Protocols Interview Questions and Answers


What is STLS?

POP uses the Transmission Control Protocol on port number 110. Transmission may
be encrypted using Transport Layer Security (TLS) or Secure Sockets Layer (SSL).
This is negotiated in the POP3 protocol using the STLS command. Some clients and
servers, such as Google Gmail, instead use the deprecated alternate-port method,
which uses TCP port 995 (POP3S).

Posted by:Richards