單項選擇題

Refer to the graphic.Host A is communicating with the seiver. What will be the source MAC address of the frames received by Host A from the server?（）

A.the MAC address of the seiver network interface
B.the MAC address of host A
C.the MAC address of router interface e 1
D.the MAC address of router interface e0


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1.多項選擇題Which of the following correctly describe steps in the OSI data encapsulation process?（）

A.The transport layer divides a data stream into segments and may add reliability and flow control information.
B.The data link layer adds physical source and destination addresses and an FCS to the segment.
C.Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D.Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E.The presentation layer translates bits into voltages for transmission across the physical link.