The purpose of networking is granting others to access the computer and share the programs. At the beginning, a network is quite safe because in a closed system, and to do something dangerous that must have physical access to the server for the wired LAN. Internet option and remote access to connect has changed that. Available to a wider and less cost of broadband (DSL and cable) connection way that even home computer remains connected to the Internet all the time, which adds the possibility for hackers to get access to the computer. Therefore we need the computer networking security.

Networking Security

Operating systems were originally designed for a stand alone computer, not the network, and security was not a problem. When the computer networking became familiar, applications and operating systems concentrated on the ease of accessibility rather than the security. Therefore, security issues are now installed on lots of hardware systems. Modern operating systems like Windows XP are planned with safety inside, but they have to operate using a usual network protocol, which can cause security problems.

Users want an easy access to the network. At the same time, administrators want to keep the network safe. The two goals rely on the opportunity, because access and security are the opposite of the scale. You may have more than the one but less of the other.

For organizations the most important is to keep a balance of both, workers are not bothered by security levels, and the servers are remain protected from unauthorized users. Unfortunately, sometimes internal network security threats come from within the organization, rather than those who come through the Internet. These include employees who on purpose attempt to scratch data or carry in viruses, or hit on the computer network.

Other internal threats; contract workers who have physical access to the LAN computers; employees may install their own software for personal purpose. Unwittingly, these pose a security threat to company’s network.

External security threats are usually coming from the internet. These threats are known as hackers’ attacks. Such people can exploit the weaknesses and the characteristics of computer operating system and software application.

They take advantage of the manner various network communication protocols work to do things, such as: enter the system and read, copy, modify or remove the data; destroy operating system and application files; or install virus that can spread across the network.

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