Connection Oriented - Uses TCP Three-Way Handshake to establish connection
Once the transmission is done it uses FIN/ ACK to close the connection
Assures delivery of packets through error-handling (data sequencing)
Makes use of checksum
If corrupted data detected the effected packet is retransmitted
Sequence number is used to detect missing data and place data in correct order
TCP Sequence Numbers
SYN packets are used to inform client/ server about the value from which to start counting the packets
The sequence/ acknowledgement numbers are always unique high number
Each packet contains a sequence number and acknowledgement number
In the SYN packet sent to the server the acknowledgement number is set to 0
When the server sends back SYN-ACK it increments the sequence no. by 1 and returns it as the acknowledgement number
The server sends its sequence number to the client in the sequence number field
When client responses to server with ACK it increments the acknowledgement number by 1
Once the sequence numbers are synchronized and the connection is established the packet size (bytes) determines the amount by which the sequence/ acknowledgment number is incremented