题目内容

The transport-layer protocol provides logical communication between ____, and the network-layer protocol provides logical communication ____.

A. hosts, processes
B. processes, hosts
C. threads, processes
D. processes, threads

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To implement the multicast services the Internet employs the ____ protocol.

A. FTP
B. TCP
C. IGMP
D. UDP

If an application developer chooses ____ protocol, then the application process is almost directly talking with

A. HTTP
B. RIP
CSMA/CD
D. UDP

____ maintains connection-state in the end systems. This connection state includes receive and send buffers, congestion-control parameters, and sequence and acknowledgment number parameters.

A. UDP
B. TCP
C. DNS
D. HTTP

The host that initiates the session in the Internet is labeled as ____.

A. server
B. user agent
C. client
D. router

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