下列是一台Cisco路由器的部分路由表,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,表中的路由信息完全正确的是

选项 A、Gateway oflast resort iS 202.112.41.217 to network 0.0.0.0
C    212.112.7.0/24 iS directly connected.VLANl20
212.11 2.37.0/30 iS subneaed.1 subnets
C    212.112.37.16 iS directly connected.VLANl30
167.1 05.0.O/26 iS subneRed.2subnets
S    167.105.125.128[1/0] via 202.112.7.1
S    167.105.144.192 [1/0] via 202.112.7.1
S*    0.0.0.0/0[1/0] via 202.1 12.41.217
B、Gateway oflast resort is 202.1 12.41.217 to network 0.0.0.0
C    2 1 2.11 2.7.0/24 iS directly connected.FastEthemet2/5
212.112.37.0/30 iS subneRed.1 subnets
C    2 1 2.11 2.37.1 6 iS directly connected.POS3/0
1 67.105.0.0/26 iS subneRed.2 subnets
S    167.105.125.128[1/0] via 202.112.7.1
S    167.105.144.192[1/0] via 202.112.7.1
S*    0.0.0.0/0 n/01 via 202.112.7.1
C、Gateway oflastresortis202.1 12.41.217tonetwork0.0.0.0
C    212.112.7.0/24 iS directly connected.FastEthernet2/5
212.112.37.0/30 is subnened.1 subnets
C    212.112.37.16 iS directly connected.POS3/0
1 67.1 05.0.0/26 is subneRed.2 subnets
S    167.105.125.128[1/0] via 202.112.7.1
S    167.105.144.192[1/0] via 202.112.7.1
S*    0.0.0.0/0[1/01 via 202.112.41.217
D、Gateway oflast resort iS 202.1 12.41.217 to network 0.0.0.0
C    2 12.112.7.0/24 is directly connected.FastEtIlerect2/5
212.112.37.0/30 is subneRed,1 subnets
C    2 1 2.11 2.37.1 6 iS directly connected.POS3/0
1 67.1 05.0.0/26 iS subneRed.2 subnets
S    167.105.125.128[20/0] via 202.112.7.1
S    167.105.144.192 [20/0] via 202.112.7.1
S*    0.0.0.0/0[20/0] via 202.1 12.41.217

答案C

解析 由于静态路由的管理距离为1,而在选项D)中,静态路由的管理距离为20,所以选项D错误。在路由器的端.口FastEthemet2/5和POS3/0都配置有两个网段IP地址,所以在选项A路由表的下面路由信息中,出现VLANl20和VLANl30,就是错误的。
    C212.112.7.0/24 is directly connected,VLANl20
    212.112.37.0/30 is subnetted.1 subnets
    C212.112.37.16 is directly connected,VLANl30
    167.105.0.0/26 is subnetted,2 subnets
    在选项B中,这三条路由信息的下一跳路由地址都是202.112.7.1,而第三路由是默认路由,所以前两条静态路由就是冗余路由。所以选项B错误,而选项C正确。
    S167.105.125.128[I/0]via 202.112.7.1
    S167.105.144.192[1/0]via 202.112.7.1
    S*0.0.0.0/0[I/0]via 202.112.7.1
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