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Free computer quiz Online Test - MeritNotes
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No. of Questions :10
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1. RS-232-C
(a)
is an interface standard between data terminal equipment and data circuit terminating equipment
(b)
specifies only the mechanical characteristics of an interface by providing a 25-pin connector
(c)
is an interface between two data circuit terminating equipment as exemplified by a local and remote modem
(d)
requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
2. Carrier is
(a)
A collection of interconnected functional units that provides a data communications service among stations to the network
(b)
The condition when two or more sections attempt to use the same channel at the same time
(c)
A continuous frequency capable of being modulated or impressed with a second signal
(d)
One or more conductors that serve as a common connection for a related group of devices
3. How many digits of the DNIC (Data network identification code) identify the country?
(a)
First three
(b)
First four
(c)
First five
(d)
First six
4. Local area networks can transmit
(a)
Faster than telecommunication over public telephone lines
(b)
Slower than telecommunication over public telephone lines
(c)
Using twisted-pair wiring or coaxial cables
(d)
Both (a) and (c)
5. Satellite switched Time-Division multiple Access (SS/TDMN) is
(a)
A form of TDMA in which act switching is used to dynamically change the channel assignments
(b)
A medium access control technique for multiple access transmission media
(c)
Method of determining which device has access to the transmission medium at any time
(d)
All of these
6. Which of the following device is used with an X.25 network to provide service to asynchronous terminals?
(a)
Packet assembled
(b)
Gateway
(c)
Bridges
(d)
Repeater
7. Many low-speed channels are interwoven into one high-speed transmission by
(a)
Frequency-division multiplexer
(b)
Time-division multiplexer
(c)
Both (a) and (b)
(d)
None of these
8. Slotted ALOHA
(a)
Require global time synchronization
(b)
Divide time into discrete intervals
(c)
Both (a) and (b)
(d)
None of these
9. What is the name of the computer based EMMS that provides a common forum where users can check it at their convenience, post message, activity exchange ideas and participate in ongoing discussions?
(a)
Video conferencing
(b)
Tele conferencing
(c)
Bulletin Board system (BBS)
(d)
E-mail
10. Pure ALOHA
(a)
Require global time synchronization
(b)
Does not require global time synchronization
(c)
Both (a) and (b)
(d)
None of these