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1111. Data is transmitted character by character in _________.

A. Synchronous mode
B. Asynchronous mode *
C. Remote communication
D. Satellite mode

1112. All of the following are guided communication media except __________.

A. Fiber-optic cable
B. Wire cable
C. Coaxial cable
D. Satellite -based Microwave communication *

1113. Which of the following cable is comprised of two separate insulated copper wires that are twisted ?

A. Fiber optics
B. Twisted pair wire *
C. Coax
D. Submarine

1114. Communication between a computer and keyboard involves______transmission_________.

A. Half duplex
B. Full- duplex
C. Simplex *
D. Automatic

1115. The encoding scheme of data represents as __________.

A. EBCDIC code
B. ASCII code
C. Unicode
D. All of the above *

1116. The ________ is the physical path over which a message travels _______.

A. Single
B. Double
C. Protocol
D. Medium *

1117. Following devices are used in simplex mode _________.

A. Radio
B. Television
C. A and B *
D. Multiplexers

1118. The characteristics of analog carrier waves are ________.

A. Binary numbers
B. Frequency
C. Amplitude
D. B and C *

1119. A fibre-optic cable consists of tubes of _________.

A. Mirror
B. Glass *
C. Rubber
D. Wooden

1120. Wireless modems transmit the data signals through________.

A. Air *
B. Cable
C. Gateway
D. None of the above