什么条件下，路由器的S0口状态是down的，但协议状态是up的（）A、S0口没有连接B、S0口有故障C、S0有连接，但用指令shutdownD、不存在这种情况

ACPI为PC机主机定义了6种不同的能耗状态(S0～S5)，S0为正常工作状态。S1～S3为睡眠状态，S4为休眠状态， S5为【 】状态。

Examine the following configuration on Router R1. R1‘s show ip route 172.16.4.1 command list s a route with outgoing interface S0/1/1. Host 172.16.3.3 uses telnet to connect to host 172.16.4.1.What will Router R1 do with the packets generated by host 172.16.3.3 because of the telnet,assuming the packets enter R1‘s F0/0 interface?（）interface Fastethernet 0/0ip address 172.16.1.1 255.255.255.0ip policy route - map Q2!route - map Q2 permitmatch ip address 101set interface s0/0/1!access - list 101 permit tcp host 172.16.3.3 172.16.4.0 0.0.0.255

A. The packet will be forwarded out S0/0 /1, or not at all.

B. The packet will be forwarded out S0/0/1 if it is up.

C. The packet will be forwarded out S0/1/1 if it is up.

D. The packet will be forwarded out S0/1/1 if it is up, or if it is not up, out s0/0/1.

E. The packet will be forwarded o ut S0/0/1 if it is up, or if it is not up, out s0/1/1.

路由器上，命令“show int s0”的显示结果为：Serial0 is up,line protocol is down出现该结果的可能原因是（）

A.端口处于关闭状态

B.物理端口被烧毁

C.两端设备协议不一致

D.路由表中无路由

路由器的s0端口连接——。

A．以太网

B．交换机

C．广域网

D．网桥

为路由器1的s0口配置Internet协议属性参数。

IP地址： (5)；

子网掩码： (6)。

Router R1 has working interfaces S0/0, S0/1, and S0/2, with IP address/prefix combinations of 10.10.10.1/24, 10.10.11.2/24, and 10.10.12.3/22. R1‘s configuration includes the command s router eigrp 9 and network 10.0.0.0. The show ip eigrp interfaces command lists S0/0 and S0/1 in the command output, but not S0/2.Which answer gives the reason for the omission？（）

A. R1 has EIGRP neighbors reachable via S0/0 and S0/1, but not via S0/2, so it is not included.

B. S0/2 may currently be in a state other than up/up.

C. The network 10.0.0.0 command requires the use of mask 255.0.0.0 due to EIGRP being classful by default.

D. S0/2 may be configured as a passive inter face.

● 路由器的S0 端口连接 （13） 。

（13）A. 广域网 B. 以太网 C. 集线器 D. 交换机

●以太网交换机的Console端口连接 (36) ，Ethernet端口连接 (37) 。

(36)A．广域网

B.以太网卡

C．计算机串口

D．路由器S0口

(37)A．广域网

B．以太网卡

C．计算机串口

D.路由器S0口