System Administrator 2026 — Test 50

Correct Answer: A. A. Stream of bytes
Explanation: TCP provides stream oriented delivery between hosts communicating via an IP network and there are no message boundaries. TCP can concatenate data from a number of send () commands into one stream of data and still transmit it reliably.

Correct Answer: B. B. Buffers
Explanation: A TCP receiver has a receive buffer that is used to store the unprocessed incoming packets in case the sender is sending packets faster than the processing rate of the received packets.

Correct Answer: C. C. Segment
Explanation: A segment may be collection of data from many send () statements. TCP transmits each segment as a stream of bytes.

Correct Answer: A. A. Full-duplex
Explanation: Data can flow both the directions at the same time during a TCP communication hence, it is full-duplex. This is the reason why TCP is used in systems that require full-duplex operation such as e-mail systems.

Correct Answer: D. D. Acknowledgment
Explanation: Acknowledgment mechanism is used to check the safe and sound arrival of data. The sender actively checks for acknowledgement from the receiver and once a specific time period has passed, it retransmits the data.

Correct Answer: A. A. Byte number
Explanation: As TCP has to ensure ordered delivery of packets, sequence number and acknowledgement number are used to identify the byte number of the packet in the stream of bytes being transmitted.

Correct Answer: B. B. 10001
Explanation: The sequence number given to first byte of a segment, with respect to its order among the previous segments, is the sequence number of that segment.

Correct Answer: D. D. Sequence of zero’s and one’s
Explanation: One might expect the sequence number of the first byte in the stream to be 0, or 1. But that does not happen in TCP, Instead, the sender has to choose an Initial Sequence Number (ISN), which is basically a random 32 bit sequence of 0’s and 1’s, during the connection handshake.

Correct Answer: C. C. Sequence number of the next byte to be received
Explanation: The acknowledgement field in a segment defines the sequence number of the byte which is to be received next i.e. sequence number of byte that the sender should transmit next.

Correct Answer: A. A. Telnet
Explanation: Telnet is an application layer protocol that provides access to the command-line interface on a remote host. Telnet stands for teletype network.