A.端口号小于此数字的服务
B.端口号大于此数字的服务
C.端口号等于此数字的服务
D.端口号不等于此数字的服务

A.链路空闲时间
B.忙端口的空闲时间
C.链路断开时间
D.端口数据可以发送等待时间

A.RSTP significantly reduces topology reconverging time after a link failure.
B.RSTP expends the STP port roles by adding the alternate and backup roles.
C.RSTP port atates are blocking，discarding，learing，orforwarding.
D.RSTP also uses the STP proprsal-agreement sequence.
E.RSTP use the same timer-baseed processas STP on point-to-pointlinks.
F.RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

A.acl
B.dialer enable-circular
C.dialer-group
D.dialer-rule

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