GATE PYQ

Physical Layer

Q21.
A T-switch is used to

Q22.
Bit stuffing refers to

Q23.
Physical topology of FDDI is?

Q24.
Assume that each character code consists of 8 bits. The number of characters that can be transmitted per second through a synchronous serial line at 2400 baud rate, and with two stop bits is

Q25.
What is the bandwidth of the signal that ranges from 40 kHz to 4 MHz?

Q26.
What frequency range is used for microwave communications, satellite and radar?

Q27.
In the waveform (a) given below, a bit stream is encoded by Manchester encoding scheme. The same bit stream is encoded in a different coding scheme in wave form (b). The bit stream and the coding scheme are

Q28.
How many 8-bit characters can be transmitted per second over a 9600 baud serial communication link using asynchronous mode of transmission with one start bit, eight data bits, two stop bits, and one parity bit?

Q29.
Assume that each character code consists of 8 bits. The number of characters that can be transmitted per second through an asynchronous serial line at 2400 baud rate, and with two stop bits is

Q30.
In serial data transmission, every byte of data is padded with a '0' in the beginning and one or two '1's at the end of byte because