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Free computer quiz Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. The physical layer of a network
(a)
Constructs packets of data and sends them across the network
(b)
Controls error detection and correction
(c)
Defines the electrical characteristics of signals passed between the computer and communication devices
(d)
None of these
2. Different computers are connected to a LAN by a cable and
(a)
Telephone lines
(b)
Special wires
(c)
Interface card
(d)
Modem
3. What frequency range is used for micro-waves communication, satellite and radar?
(a)
Extremely high frequency : 30,000 MHz
(b)
Super high frequency : 3000 MHz to 30000 MHz
(c)
Medium frequency : 300 kHz to 3 MHz
(d)
Low frequency : 30 kHz to 300 kHz
4. A machine that connects two or more electronic mail systems and transfer mail messages among
(a)
Bridges
(b)
User agent
(c)
Gateways
(d)
Mail gateway
5. The main purpose of a data link content monitor is to
(a)
Detect problems in protocols
(b)
Measure bit error rates
(c)
Determine the type of transmission used in a data link
(d)
Determine the type of switching used in a data link
6. The application layer of a network
(a)
consists of software being run on the computer connected to the network
(b)
Establishes, maintain and terminates virtual circuits
(c)
Defines user’s port into the network
(d)
None of these
7. Which of the following protocol allows an application program on one machine to send a datagram to an application program on another machine?
(a)
SMTP
(b)
VMTP
(c)
X.25
(d)
UDP
8. How does packet Burst affect network performance?
(a)
It helps in secure communication
(b)
It helps in error control
(c)
It increases network bandwidth
(d)
It increases speed at which packets are distributed
9. The residual error rate is the
(a)
Probability that one or more errors will be detected when an error detection mechanism is used
(b)
Signal to noise ratio divided by the ratio of energy per bit to noise per hertz
(c)
Number of bit errors per twenty four hours of continuous operation on an asynchronous line
(d)
Probability that one or more errors will be undetected when an error detection scheme is used
10. Fibre optics have maximum segment
(a)
100m
(b)
200m
(c)
500m
(d)
2000m
