What are the types of Network in Information Security?

There are three types of Networks in Information Security which are as follows −

  • Local Area Network (LAN) − Local area network is a computer network that works in a small area, i.e., it connects computers in a small geographical location like inside an office, company, school, or any other organization. Therefore, it exists within a specific location, such as home network, office network, school network, etc.

    A local area network can be a wired or wireless network or a set of both. The devices in a LAN are usually linked using an Ethernet cable, which provides an interface to connect multiple devices such as router, switches, and computers.

    For example, using an individual router, few Ethernet cables, and computers, it can produce a LAN at the home, office, etc. In this network, one computer can act as a server and other computers, which are an element of the network, can serve as clients.

  • Metropolitan Area Network (MAN) − MAN is a high-speed network that spreads over a large geographical area including a metro city or town. It is install by connecting the local area networks using routers and local telephone exchange lines. It can be operated by a private company, or it can be a service supported by a company including a local telephone company.

  • Wide Area Network (WAN) − WAN boost over a large geographical area. It is not confined inside an office, school, city, or town and is generally set up by telephone lines, fiber optic, or satellite connection. It is generally used by big organizations like banks and multinational organization to communicate with their branches and users across the world.

  • Value Added Network (VAN) − A value-added network (VAN) is a private network provider that is hired by an organisation to facilitate Electronic Data Interchange (EDI) or support multiple network services. VANs are public networks that add value by sending data and by supporting access to commercial databases and software.

  • Internet − The Internet is a worldwide network of computer networks. It is an interconnection of large and small networks around the world. In another terms, it is a global network of networks connecting some millions of computers.

  • Intranet − Intranet can be designed as a network connecting an affiliated group of clients using standard Internet protocols, particularly TCP/IP and HTTP.

  • Extranet − Extranet can be represented as a ‘business-to-business-intranet’ that enables limited, controlled, secure access between a company’s intranet and designated, authenticated users from remote areas or in other words, an intranet that enables controlled access by authenticated parties. The intranet and extranet are roughly web-based analogs of LAN (Local Area Network) and WAN (Wide Area Network).