Compare SMTP and HTTP.
smtp-http • 1.4k  views
Parameter SMTP HTTP
Port number 25 80
Type of band transfer Inband Inband
Type of Protocol Push protocol (primarily) Pull protocol (mainly)
Type of transfer Transfers mails via mail services Transfers files between web server and web client
Number of TCP connections 1 1
Type of TCP connection Persistent Can use both persistent and non persistent
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