多項選擇題Which two commands correctly verify whether port security has been configured on port FastEthernet0/12 on a switch？（）

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


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1.多項選擇題下面哪些是ACL可以做到的？（）

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

2.多項選擇題What are two reasons that a network administrator would use access lists (Choose two.)（）。

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

3.單項選擇題Which command is used to copy the configuration from RAM into NVRAM?（）

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

5.多項選擇題當接口運行在RIP-2廣播方式時，它可以接收的報文有（）。

A.RIP-1廣播報文
B.RIP-1組播報文
C.RIP-2廣播報文
D.RIP-2組播報文