TCP connection termination (four-way handshake) in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the first step in TCP connection termination.

Computer Networks

The first step in TCP connection termination is when the client sends a [1] flag to the server.

Drag options to blanks, or click blank then click option'

AFIN

BACK

CSYN

DRST

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing FIN with SYN flag

Thinking ACK starts termination

The client initiates connection termination by sending a FIN flag to the server, indicating it wants to close the connection.

2fill in blank

medium

Complete the code to describe the second step in TCP connection termination.

Computer Networks

After receiving the FIN flag, the server responds with a [1] flag to acknowledge the request.

Drag options to blanks, or click blank then click option'

APSH

BFIN

CACK

DSYN

Attempts:

3 left

💡 Hint

Common Mistakes

Using FIN instead of ACK

Confusing with SYN flag

The server sends an ACK flag to acknowledge the client's FIN request, confirming it received the termination request.

3fill in blank

hard

Fix the error in describing the third step of TCP connection termination.

Computer Networks

The server sends a [1] flag to the client to indicate it also wants to close the connection.

Drag options to blanks, or click blank then click option'

ASYN

BFIN

CACK

DURG

Attempts:

3 left

💡 Hint

Common Mistakes

Using ACK instead of FIN

Confusing with SYN flag

The server sends a FIN flag to the client to indicate it wants to close its side of the connection as well.

4fill in blank

hard

Fill both blanks to describe the final step in TCP connection termination.

Computer Networks

The client responds with a [1] flag to acknowledge the server's [2] flag, completing the termination.

Drag options to blanks, or click blank then click option'

AACK

BFIN

CSYN

DRST

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up ACK and FIN flags

Using SYN or RST incorrectly

The client sends an ACK flag to acknowledge the server's FIN flag, completing the four-way handshake termination process.

5fill in blank

hard

Fill all three blanks to complete the summary of the TCP four-way handshake termination sequence.

Computer Networks

Step 1: Client sends [1] flag. Step 2: Server replies with [2] flag. Step 3: Server sends [3] flag.

Drag options to blanks, or click blank then click option'

AFIN

BACK

CSYN

DRST

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing SYN with FIN

Mixing ACK and FIN order

The correct sequence is: Client sends FIN, server replies with ACK, then server sends FIN to close its side.