POP 3 UDP or TCP which is it?

Is POP 3 UDP or TCP or both how does Cisco see it?
Todd's book has it as UDP.
http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

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Comments

mikej412

From my UNIX network protocol programming days I only remember it being TCP -- no connection, no POP server.

But I think Apple did something with UDP for SSL POP mail.... so I'd guess Todd uses a Mac to write his books.

Goldmember

http://en.wikipedia.org/wiki/Post_Office_Protocol

POP3 TCP over port 110

according to wikipedia

tech-airman

kadshah wrote:

Is POP 3 UDP or TCP or both how does Cisco see it?
Todd's book has it as UDP.
http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

kadshah,

According to Cisco...

How Can I Change the POP3 Port Number Used by Cisco E-Mail Manager? wrote:

The well known POP3 port number is TCP port 110 based on RFC 1700.

Source:

How Can I Change the POP3 Port Number Used by Cisco E-Mail Manager? - http://www.cisco.com/en/US/products/sw/custcosw/ps840/products_qanda_item09186a00801a6744.shtml

darkuser

# Joyce K. Reynolds <jkrey&isi.edu>
pop3 110/tcp Post Office Protocol - Version 3
pop3 110/udp Post Office Protocol - Version 3

http://www.faqs.org/rfcs/rfc1939.html