Simple mail transfer protocol (SMTP) utilizes _________ as the transport layer p

Simple mail transfer protocol (SMTP) utilizes _________ as the transport layer protocol for electronic mail transfer.

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1) Which of the following is a correct format of Email address?

2) Typically the TCP port used by SMTP is

3) There are Four Scenarios in

4) A session may include

5) At beginning of Internet era, messages sent by electronic mail were short and consisted of