A.data integrity
B.encryption
C.key exchange
D.authentication

A.ip default-gateway 0.0.0.0
B.ip route 172.16.2.1 0.0.0.0 0.0.0.0
C.ip default-network 0.0.0.0
D.ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E.ip route 0.0.0.0 0.0.0.0 172.16.2.1

A.point-to-point
B.broadcast multi-access
C.nonbroadcast multi-access
D.nonbroadcast multipoint
E.broadcast point-to-multipoint

A.NVRAM
B.RAM
C.FLASH
D.ROM
E.PCMCIA

A.copy running-config: TFTP
B.copy TFTP: running-config
C.copy TFTP: startup-config
D.copy startup-config: TFTP

A.SW1#shows withport port-security interface FastEthernet0/12
B.SW1#shows withport port-secure interface FastEthernet0/12
C.SW1#show port-secure interface FastEthernet0/12
D.SW1#show running-config

A.允許125.36.0.0/16網(wǎng)段的主機(jī)使用FTP協(xié)議訪問主機(jī)129.1.1.1；
B.不讓任何主機(jī)使用Telnet登錄；
C.拒絕一切數(shù)據(jù)包通過；
D.僅允許某個(gè)用戶從外部登錄，其他用戶不能這樣做。

A.to control vty access into a router
B.to control broadcast traffic through a router
C.to filter traffic as it passes through a router
D.to filter traffic that originates from the router
E.to replace passwords as a line of defense against security incursions

A.copy running-config startup-config
B.copy startup-config: running-config
C.copy running config startup config
D.copy startup config running config
E.write terminal