Routers, gateways, firewalls, hubs, switches comprise network security infrastructure in any business environment. Creating a robust LAN security infrastructure is one of your priorities if your business is handling a lot of data, some of which may be confidential, on a regular basis. This requires you to understand the basics of internet security concepts that relate to your devices, storage media and network topologies. Here are the basics explained for you.
A security firewall comes in form of a software application or a hardware device that can be installed on the borders of secured computer networks for controlling incoming/outgoing communications. Firewalls are the considered the first line of defense in network security parlance. At present, four basic types of firewalls are in use, including circuit-level firewalls, packet filtering firewalls, application-level firewalls, and stateful inspection gateways.
Network security policies
A network security policy concerns issues with network use. Generally, network policy is categorized into high-level and low-level policy. While high-level security policy tries to get to the base or the root of the security issues, low-level policies encompass placing administrative controls strategically.
In general, a high-level network security policy defines which applications are permissible for use within a business environment, which applications can be used for external communication and which security conditions and protocols to be followed. Periodic security audit and authentication are part of low-level policies.
Routers are physical devices that are used for connecting network segments of various networks into one large network. Routers function at the network layer and the router behavior is largely determined by the protocols that are in use. Unless it is a business requirement, you ought not to mix protocols.
In network security parlance, switches are also called micro-segmentation. Switches have lately replaced the traditional multiport repeaters. Switches facilitate solving of media contention and congestion problems. A network switch can provide effective protection against any attempt to snoop into the network. MAC filtering, port access and some other threats are successfully thwarted by network switches.
If you are looking to get familiar with more network security jargons, you need to do some research on the internet. The internet is replete with websites and blogs that provide a detailed definition of the network jargons. Alternatively, you can talk to a network security expert over the phone to know the meanings of different industry jargons.