Why TCP provides reliable delivery in Computer Networks - Quick Recap

Recall & Review

beginner

What does TCP stand for and what is its main purpose?

TCP stands for Transmission Control Protocol. Its main purpose is to provide reliable, ordered, and error-checked delivery of data between applications over a network.

beginner

How does TCP ensure data is delivered in order?

TCP assigns sequence numbers to each byte of data. The receiver uses these numbers to reorder segments if they arrive out of order, ensuring data is processed in the correct sequence.

beginner

What role do acknowledgments (ACKs) play in TCP's reliability?

The receiver sends back acknowledgments (ACKs) to confirm receipt of data. If the sender does not receive an ACK, it retransmits the data, ensuring no data is lost.

intermediate

Explain how TCP handles lost or corrupted data packets.

TCP uses checksums to detect errors in data. If data is lost or corrupted, the sender does not receive an acknowledgment and will resend the data until it is correctly received.

intermediate

What is the purpose of TCP's flow control?

TCP's flow control prevents the sender from overwhelming the receiver by controlling the rate of data transmission based on the receiver's capacity.

What mechanism does TCP use to ensure data is received correctly?

A Acknowledgments and retransmissions

B Broadcasting data to all devices

C Ignoring lost packets

D Sending data without sequence numbers

TCP uses acknowledgments to confirm receipt and retransmits data if acknowledgments are not received.

How does TCP detect errors in transmitted data?

A Using IP addresses

B Using encryption

C Using checksums

D Using port numbers

TCP uses checksums to detect errors in data packets.

What happens if a TCP segment arrives out of order?

A TCP sends the segment back to the sender

B TCP discards the segment

C TCP ignores the order

D TCP reorders the segments using sequence numbers

TCP uses sequence numbers to reorder segments so data is delivered in the correct order.

Why does TCP use flow control?

A To encrypt data

B To prevent the sender from sending data too fast for the receiver

C To assign IP addresses

D To broadcast data

Flow control helps TCP avoid overwhelming the receiver by controlling data transmission speed.

What does TCP do if it does not receive an acknowledgment for sent data?

A Retransmits the data

B Stops the connection

C Sends a warning message

D Ignores the missing acknowledgment

If no acknowledgment is received, TCP retransmits the data to ensure reliable delivery.

Describe the key methods TCP uses to provide reliable data delivery.

Think about how TCP knows data arrived correctly and in order.

Explain why TCP is considered a reliable protocol compared to others like UDP.

Focus on the features TCP has that UDP lacks.