(A) A switched circuit is a dail up circuit may encounter blockage
(B) Non switched leased line supports higher data volume and quality then switched lines
(C) Non switched lines are expensive for high volume data
(D) Both a and b
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If the data rate of ring is 20 Mbps signal propagation speed is 200 m/us then the number of bits that can be placed on the channel of 200 km is:
(A) 2000 bits
(B) 20000 bits
(C) 1000 bits
(D) none of the above
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In a broad sence a railway track is an example of:
(A) simplex
(B) half-duplex
(C) full-duplex
(D) all of the above
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The network topology that supports bi-directional links between each possible node is:
(A) ring
(B) star
(C) tree
(D) mesh
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Which of the following is not a field in Eathernet message packet:
(A) Type
(B) Data
(C) Pin-code
(D) Address
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Which of the following ISO level is more closely related to the physical communication facilities:
(A) Application
(B) Session
(C) Network
(D) Data link
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A high speed communication equipment typically would not be needed for:
(A) E-mail
(B) Transfering large volume of data
(C) supporting communication between noded in LAN
(D) all of the above
-
Which of the following is not a Standard RS-232C signal:
(A) RTS
(B) CTS
(C) DSR
(D) VDR
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The average code length of the given problem is:
(A) 2
(B) 2.25
(C) 2.45
(D) 3