下列是一台Cisco路由器的部分路由表信息,表中的路由信息完全正确的是( )。

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问题 下列是一台Cisco路由器的部分路由表信息,表中的路由信息完全正确的是(    )。

选项 A、O E2 202.205.159.0/24[110/20]via 202.112.62.242,7wod,GigabitEthernet4/2  
O E2 202.205.158.0/24[110/20]via 202.112.62.242,7wod,GigabitEthernet4/2   
          202.38.97.0/30 is subnetted,1 subnets   
S     202.38.97.196[1/0]via GigabitEthemet4/2    C    202.112.7.O/24 is directly connected.FastEthernet2/5
C  202.112.38.16 iS directly connected.POS3/0
O E1 202.112.38.72[110/21]via 202.112.62.242,2w6d,GigabitEthernet4/2
S  202.112.236.0/24[I/0]via GigabitEthernet4/2
    219.243.224.0/29 iS subnetted.1 subnets
C    219.243.224.168 iS directly connected.FastEthemet2/2
S    202.112.236.0/24[I/0]via GigabitEthernet4/2
    162.105.0.0/16 iS variably subnetted.209 subnets.4 masks
    O  162.105.139.64/26[1 10/3]via 162.105.250.118,10:35:25,GigabitEthernet7/0
    S*0.0.0.0/O [100/0]via 202.112.38.17
B、    O E2 202.205.159.0/24[1 10/20]via 202.112.62.242,7wod,GigabitEthemet4/2
    O E2 202.205.158.0/24[1 10/20]via 202.1 12.62.242,7wod,GigabitEthernet4/2
    202.38.97.0/30 iS subnetted.1 subnets
    S    202.38.97.196『I/0]via 202.112.41.226
    C    202.112.7.0/24 iS directly connected.7wod.FastEthernet2/5
    C    202.112.38.16 iS directly connected.7wod.POS3/0
    O E1 202.112.38.72[110/21]via 202.1 12.62.242,2w6d,GigabitEthernet4/2
    S    202.1 12.236.0/24[1/0]via 202.112.41.8
    219.243.224.0/29 iS subnetted.1 subnets
    C    219.243.224.168 iS directly connected,7wod,FastEthernet2/2
    S    202.112.236.0/24 [1/0 ] via 202.112.41.8
    162.105.0.0/16 iS variably subnetted,209 subnets.4 masks
    O  162.105.139.64/26[1 10/3]via 162.105.250.118,10:35:25,GigabitEthernet7/0
    S*0.0.0.0/1 l 100/0 I via 202.112.38.17
C、   O E2 202.205.159.0/24[110/20]via 202.112.62.242,7wod,GigabitEthernet4/2
    O E2 202.205.158.0/24 l 1 10/20 l via 202.112.62.242,7Wod,GigabitEthernet4/2
    202.38.97.0/30 iS subnetted.1 subnets
    S    202.38.97.196 [1/0 ] via 202.112.41.226
    C    202.112.7.0/24 iS directly connected.FastEthemet2/5
    C    202.112.38.16 iS directly connected.POS3/0
    O E1 202.112.38.72[1 10/21]via 202.112.62.242,2w6d,GigabitEthernet4/2
    S    202.112.236.0/24 l I/0 I via 202.112.41.8
    219.243.224.0/29 is subnetted,1 subnets
    C    219.243.224.168 iS directly connected.FastEthernet2/2
    S  202.112.236.0/24[1/0]via 202.112.41.8
    162.105.0.0/16 iS variably subnetted.209 subnets.4 masks
    O    162.105.139.64/26 l l 10/3 l via 162.105.250.118,10:35:25,GigabitEthemetT/0
    S*0.0.0.O/o[1/0]via 202.112.38.17
D、   O E2 202.205.159.0/24[1 10/20]via 202.112.62.242,7w0d,GigabitEthemet4/2
    O E2 202.205.158.0/24[110/20]via 202.112.62.242,7wOd,GigabitEthernet4/2
    202.38.97.0/30 is subnetted,1 subnets
    S  202.38.97.196[I/0]via 202.1 12.41.226
    C  202.112.7.0/24 is directly connected,7wod,VLANl2
    C  202.112.38.16 is directly connected,7wod,VLANl3
    O E1 202.1 12.38.72[1 10/21]via 202.1 12.62.242,2w6d,GigabitEthemet4/2
    S  202.112.236.0/24[I/0]via 202.112.41.8
    219.243.224.0/29 is subnetted,1 subnets
    C  219.243.224.168 is directly connected,7wod,VLANl4
    S  202.112.236.0/24[I/0]via 202.112.41.8
    162.105.0.0/16 is variably subnetted,209 subnets,4 masks
    O  162.105.139.64/26[1 10/3]via 162.105.250.1 18,10:35:25,GigabitEthernet7/0
    S*0.0.0.0/0[100/0]via 202.112.38.17

答案C

解析 路由表中第一列指明路由源码,“c”表示为直连(connecteD),管理距离0,表示目的网络直接与路由器的端口相连。“S”表示为静态(stati@C@路由,管理距离1。“O”表示OSPF、协议,管理距离110,E1表示OSPF外部路由类型1,E2表示OSPF外部路由类型2,*表示缺省路由(Candida,te default)选项。选项A“202.38.97.196[1/0]via GigabitEthemet4/2”和“202.112.236.0/24[1/O]via GigabitEthemet4l/2”语句中“Via”后面应该加的是具体的IP地址;选项B和选项D语句中“S*0.0.0.0/0[100/0]via 202.112.38.17”距离值错误,应该是[1/0]。故选择C选项。
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