A.电话线到NT1的接口
B.NT1到终端的接口
C.交换机到用户板的接口

A.收发传真
B.用户数据通道
C.传送话音
D.传送同步信号
E.传送信令

A.2B+D
B.30B+D
C.同轴电缆
D.普通电话线

A.link bandwidth
B.hop count
C.link cost
D.administrative distance
E.link delay

A.主机地址
B.网络地址
C.组播地址
D.广播地址

A.255.255.255.0
B.255.255.255.128
C.255.255.255.192
D.255.255.255.224

A.10.110.12.0
B.10.110.12.30
C.10.110.12.31
D.10.110.12.32

A.OSPF、EGP、RIP
B.IS-IS、RIP-2、EIGRP、OSPF
C.BGP、IGRP、RIP
D.PPP、RIP、OSPF、IGRP

A.简单，易管理
B.收敛速度快
C.报文量大
D.为避免路由环做特殊处理

A.8
B.9
C.10
D.15
E.16

A.NAT protects network security because privat enetworks are not advertised.
B.NAT accelerates the routing process because no modifications are made on the packets.
C.Dynamic NAT facilitates connections from the outside of the network.
D.NAT facilitates end-to-end communication when IPsec is enable.
E.NAT eliminates the need to re-address all host that require extemal access.
F.NAT conserves addresses through host MAC-level multiplexing.