Which Transmission Control Protocol (TCP) flag is used to make sure the receiving end knows to examine the sequence number field? PSH RST SYN FIN

The Transmission Control Protocol (TCP) flag that is used to make sure the receiving end knows to examine the sequence number field is SYN.

Here's a step-by-step explanation:

1. TCP is a connection-oriented protocol, which means it establishes and maintains a network conversation through which application programs can exchange data.

2. TCP provides reliable, ordered, and error-checked delivery of a stream of bytes between applications running on hosts communicating over an IP network.

3. Major internet applications such as the World Wide Web, email, remote administration, and file transfer rely on TCP.

4. TCP flags are used within TCP packet transfers to indicate a particular TCP control process.

5. The SYN flag is one of six main flags in TCP. It is used to synchronize sequence numbers to initiate a TCP connection.

6. When the SYN flag is set, it means the sender is requesting a connection and the sequence number field should be examined by the receiver to coordinate and acknowledge the amount of data that can be transmitted before an acknowledgment is returned.

7. Therefore, the SYN flag is used to make sure the receiving end knows to examine the sequence number field.