Question 1 of 25
Hints left: 3
Q1
Unmodulated signal coming from a transmitter is know as
Q2
How many Character per sec(7bits + 1parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 "Start" and 1 "stop" bit)?
Q3
Data communications system depends on four fundamental characteristics
Q4
The number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self connection is
Q5
Which of the following ISO level is more closely related to the physical communications facilities?
Q6
Error detection at the data link level is achieved by
Q7
Maximum data rate of a channel for a noiseless 3-kHz binary channel is
Q9
A high speed communication equipment typically would not be needed for
Q11
Which network has connectivity range up to 10 meters?
Q12
Correct method for full duplex mode of communication is:
Q13
The Network topology that supports bi-directional links between each possible node is
Q14
Which one of the following network uses dynamic or adaptive routing?
Q15
Which of the following is a wrong example of network layer?
Q16
A terminal multiplexer has six 1200 bps terminals and 'n' 300bps terminals connected to it. The outgoing line is 9600bps. What is the maximum value of n?
Q17
Start and stop bits are used in serial communication for
Q18
In session layer, during data transfer, the data stream responsible for the "control" purpose (i.e control of the session layer itself) is
Q19
For data communications to occur, the communicating devices must be part of a communication system made up of a combination of?
Q20
The topology with highest reliability is:
Q21
which of the following is not a field in the Ethernet Message packet?
Q23
The ________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.
Q24
The method of communication in which transmission takes place in both directions, but only one direction at a time is called
Q25
In a broad Sense, a railway track is an example of