Which default ports should you open in your firewall to allow encrypted web browsing and outgoing email?
A) tcp/80 and tcp/25
B) tcp/25 and tcp/110
C) tcp/443 and tcp/110
D) tcp/443 and tcp/25
E) OPEN ALL THE PORTS
The answer: D) tcp/443 and tcp/25
Encrypted web communication is usually seen over TCP port 443, and outgoing email uses Simple Mail Transfer Protocol (SMTP) over TCP port 25.
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.