UDP supports all media internet transfers. For years no one had a use for the User Datagram Protocol, but now it is the star of entertainment apps.

Xinetd is a guardian that manages access to your computer from the internet. It is a daemon that runs all the time and listens on all of the ports for connection or service requests.

You can get details of the packets traveling around your network by using the tcpdump utility. Find out the commands of this handy tool.

Cisco routers have a SHOW command built into the operating system. This command has many options and can help you manage your router.

SNMP lies at the heart of most network monitoring tools. The trap provides an alerting mechanism. Find out more about this useful system.

ICMP was created along with the internet. This straightforward error reporting system turned out to have some very useful utilities.

Being a network administrator gives you lots of control and also gets you a lot of opportunities to travel. Find out how to get in on this great job.

SSH is a security system for network and internet connections. You may already have SSH built into your computer’s operating system.

If you enjoy using PuTTY, you’re in for a surprise. There are much better alternatives available. Find out about 30 terminal emulators.

In this article we take a look at the CCNA Routing and Switching and CCNAX exam paths. Includes a break down of the topics and costs of each path.