A.PSK
B.AH
C.MD5
D.ESP

A. 802.1d
B. VTP
C. 802.1q
D. STP
E. SAP

A.telnet access does not require a password
B.nat
C.no broadcast
D.chanage of destination address in the ipv6 header
E.chanage of source address in the ipv6 header
F.autoconfiguration

A.to map a known DLCI to an IP address
B.to map a known IP address to a MAC address
C.to map known SPID to a MAC address
D.to map a known DLCI to a MAC address
E.to map a known IP address to a SPID
F.to map a known MAC address to an IP address

A.它指定VLAN999轉(zhuǎn)發(fā)未做標記的流量。
B.它阻止VLAN999轉(zhuǎn)發(fā)主干的流量。
C.它創(chuàng)建了一個VLAN999接口。
D.它指定VLAN999作為默認為所有未知標記的流量。