Computer Networking

Cisco routers run their own operating system called the IOS, or internetwork operating system. These routers also require a knowledge of the command line interface, CLI, whenever you need to...

The command window in Windows XP can be used to find your IP address. Knowing your IP address is sometimes needed to set up your network or wireless network devices. Follow the steps in this...

Internet Protocol, or "IP" for short, is basically a set of instructions that controls the way data travels over the Internet. Internet Protocol Routing is when data is configured in a way that...

Many broadband users draw Internet Protocol (IP) addresses from a common shared pool that is owned by the provider. These dynamic IP addresses are typically exchanged every 24 hours, meaning that...

An Internet Protocol address, commonly known as the IP address, is a numerical label that is assigned to any device connected in a computer network using an Internet protocol for communication....

The iptables is an application that is used as the basic firewall software of most Linux distributions and also comes as the default packet filtering tool in Linux kernels 2.4.x and 2.6.x. It is a...

These days, network switches have become the core components of enterprise networks. Switches are feature rich and handle critical business functions including routing and switching. Port Security...

The "clear counters" command is useful for resetting interface statistics on a Cisco router. This command is not available on a Cisco PIX firewall. On the PIX, "clear...

Telnet is a program that allows to connect to and communicate with a remote server, sometimes referred to as a telnet server. You can execute the full range of commands on the remote sever using a...

A routing table is a simple file on a computer that lets the computer know how to find other computers. Specifically, it describes the way a packet needs to go to find another node (computer) on...

Microsoft's Windows Vista may be much aligned and have some bad features but when it comes to finding out where wireless networks are, it has some very cool built in features.

Network time protocol (NTP) is a communication method that syncs computers over the network. NTP syncs the time so all computers on the network do not have incorrect clock values. Improper time...

Have you ever wanted to see everything you are connected to??well now is your chance, this process is really simple and you only have to remember a few simple things!Read on to learn

This will explain how to easily retrieve your local IP address for your computer. The local IP address is your computer's ID unique to the PC's local network. The IP address can be found through...

From time to time you will need to know your computer's IP Address. There are two different IP's for your computer if your computer is attached to a router. The first is the internal IP and the...

In this article you will learn how to take advantage of Apple Remote Desktop's (ARD) "Send Unix Command" feature in order to automatically run software updates on all Macs within the...

Traceroute (also known as tracert) is a command that was originally developed for UNIX computers. It allows you to see, step by step, the routers that a packet passes through on the path from your...

Does your Modem keep blocking a listening port from one of your P2P Network, such as BitComet, Kazaa, Emule or limewire. When the modem blocks a listening port in your program it's limiting the...

Nowadays, many electronic features require you to input your computer's internal IP address. This is especially important when making your computer a server, or also when trying to remotely...

Snort is a command line-based intrusion detection tool for the Unix, Linux and Windows operating systems. It is used to perform real-time traffic analysis and packet logging. It can be used to...

SSL uses Certification Authorities (CA) to ensure the integrity of public key encryption. The certification authority verifies the public key of the individual and signs it with a digital...

Telnetd is the telnet server daemon for Unix and Linux. Telnet is a network protocol used to provide communication between a telnet server and a telnet client through a command line interface. The...

Looking up information on a domain name can be very helpful for many IT professionals and end users alike. Information such as Meta data, indexed data, the register and server data can all be gain...

Finding an IP address from a Media Access Control (MAC) address is accomplished using the ARP command. ARP maps the physical MAC address with the IP. The MAC address is a unique, alphanumeric...

Although most people are used to the graphical user interface of email, the protocol is actually a simple process that can be done from a telnet command line. Servers running telnet with email...

If you want to access the desktop of remote computers, you will need a VNC (Virtual Network Computing) Server to be running on the remote computer. The RealVNC Server (known as vncserver on Linux...

Kerberos is a network authentication protocol used to authenticate users over a non-secure network. It requires that the server and client share a common key to encrypt and decrypt communication....

Kerberos is a network authentication protocol that uses symmetric-key cryptography to authenticate users over a nonsecure network via a ticketing system. It requires that the server and client...

Every computer or website on the Internet has a binary IP address that is typically presented in the dot-decimal form (e.g. 195.24.15.0). The domain-name system (DNS) is a special service within...

Apache is an Open Source HTTP (Web) Server that is available for Windows and Linux, as well as other Operating Systems. It is designed to serve static and dynamic Web pages over the World Wide...

Cable modem problems can stem fro three key issues related to the operating system, physical connection or configuration problems. Troubleshooting a cable modem is a simple process you can...

Using an FTP (File Transfer Protocol) service, you can download and upload files over a network. Connecting to an FTP server requires knowledge of a series of commands, including the "change...

ArcServe is a backup software used by businesses to save archived backups of important documents and software. Hopefully, backups aren't needed often, so occasionally administrators forget the...

The original FTP protocol did not encrypt password and user name data, because the protocol does not require this information to be encrypted. The need to keep passwords private gave birth to a...

Open-source programming is one of the great innovations of the Internet age. Open-source principles allow a product's source code to become available to others. One popular open-source product is...

The Internet is similar to our phone system in that it uses a string of numbers to connect one computer to another. It isn't easy, however, for people to remember the string of 11 numbers each...

ARP stands for Address Resolution Protocol. ARP is one of a set of protocols that enables data transmission across the Internet. When your computer's operating system sends data over the Internet,...

Measuring the true throughput of a network can be a difficult task due to the challenge of removing all of the non-network related bottlenecks. An example of such a bottleneck is when a large file...

A DNS, or domain name system, is a system for naming computers, services and other devices on the Internet. Domain name systems translate domain addresses, which people associate with a certain...

The Linux firewall helps to protect the server from damaging content on the Internet or network. When disabling the firewall, it is a good idea to disconnect the server from the Internet or...

To "ping" a computer or to ping an IP address simply means to query that IP address to see if there is a response. If a response returns via the ping, the IP address on the pinged computer is...

Telecommunication network protocol, also known by the nickname "Telnet," can be used to access wide area (WAN) and local area (LAN) networks. A cross-platform protocol, Telnet can be used on a...

Internet Information Services (IIS) is a web server provided by Microsoft that ships with most versions of its Microsoft Windows operating system. When doing web development or managing operations...

This article talks about the basic configuration of a Cisco Catalyst switch. Use these commands when you get a new or used Cisco switch that you want to configure. These commands will work on...

Your IP address is a numerical identification number that is used to logically identify your pc or any device that is participating in a network. At times for what ever reason you might need to...

Your IP address is the dynamic address that is assigned to your pc, labtop or printer. If your troubleshooting something on your home network its good to know how to find this address.

Telnet is a TCP/IP protocol, triggered by user command, that allows you to access a remote computer. While obtaining files from a remote computer via FTP is common, Telnet actually goes one step...

Use these instructions to lookup your IP address from a Windows XP workstation. Depending on what you are doing on the internet, you may need to provide your IP address as a way to identify...

This article will show you how to configure your network through the command shell in Linux. (Sometimes you don't always have access to the Window Manager)

The Cisco brand 2000 series routers are used to filter internet and file sharing traffic over large networks or multiple small networks. If you have different groups or organizations within those...