CIR设备在GSM-R模式下的数据通信采用UDP方式，UDP的端口号为20000（）

UDP数据报首部不包含（ ）。

A．UDP源端口号

B．UDP校验和

C．UDP目的端口号

D．UDP数据报首部长度

A．IP源地址

B．IP目的地址

C．UDP源端口号

D．UDP目的端口号

A．IP源地址

B．IP目的地址

C．UDP源端口号

D．UDP目的端口号

A．IP源地址

B．IP目的地址

C．UDP源端口号

D．UDP目的端口号

A．数据检测请求

B．自动确认

C．自动签收

D．手动签收

BGP协议使用______

A、IP，协议号179

B、UDP，520端口

C、UDP，89端口

D、TCP，179端口

拒绝转发所有IP地址进与出方向的、端口号为1434的UDP和端口号为4444的TCP数据包，下列正确的access-list配置是

A）Router (config)#access-list 30 deny udp any any eq 1434

Router (config)#access-list 30 deny tcp any any eq 4444

Router (config)#access-list 30 permit ip any any

B）Router (config)#access-list 130 deny udp any any eq 1434

Router (config)#access-list 130 deny tcp any any eq 4444

Router (config)#access-list 130 permit ip any any

C）Router (config)#access-list 110 deny any any udp eq 1434

Router (config)#access-list 110 deny any any tcp eq 4444

Router (config)#access-list 110 permit ip any any

D）Router (config)#access-list 150 deny udp ep 1434 any any

Router (config)#access-list 150 deny tcp ep 4444 any any

Router (config)#access-list 150 permit ip any any

拒绝转发所有IP地址进与出方向的、端口号为1434的UDP和端口号为4444的TCP数据包，下列正确的access-list配置是

A.Router (config)#access-list 30 deny udp any any eq 1434 Router (config)#access-list 30 deny tcp any any eq 4444 Router (config)#access-list 30 permit ip any any

B.Router (config)#access-list 130 deny udp any any eq 1434 Router (config)#access-list 130 deny tcp any any eq 4444 Router (config)#access-list 130 permit ip any any

C.Router (config)#access-list 110 deny any any udp eq 1434 Router (config)#access-list 110 deny any any tcp eq 4444 Router (config)#access-list 110 permit ip any any

D.Router (config)#access-list 150 deny udp ep 1434 any any Router (config)#access-list 150 deny tcp ep 4444 any any Router (config)#access-list 150 permit ip any any

拒绝转发所有IP地址进与出方向的、端口号为1434的UDP和端口号为4444的TCP数据包，下列正确的access-list配置是（）（）A.Router (config)#access-list 30 deny udp any any eq 1434Router (config)#access-list 30 deny tcp any any eq 4444Router (config)#access-list 30 permit ip any anyB.Router (config)#access-list 130 deny udp any any eq 1434Router (config)#access-list 130 deny tcp any any eq 4444Router (config)#access-list 130 permit ip any anyC.Router (config)#access-list 110 deny any any udp eq 1434Router (config)#access-list 110 deny any any tcp eq 4444Router (config)#access-list 110 permit ip any anyD.Router (config)#access-list 150 deny udp ep 1434 any anyRouter (config)#access-list 150 deny tcp ep 4444 any anyRouter (config)#access-list 150 permit ip any any

拒绝转发所有IP地址进与出方向的、端口号为1434的UDP和端口号为4444的TCP数据包，下列正确的access-list配置是______。

A) Router(config)#access-list 30 deny udp any any eq 1434

Router(config)#access—list 30 deny tcp any any eq 4444

Router(config)#access-list 30 permit ip any any

B) Router(config)#access-list 130 deny udp any any eq 1434

Router(config)#access-list 130 deny tcp any any eq 4444

Router(config)#access-list 130 permit ip any any

C) Router(config)#access-list 110 deny any any udp eq 1434

Rouler(config)#access-list 110 deny any any tcp eq 4444

Router(config)#access-list 110 permit ip any any

D) Router(config)#access-list 150 deny udp ep 1434 any any

Router(config)#access-list 150 deny tcp ep 4444 any any

Router(config)#access-list 150 permit ip any any

A．

B．

C．

D．