSPFv3 on R1 after this configuration has been pasted into R1?（） ipv6 router ospf 1 ipv6 unicast- routing interface f0 0 ipv6 address 2000 ::1 64 ipv6 ospf 1 area 1 interface s0 0 0 ipv6 address 2001:: 64 eui - 64 ipv6 ospf 1 area 0

A. OSPF works on F0/0 and S0/0/0 without further configuration
B. OSPF works with the addition of one command: a no shutdown command in OSPF router configur ation modE
C. OSPF works with the addition of one command: an router - id command in OSPF router configuration modE
D. OSPFv3 needs at least two more configuration commands before it works on R1