What are the steps involved in the TCP/IP three-way handshake?
What will be an ideal response?
This process has four steps:
1. Host A sends a SYN packet to Host B, which indicates a sequence number represented here as ISNA. The ACK field contains a zero in this first packet.
2. Host B composes an ACK packet for Host A, which acknowledges A's sequence number by adding one to the sequence number that Host A submitted (ISNA+1). This is called an expectational acknowledgment.
3. Host B adds its SYN data for Host A, which indicates its sequence number ISNB, and sends that information to Host A in the ACK packet composed in Step 2.
4. Host A submits an ACK packet to Host B. The packet includes a sequence number of ISNA+1 (expected by Host B) and an acknowledgment number of ISNB+1, which indicates that Host A received the last packet and now expects a sequence of ISNB+1 from Host B.
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