(1) Bandwidth required is different.
(2) Pulse height is different.
(3) Clocking is derived from the data in synchronous transmission.
(4) Clocking is mixed with data in asynchronous transmission.
(5) None of these
Q.2. The transmission signal coding method for T1 carrier is called-
(1) NRZ (2) Bipolar (3) Manchester (4) Binary (5) Flip
Q.3. In a synchronous modem, the digital-to-analog converter sends signal to the
(1) transmission line (2) modulator (3) terminal (4) equalizer (e) host
Q.4. Which section of a synchronous modem contains the scrambler?
(1) Terminal section
(2) Receiver section
(3) Control section
(4) Transmission section
(e) Source Section
Q.5. The loss in signal power as light travels down the fibre is called:
(1) propagation (2) attenuation (3) scattering (4) absorption (e) entropy
Q.6. Multiple repeaters in communication satellites are called
(1) detector (2) modulator (3) transponders (4) stations (5) Node
Q.7. How many bits per symbol are used in the Baudot code?
(1) 5 (2) 7 (3) 8 (4) 9 (5) 4
Q.8. While transmitting odd-parity coded symbols, the number of zeros in each symbol is
(1) odd (2) even (3) unknown (4) both 1 and 2 (e) none of these
Q.9. Which of the following transmission systems provides the highest data rate to an individual device?
(1) Digital PBX (2) Computer Bus (3) LAN (4) Voice band modem (5) Telephone line
Q.10. One important characteristic of LAN is
(1) parallel transmission
(2) low cast access for low bandwidth channel
(3) unlimited expansion
(4) application independent interfaces
(5) None of these
Answers
Q.1.(3) Clocking in synchronous mode
Q.2.(2) Bipolar
Q.3.(4) Equalizer
Q.4.(4) Transmission section
Q.5.(2) Attenuation
Q.6.(3) Transponder
Q.7.(1) 5 bits per symbol
Q.8.(3) unknown
Q.9.(2) computer bus
Q.10.(4) application independent interface
0 comments:
Post a Comment
MAHENDRA GURU