Network Security

Network security in the 21st century has become much more complex than ever before. New types and sources of network security threats, always-on high-speed Internet connections, wireless networking, and much more sophisticated methods of attacking networks have made network security both more difficult to manage and more essential in today's technological environment. In a nutshell, the job of network security is to ensure that people who need access to the network and its data can have that access whenever they need it, while denying access to anyone who is not authorized. However, there are many fronts on which network security is vulnerable; it is always subject to people-related, hardware-related, and software-related failures, and even when all of these elements do their jobs, it can still be vulnerable to attack from hackers who know how to get around even functioning security barriers. This paper will address the types of vulnerabilities that impact network security and the measures that can protect a network against them.

The three primary types of network protection are the same as the three primary areas where a network can be attacked. Every network needs protection against people-related, hardware-related, and software-related attack, so each of these areas of network security need to be managed carefully. To secure a network against people-related failures, good network security procedures must be implemented and put into use c

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ured properly and updated frequently with patches (Schultz, 10). Hardware-related network protection includes such hardware barriers as servers, hubs, switches, routers, and hardware firewalls (Zimmerman, 1-2). So-called "secure networks" employ an additional layer of hardware protection by employing more secure hardware: secure servers, removable hard drives, secure modems that communicate over shielded lines, dial-back systems, and crypto-capable routers. A combination of both hardware and software security solutions is a virtual private network, or VPN. A VPN offers "secure, scalable, encrypted tunnels across a public network" for remote access, or an intranet VPN that features "tunneled connections with rich VPN services, like IPSec encryption and QoS to ensure reliable throughput" (Tyson, 3). Wireless Networks The introduction of wireless networks and their ubiquity in the technological environment poses a new type of exposure and vulnerability for network security. Controlling and maintaining the security on a wireless network is much more difficult than on a traditional wired network due to over-the-air transmission of information (TESSCO Technologies, Inc.). Ensuring that people have access to the applications they ne

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