Which is not a application layer protocol?
Options:
A. HTTP
B. SMTP
C. FTP
D. TCP
The Correct Answer Is:
- D. TCP
The Transmission Control Protocol is known as TCP. A transport layer protocol facilitates packet transmission from source to destination. The protocol is connection-oriented, which means it establishes a connection between computing devices before a communication occurs between them. This protocol is used with an IP protocol, so together, they are referred to as a TCP/IP.
The main function of TCP is to receive data from the application layer. It then divides the data into several packets, assigns numbers to these packets, and finally sends the packets to the destination. While the TCP reassembles the packets and transmits them to the application layer, the Internet Protocol is responsible for reassembling the packets. Due to the fact that TCP is a connection-oriented protocol, the connection will remain established until the communication between the sender and receiver is completed.