Data packets travel to and from numbered network ports associated with particular IP addresses and endpoints, using the TCP or UDP transport layer protocols. All ports are potentially at risk of ...

Ever look at the back of your router and ask yourself “WHY!?!?” There are only four ethernet ports there. Four. How can anyone live and thrive with such a measly amount of wired network connections?

Describe the various call types in a VoIP network. Configure analog voice interfaces as new devices are introduced into the voice path. Configure dial peers so you can add call routing intelligence to ...

Editors' note: This post is part of a regularly updated series. For the other parts, check out the related stories below. All home networks start with a network cable. Even if you plan on using all ...

If you're looking for a way to discover which ports are standing wide open on network machines, read about a powerful cross-platform solution that will do the trick. Editor’s note on June 4, 2015: ...