Error detecting code is
A. an error-detecting code based on a summation operation performed on the bits to be checked
B. a check bit appended to an array of binary digits to make the sum of all the binary digits.
C. a code in which each expression conforms to specify rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
D. the ratio of the data units in error to the total number of data units
E. None of the above
Answer: Option C
A. Agreements on how communication components and DTE
B. Logical communication channels used for transferri
C. Physical communication channels used for transferr
D. None of the above
A. Simplex
B. Four wire circuit
C. Full Duplex
D. Half Duplex
Error detection at the data link level is achieved by
A. Bit Stuffing
B. Cyclic Redundancy Code
C. Hamming Code
D. Equalization
Which of the following is a wrong example of network layer?
A. Internet Protocol (IP) - ARPANET
B. X.25 Packet Level Protocol (PLP)-ISO
C. Source routing and domain naming-USENet
D. X.25 level 2-ISO
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