0 votes 0 votes Is SMTP connection-oriented or connectionless ? Computer Networks application-layer-protocols + – Subham Nagar asked Nov 13, 2018 Subham Nagar 790 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply goxul commented Nov 13, 2018 reply Follow Share Since SMTP primarily uses TCP, it should be connection oriented. See this: https://stackoverflow.com/questions/16809214/is-smtp-based-on-tcp-or-udp 2 votes 2 votes adarsh_1997 commented Nov 13, 2018 reply Follow Share i thought it is connectionless 0 votes 0 votes Prateek Raghuvanshi commented Nov 19, 2018 reply Follow Share SMTP is connection oriented protocol which uses tcp for reliability,because SMTP is used as MTA(message transfer agent)which is push the message from client1 to mail server .then SMTP again push the message client 1 mail server to client 2 mail server .when message is reached the client 2 mail server then POP3 /IMAP protocol is used to pull the message from mail server to client 2.both protocol uses tcp for reliability of messages. 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes SMTP is a connection-oriented, text-based protocol in which a mail sender communicates with a mail receiver by issuing command strings and supplying necessary data over a reliable ordered data stream channel, typically a Transmission Control Protocol (TCP) connection. Sandy Sharma answered Nov 19, 2018 Sandy Sharma comment Share Follow See all 0 reply Please log in or register to add a comment.