单项选择题

How are VTP advertisements delivered to switches across the network?（）

A. anycast frames
B. multicast frames
C. broadcast frames
D. unicast frames

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单项选择题
Which pairing reflects a correct protocol-and-metric relationship?（）

A. OSPF and mumber of hops and reliability
B. EIGRP and link cost
C. IS-IS and delay and reliability
D. RIPv2 and number of hops
单项选择题
Which name describes an IPV6 host-enable tunneling technique that uses IPV4 UDP,does not require dedicated gateway tunnels,and can pass through existing IPV4 NAT gateways?（）

A. dual stack
B. dynamic
C. Teredo
D. Manual 6to4
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