The internet relies on a system of addresses that treats every computer, tablet and smartphone as a distinct device, allowing all of them to communicate with each other. Because many kinds of devices ...

An Internet Protocol address is a number that identifies a device in a network, though the term is often used to refer to a device on the Internet itself. An IP address is vital for transferring data ...

The numeric identification of the upper layer protocol that an IP packet should be sent to. The number is stored in the header that is prefixed to an IP packet. Note that the IP protocol number is not ...

In this tutorial we will discuss the concept of Ports and how they work with IP addresses. If you have not read our article on IP addresses and need a brush up, you can find the article here. If you ...

You’ve heard about it before: an unknown online assailant has been inundating someone in your town with bothersome messages. Luckily, even though that person’s profile may be devoid of identifying ...

6 Types of Network Address Translation: Which One to Use? Your email has been sent Even though we’re no longer running out of IP addresses, Network Address Translation still plays a vital role. Learn ...

Why you need to know Cisco IOS ACL port numbers Your email has been sent What’s a port number? What does this have to do with the Cisco IOS? When do I need to know a port number? Summary When working ...

Netstat, the TCP/IP networking utility, has a simple set of options and identifies a computer’s listening ports, along with incoming and outgoing network connections. This data can be very helpful if ...