engineering recuitment NIC NIELIT Scientist B 2023 Mock Test Computer Networks Application Layer Protocols SMTP
Consider the following statements about electronic mail:
S1: When both sender and receiver are connected to the mail server via a LAN or a WAN, we need two user agents, two message transfer agents and message access agents.
S2: SMTP can be used in all message transfer phases (connection establishment, mail transfer and connection termination) to put the messages from the client to the server and to get back the messages from the server to the client.
S3: SMTP is a push protocol and POP3 is a pull protocol.
Which of the above statement/s is/are TRUE?
1
S3 only
2
S1 and S2
3
S1 and S3
4
S1,S2 and S3