[ 单选题 ] (3分) End system does not include ( ). ( )(3.0)
A. router
B. smart phone
C. PCs
D. Web servers
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[ 单选题 ] (3分) The original reason for the Internet to use packet switching is ( ). ( )(3.0)
A. Statistical multiplexing enables efficient sharing of expensive long-haul links.
B. Packet switching enables data to be routed faster than circuit switching.
C. It is less work for a router to process a packet than to process the data in a circuit.
D. Packet switching requires simpler hardware on the routers than circuit switching.
[ 单选题 ] (3分) By which of the following access technology, bandwidth is not shared among the users? ( )(3.0)
A. WiFi
B. HFC
C. ADSL
D. None of the above
MAC broadcast address is ( ).
A. FF-FF-FF-FF-FF-00
B. 255.255.255.255
C. FF-FF-FF-FF-FF-FF
D. 255.255.255.0
What is stored in the ARP table of the Internet host? ( )
A. IP addresses
B. MAC addressses
C. the mapping of domain names to IP addressses
D. the mapping of IP addresses to MAC addressses
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