With explicit ____, an acknowledgment frame (abbreviated ACK) is sent by the receiving device back to the sending device to confirm that the data frame arrived intact.

A. packet generator
B. slot time
C. CRC
D. frame acknowledgment


Answer: D

Computer Science & Information Technology

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An integer p >1 is a _________ number if and only if its only divisors are + 1 and + p.

A) ?prime B) ?composite C) ?indexed D) ?positive

Computer Science & Information Technology

A thread enters the waiting state when ________.

a) it momentarily has no work to perform b) it cannot perform further operations until it receives a signal from another thread c) it must wait for the completion of an I/O request d) all of the above

Computer Science & Information Technology

Luminosity can best be defined as ____________.

a. the perceived light given off by an object b. the light emanating from an object c. the light given off by an object d. all of the above

Computer Science & Information Technology

A packet-____________________ firewall installed on a TCP/IP-based network typically functions at the IP level and determines whether to drop a packet (deny) or forward it to the next network connection (allow) based on the rules programmed into the firewall.

Fill in the blank(s) with the appropriate word(s).

Computer Science & Information Technology