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多项选择题
A.amount of RAM
B.bridge priority
C.IOS version
D.IP address
E.MAC address
F.speed of the links
单项选择题
A.dataintegrity
B.encryption
C.keyexchange
D.authentication
多项选择题
A.FTP
B.Telnet
C.SMTP
D.DNS
E.HTTP
F.POP3
多项选择题
A.192.168.20.29
B.192.168.20.16
C.192.168.20.17
D.192.168.20.31
E.192.168.20.0
多项选择题
A.255.255.255.0
B.255.255.255.128
C.255.255.252.0
D.255.255.255.224
E.255.255.255.192
F.255.255.248.0