World of Computer Networking Your CCNA start - Transmission Control Protocol (TCP) Header

The video tutorial explains the TCP three-way handshake and the structure of the TCP header, including fields like source and destination ports, sequence and acknowledgement numbers, and flags. It covers the importance of checksum for security and briefly touches on the urgent pointer and optional fields. The tutorial aims to provide a comprehensive understanding of TCP header components and their functions in establishing reliable connections.

What is the primary purpose of the three-way handshake in TCP?

• To establish a new TCP connection

• To encrypt data during transmission

• To compress data for faster transmission

• To terminate a TCP connection

Which two numbers are crucial for ensuring reliable data transmission in TCP?

• Sequence number and acknowledgment number

• Port number and IP address

• Checksum and urgent pointer

• Window size and header length

What is the role of the window size in a TCP connection?

• To indicate the priority of data segments

• To specify the number of bytes to be acknowledged before sending more data

• To encrypt the data being transmitted

• To determine the size of the TCP header

Which field in the TCP header is similar to the IP version 4 header length?

• Sequence number

• Header length

• Checksum

• Window size

How is the checksum in a TCP header calculated?

• Based on the entire TCP segment and part of the IP header

• Based only on the TCP header fields

• Based on the source and destination IP addresses only

• Based on the data link layer frame

What is the purpose of the urgent pointer in a TCP header?

• To signal that a specific portion of data is important and should be processed first

• To encrypt the data being transmitted

• To specify the length of the TCP header

• To indicate the start of a new TCP connection

What happens if the checksum in a TCP header does not match?

• The TCP segment is encrypted

• The TCP connection is terminated

• The TCP segment is discarded

• The TCP segment is retransmitted