多项选择题

On a Cisco network, which of the following modes of flow control are commonly used to mitigate the effects of busy data networks?（）

A. Source Quench.
B. Learning.
C. Buffering.
D. Windowing.
E. Cut-Through.

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多项选择题

After replacing the NIC card of a PC on the LAN, your Cisco switch shows a new MAC address is attached to that port. Which of the following answer choices below correctly describe a MAC address?（）

A. It is a globally unique IP address.
B. It is a globally unique 48 bit address
C. It is provided by the manufacturer of the NIC.
D. It is used as part of the IPX/SPX configuration.
E. It is a logical address.

多项选择题

Which of the following correctly describe the various functions and virtues of a router?（）

A. Packet switching
B. Collision prevention on a LAN segment.
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internetwork communication