It would save me a lot of memorization

What of these services commonly use TCP port 25?

A) FTP (data)



D) FTP (control)

E) Let’s run everything through tcp/25!

The answer: C) SMTP

The Simple Mail Transfer Protocol is used to transfer mail between mail systems, and it’s common to configure an SNMP location in a standalone mail client for outgoing mail.

Want to know more? Watch “Common Ports.”

The fundamental languages used over our computer networks are a standard set of protocols that are used around the world. In this video, you’ll learn about protocols and the set of standards associated with TCP/IP. You’ll also learn the essentials of TCP/IP and how subnetting can be used to build today’s modern networks.