单项选择题

根据下图，R1能通告给R2的最有效的汇总是？（）

A.172.1.0.0/22
B.172.1.0.0/21
C.172.1.4.0/22
D.172.1.4.0/24 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24
E.172.1.4.0/25 172.1.4.128/25 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24

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多项选择题

What are three IPv6 transition mechanisms?（）

A.6to4 tunneling
B.VPN tunneling
C.GRE tunneling
D.ISATAP tunneling
E.PPP tunneling
F.Teredo tunneling

单项选择题

Given the output of the Floor3 switch, what statement describes the operation of this switch（）。

A.VTP is disabled on this switch.
B.The switch can create, change, and delete VLANs.
C.The switch learns VLAN information but does not save it to NVRAM.
D.The switch can create VLANs locally but will not forward this information to other switches.
E.The switch learns VLAN information and updates the local VLAN data base in NVRAM.

单项选择题

Running both IPv4 and IPv6 on a router simultaneously is known as what?（）

A.4to6 routing
B.6to4 routing
C.binary routing
D.dual-stack routing
E.NextGen routing