多项选择题
As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the devicE.For what two reasons can this happen? （）
A.The data is moving from 10BASE-TX to 100BASE-TX.
B.The WAN encapsulation type has changed.
C.The data format has changed from analog to digital.
D.The source and destination hosts are in the same subnet.
E.The source and destination MAC addresses have changed.
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相关考题
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单项选择题
Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled（）。
A.Set the SSID value in the client software to public.
B.Configure open authentication on the AP and the client.
C.Set the SSID value on the client to the SSID configured on the AP.
D.Configure MAC address filtering to permit the client to connect to the AP. -
多项选择题
At which layers of the OSI model do WANs operate (Choose two.)（）。
A.application layer
B.session layer
C.transport layer
D.network layer
E.datalink layer
F.physical layer -
多项选择题
Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN (Choose three.)（）。
A.HDLC
B.Ethernet
C.Token Ring
D.PPP
E.FDDI
F.Frame Relay
