题目内容

—_____ this your bag?

A. Yes,________
B. Is; it’s
C. Is; it is
Do; it do

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The () layer of the OSI model organizes bits from the physical layer into logical data units called frames.

A. physical
B. data-link
C. network
D. transport

() is a protocol used for transferring files.

A. FTP
B. SMTP
C. TELNET
D. HTTP

() is a protocol that can access and transfer documents on the WWW.

A. FTP
B. SMTP
C. TELNET
D. HTTP

The transport layer protocol of TCP/IP is called ().

A. TCP
B. UDP
C. IP
D. a and b

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