Correct Answer - Option 1 : SMTP
- Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending emails across the Internet. Therefore, SMTP transfers messages from the sender’s mail servers to the recipient’s mail server.
TCP is the transfer layer protocol. Electronic mail function is supported by the transfer layer protocol TCP. TCP is a connection-oriented and reliable transport protocol. Therefore, SMTP transfer messages from the sender’s mail servers to the recipient’s mail servers using TCP
- UDP is an unreliable connectionless-transport layer Protocol used for its simplicity and efficiency in applications where error can be provided by the application layer
- UDP provided process-to-process communication