Bissoy.com
Doctors Medicines MCQs Q&A

In TCP Sliding Window, what would be the value of the receiver window (rwnd) for host X if the receiver, host Y, has a buffer size of 6000 bytes and 2000 bytes of received and unprocessed data?

In TCP Sliding Window, what would be the value of the receiver window (rwnd) for host X if the receiver, host Y, has a buffer size of 6000 bytes and 2000 bytes of received and unprocessed data? Correct Answer 4000 bytes

The correct answer is option 4.

Concept:

A sliding window is used for flow control in the Transmission Control Protocol (TCP). The amount of unacknowledged bytes, x, that one system can communicate to another is determined by the TCP sliding window. The value of x is determined by two factors:

  • The size of the send buffer on the sending system
  • The size and available space in the receive buffer on the receiving system

The given data,

Buffer size = 6000 bytes

Buffer size=2000 bytes

The value of receiver window (rwnd) = 6000 - 2000 = 4000.

Host B can only accept 4000 bytes of data before its buffer overflows. In its next segment to A, Host B promotes this value.

Hence the correct answer is 4000 bytes.

Related Questions

Consider a TCP client and TCP server running on two different machines. After completing data transfer, the TCP client calls close to terminate the connection and a FIN segment is sent to the TCP server. Server-side TCP responds by sending an ACK, which is received by the client-side TCP. As per the TCP connection state diagram (RFC 793), in which state does the client-side TCP connection wait for the FIN from the server-side TCP?
What is the size of window for host A if the value of rwnd is 5000 bytes and the value of cwnd is 2900 bytes?
Suppose two hosts use a TCP connection to transfer a large file. Which of the following statements is/are FALSE with respect to the TCP connection? If the sequence number of a segment is m, then the sequence number of the subsequent segment is always m+1. If the estimated round trip time at any given point of time is t sec, the value of the retransmission timeout is always set to greater than or equal to t sec. The size of the advertised window never changes during the course of the TCP connection. The number of unacknowledged bytes at the sender is always less than or equal to the advertised window.
Consider the following solution to the producer-consumer synchronization problem. The shared buffer size is ?. Three semaphores empty, full and mutex are defined with respective initial values of 0, ? and 1. Semaphore empty denotes the number of available slots in the buffer, for the consumer to read from. Semaphore denotes the number of available slots in the buffer, for the producer to write to. The placeholder variables, denoted by P, Q, R, and S, in the code below can be assigned either empty or full. The valid semaphore operations are: wait ( ) and signal ( ). Producer: Consumer: do {         wait (P) ;         wait (mutex) ;         //Add item to buffer         signal (mutex) ;         signal (Q) ; } while (1) ; do {          wait (R) ;          wait (mutex) ;          //Consume item from buffer          signal (mutex) ;          signal (S) ; } while (1) ;   Which one of the following assignments to P, Q, R and S will yield the correct solution?
The order of a leaf node in a B+ tree is the maximum number of (value, data record pointer) pairs it can hold. Given that the block size is 1K bytes, data record pointer is 7 bytes long, the value field is 9 bytes long and a block pointer is 6 bytes long, what is the order of the leaf node?
Which among the following attempts to read up to count bytes into buffer starting at buffer, returning the number of bytes successfully read? buffer, int offset, int count) c) Void WriteByte(byte value) d) None of the mentioned
Assume that the bandwidth for a TCP connection is 1048560 bits /sec. Let α be the value of RTT in milliseconds (rounded off to the nearest integer) after which the TCP window scale option is needed. Let β be the maximum possible window size with window scale option. Then the values of α and β are
There are flowers in a basket which are to be distributed to five persons standing in a row. The second person received half of the number of flowers given to the first person, the third person received half of the number of flowers received to the second person; the fourth person received half of the number of flowers received to the third person and the fifth person received half of the number of flowers received to the fourth person. If the fifth person received only one flower and there is no flower remaining in the basket, how many flowers were their in the basket?
Consider the following example – Size of Plaintext – 48 bytes. Size of MAC – 20 bytes. Block Length – 8 bytes. How many bytes of padding need to be added to the system?
Consider the three-way handshake mechanism followed during TCP connection establishment between hosts P and Q. Let X and Y be two random 32-bit starting sequence numbers chosen by P and Q respectively. Suppose P sends a TCP connection request message to Q with a TCP segment having SYN bit = 1, SEQ number = X, and ACK bit = 0. Suppose Q accepts the connection request. Which one of the following choices represents the information present in the TCP segment header that is sent by Q to P?