下列是一台Ciseo三层交换机的部分路由表，表中的路由信息完全正确的是( )。-考呗网

网络技术

单选题下列是一台Ciseo三层交换机的部分路由表，表中的路由信息完全正确的是( )。

A． Gateway of last resort is 162.105.1.145 to network 0.0.0.0
O 222.29.2.0/24 [ 110/3 ] via 162.105.1.145,00 : 13:43, Vlan1
O 222.29.32.0/24 [ 110/3 ] via 162.105.1.145,00:13:43, Vlan1
O * E 20.0.0.0/0 [110/1] via 202.112.41.6,00 :15 :10, Vlan1
C 222.105.157.0/24 is directly eonneeted,Vlan157
C 222.105.156.0/24 is directly connected, Vlan30
S 222.105.239.0/25 [1/0] via 202.112.41.6
S 222.105.125.128/26 [1/0] via 202.112.7.1
B． Gateway of last resort is 162.105.1.145 to network 0.0.0.0
O 222.29.2.0/24 [110/3] via 162.105.1.145,00:13:43,Vlan1
O 222.29.32.0/24 [110/3] via 162.105.1.145,00:13:43,Vlan1
O * E 20.0.0.0/0 [110/1] via 162.105.1.145,00 : 15 : 1O,Vlan1
C 162.105.157.0/24 is directly eonnected,Vlan157
C 162.105.156.0/24 is directly eonneeted,Vlan30
S 162.105.239.0/25 [1/0] via vlan157
S 162.105.125.128/26 [1/0] via vlan1
C． Gateway of last resort is 162.105.1.145 to network 0. O.0.0
O 222.29.2.0/24 [115/3] vial 62.105.1.145,00 : 13:43, Vlan1
O 222.29.32.0/24 [115/3] via 162.105.1.145,00:13:43,Vlan1
O * E 20.0.0.0/0 [115/1] via 162.105.1.145,00:15:10,Vlan1
C 162.105.157.0/24 is directly connected, GigbpsEthernet 0/1
C 162.105.156.0/24 is directly connected, GigbpsEthemet 0/2
S 162.105.239.0/25 [1/0] via 202.112.41.6
S 162.105.125.128/26 [1/0] via 202.112.7.1
D． Gateway of last resort is 162.105.1.145 to network O.0.0.0
O 222.29.2.0/24 [110/3] via 162.105. i.145,00 : 13:43, Vlan1
O 222.29.32.0/24 [110/3] via 162.105.1.145,00 : 13:43,V1an1
O * E 20.0.0.0/0 [110/1] via 162.105.1.145,00:15:10,V1an1
C 162.105.157.0/24 is directly eonneeted,Vlan157
C 162.105.156.0/24 is directly eonnected,Vlan30
S 162.105.239.0/25 [1/0] via 202.112.41.6
S 162.105.125.128/26 [1/0] via 202.112.7.1

参考答案：D进入在线模考

A选项中，根据“Gateway of last resort is 162．105．1．145 to network 0．0．0．0”知，到达0．0．0．0网络经过162．105．1．145端口，而从“0 * E20．0．0．0／0[110／1]via 202．112．41．6，00：15：10，Vlanl”语句中却是经过202．112．41．6端口，故A选项错误。
B选项中，“S 162．105．239．0／25[1／0]via vlan 157、S l62．105．125．128／26[1／0]via vlanl”两行via关键字后面缺少端口号或者端口名称，故B选项错误。
C选项中，字母O代表的是OSPF协议，其管理距离是110，而题目中给出的却是115，故C选项错误。

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A． Router(config) #access-list 98 permit icmp 137.189.11.00. O. O.255 any
Router(config) #access-list 98 permit icmp 211.68.69.00.0.0.63 any
Router(config) #access-list 98 deny iemp any any
Router(config)#aeeess-list 98 permit ip any any
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C． Router(config) #access-list 999 permit icmp 137.189.11.00.0.0.255 any
Router(config) #access-list 999 permit icmp 211.68.69.00.0.0.63 any
Router( config)#access-list 999 permit ip any any
Router( config)#access-list 999 deny icmp any any
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Router( config-if)#ip access-group 999 in
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D． Router (config) #access-list 199 permit icmp 137.189.11.00.0.0.255 any
Router(corrfig) #access-list 199 permit icmp 211.68.69.00.0.0.63any
Router(config)#access-list 199 deny icmp any any
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2在Cisco路由器上执行一条命令后得到下列信息
Routing Protocol is "rip"
Sending update severy 30 seconds, next due in 16 seconds
Invalid after 180 seconds, holddown 180,flushed after 240
Out going update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing : rip
Routing for Networks:
202.112.7.0
202.112.7.0
Passive Interface (s):
Ethernet0
Routing Information Sources:
Gateway Distance Last Update
202.112.7.321204w4d
Distance: ( default is 120 )
那么该路由器执行的命令是( )。

A．Router # show configuration
B． Router # show flash
C． Router # show ip protocols
D． Router # show ip route

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3如下图所示，主机A发送数据包给B，在数据包经过路由器转发的过程中，下列封装在数据包4中的目的IP地址和目的MAC地址是( )。

A．121．194．0．100e0．6687．8d00
B．121．194．0．200e0．bcf1．ab14
C．211．68．69．2540006．f150．4900
D．211．68．69．25400e0．bcf1．ab14

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