Question

What is a TCP half-open connection in the context of connection establishment using 3-way handshake?
a. The first transaction in the 3-way handshake does not complete.
b. The second transaction in the 3-way handshake does not complete.
c. The last transaction in the 3-way handshake does not complete.
d. None of these.

Answer 1

Answer:

Actually, the correct option for this answer should be "None of these" i.e. option "D".

Explanation:

The T.C.P. half open connection uses a mechanism by which as soon as a person wants to connect to the server, he/she has to first complete binding and undergo the stage of "passive open".

After this, the overall mechanism is enabled in three way handshake.

This finally results  into establishment of connection with the server.

It is also known as T.C.P. socket connection.

The 4 way handshake is used when a person wants to close the connection.

T.C.P. is the abbreviated form for transmission control protocol.

Answer 2

Answer:

None of these (D)  is the right option.

Explanation:

Let us understand what actually a 3-way hand shake is

The server always waits for the request from the client. Once the client want to establish a connection, it first passes SYNC to the server. Once the server receives the SYNC, it sends an SYNC ACK to the client.

The client once receiving the SYNC ACK, it then sends one more ACK stating that it has received the SYNC.

These 3 step process is called 3-way hand shake. The connections gets entirely established, only when all the three steps are done successfully.