单项选择题
Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）
A.IETF
B.HDLC
C.Q9333-A Annex A
D.ANSI Annex D
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相关考题
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单项选择题
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）
A.Frame Relay
B.HDLC
C.x.25
D.PPP -
多项选择题
Which two options are valid WAN connectivity methods?（）
A.PPP
B.WAP
C.DSL
D.Ethernet
E.L2TPv3 -
单项选择题
At which layer of the OSI model dose PPP perform?（）
A.Layer 3
B.Layer 4
C.Layer 2
D.Layer 5
