Intermediate Topic 21 of 50 Computer Networks
Three-Way Handshake
Exchange establishing a TCP connection.
How it works
TCP opens with SYN, then SYN-ACK, then ACK, synchronizing initial sequence numbers and confirming both sides can send and receive.
Where it is used
Every TCP connection start.
Common pitfall
SYN floods exhaust server state; SYN cookies mitigate them.
Where it fits in the course
Three-Way Handshake is topic 21 of 50 in Computer Networks, rated Intermediate. It follows UDP. The next topic is Flow Control.
Practice and explore
- Open the interactive lesson, with a mini quiz.
- Take the Computer Networks quiz.
How to study this topic
- Read the explanation above and restate the definition in your own words.
- Open the interactive lesson and answer its mini quiz.
- Read the common pitfall, then write a short example that avoids it.
- Check your understanding in the Computer Networks quiz, and revisit the topic if you miss a question.
Frequently asked questions
What is Three-Way Handshake?
Exchange establishing a TCP connection. It belongs to Computer Networks and is an intermediate-level topic.
Where do people use Three-Way Handshake?
Every TCP connection start.
What is the most common mistake with Three-Way Handshake?
SYN floods exhaust server state; SYN cookies mitigate them.
What should I learn before this topic?
Start with UDP, the topic just before it in Computer Networks.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Computer Networks quiz.
Is Three-Way Handshake hard to learn?
It is an Intermediate topic. Be comfortable with the Beginner topics in this area first, then read the common pitfall carefully, since it is where most mistakes happen.
How long does it take to learn Three-Way Handshake?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Three-Way Handshake?
UDP, Flow Control, TCP are closely connected. The full list is in the related topics section of this page.
What should I study after Three-Way Handshake?
Continue with Flow Control, the next topic in Computer Networks.
Related topics
- UDP (Computer Networks)
- Flow Control (Computer Networks)
- TCP (Computer Networks)
- Congestion Control (Computer Networks)
- Three-Address Code (Languages & Compilers)