Test: Communication & Congestion Control - Computer Science Engineering (CSE) MCQ
10 Questions MCQ Test - Test: Communication & Congestion Control
Assume that each character code consists of 8 bits. The number of characters that can be transmitted per second through anasynchronous serial line at 2400 baud rate, and with two stop bits is
Purpose of a start bit in RS 232 serial communication protocol is
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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 bytebecause
How many 8-bit characters can be transmitted per second over a 9600 baud serial communication link using asynchronousmode of transmission with one start bit, eight data bits, two stop bits and one parity bit?
A serial transmission T1 uses 8 information bits, 2 start bits, 1 stop bit and 1 parity bit for each character. A synchronoustransmission T2 uses 3 eight-bit sync characters followed by 30 eight-bit information characters. If the bit rate is 1200bits/second in both cases, what are the transfer rates of T1 and T2?
Let us consider a statistical time division multiplexing of packets. The number of sources is 10. In a time unit, a source transmits a packet of 1000 bits. The number of sources sending data for the first 20 time units is 6, 9, 3, 7, 2, 2, 2, 3, 4, 6,1, 10, 7, 5, 8, 3, 6, 2, 9, 5 respectively. The output capacity of multiplexer is 5000 bits per time unit. Then the average number of back logged of packets per time unit during the given period is
On a TCP connection, current congestion window size is Congestion Window = 4 KB. The window size advertised by the receiver is Advertise Window = 6 KB. The last byte sent by the sender is Last Byte Sent = 10240 and the last byte acknowledged by the receiver is Last Byte Acked = 8192. The current window size at the sender is
In the slow start phase of the TCP congestion algorithm, the size of the congestion window
Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the startof the slow start phase is 2 MSS and the threshold at the start of the first transmission is 8 MSS. Assume that a time out occurs during the fifth transmission. Find the congestion window size at the end of the tenth transmission.
Let the size of congestion window of a TCP connection be 32 KB when a timeout occurs. The round trip time of the connection is 100 msec and the maximum segment size used is 2 KB. The time taken (in msec) by the TCP connection to get back to 32 KB congestion window is _________.
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