In geosynchronous orbit, satellite
A. remains in a fixed position so that as earth rotates, it can fully cover the earth
B. remains in a fixed position related to points on earth
C. moves faster than the earth's rotation so that it can cover larger portion of earth.
D. moves simultaneously
E. None of the above
Answer: Option A
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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