12 hours Beginners
Computer network can be classified according to their geographical area and their uses. Depending upon the geographical area covered by a network, it is classified as:Local area network(LAN)
A LAN is a small and privately owned network to provide local connectivity within a small region. "A region” refers to the same office, the same building, the same company and in the same schools. It provide different services like document management, sharing resources, workgroup scheduling, e-mail and fax communications services and other VOIP and unified communication. Some common LAN protocols are Ethernet, Asynchronous Transfer Mode (ATM), Token Ring and Fiber Distributed Data Interface (FDDI).Characteristics of a LAN include:
A WAN is used to transmit data and information over large geographical distances which may even span entire countries and continents. A WAN can contain multiple smaller networks, such as LANs or MANs. The Internet is a WAN, and connects computers all around the world together. Communication between networks is called internetworking. WAN may use advanced technologies such as Asynchronous Transfer Mode (ATM), Frame Relay, and Synchronous Optical Network (SONET). WAN may be managed by multiple administration.Advantages and Disadvantages of WAN
PAN is used to transmit data and information very shorter distances which control by a single person within a single building. . PAN has connectivity range up to 10 meters. PAN may include wireless computer keyboard and mouse, Bluetooth enabled headphones, wireless printers, mobile, tablet, IPAD and TV remotes. For example, Internet hotspot which may contain up to 8 devices connected with a single hotspot.Advantages and Disadvantages of PAN
A MAN is a network designed to extend over an entire city. The MAN range of between 10 to 50 miles. This is a network which is larger than a LAN but smaller than a WAN.
A MAN may be single network [like a cable television network] or may be formed by connecting a large number of LANs [like a company using a MAN to connect to the LANs in all of it’s offices throughout a city].Advantages and Disadvantages of MAN
Campus Area Network is larger than a LAN, but smaller than an MAN. It area cover a university , large school or small business. It is controlled by the campus tenant/ owner: an enterprise, university, government etc. The range of CAN is measured 1Km to 5Km.Advantages and Disadvantages of CAN
A Home area network(HAN) is a type of computer network that operate within a small area typically a home or small office. It connects home digital devices, such as PCs, mobile phones, tablets, smart watch , entertainment technology, thermostats, home security systems and smart appliances, into a common network. With the increasing availability of Internet service and affordable PCs, more people are networking their multiple PCs and network-capable devices to use a single broadband outlet, usually through a cable or DSL provider.Advantages and Disadvantages of HAN
A wireless LAN or WLAN is a wireless local area network to communication over short distances using radio wave. Areas may range from a single room to an entire campus. The backbone of this network usually cables, with one or more wireless access points connecting the wireless users to the wired network. A WLAN can be built using any of several different wireless network protocols, most commonly either Wi-Fi or Bluetooth. Wireless LANs can contain many different kinds of devices including.mobile phones
A Storage Area Network (SAN) is a specialized, high-speed network joining servers and storage, including disks, disk arrays, tapes, etc. It provides block-level storage that can be accessed by the applications running on any networked servers. It consist of hosts, switches, storage elements, and storage devices that are interconnected with various technologies, topologies, and protocols.A storage area network is typically assembled using three principle components: cabling, host bus adapters (HBA) and switches.
An enterprise private network is a network build by an enterprise/company to interconnect disparate offices to each other in a secure way over a network e.g., production offices, head offices etc. An enterprise private network is mainly build for sharing computer resources.Advantages of EPN
A virtual private network (VPN) is a network technology that creates a secure connection over a public network like Internet or a private network owned by a service provider. Big company, institutions, and government agencies use VPN technology to enable remote users to securely connect to a private network. for example, A company employee go for meeting out of country and urgently need company resources to access, then he can access resource by using VPN.
Educational institutions use VPNs to connect campuses that can be distributed across the country or around the world.
The most common types of VPNs are remote-access VPNs and site-to-site VPNs.
A remote-access VPN allows a users to establish secure connections with a remote computer network using a laptop or desktop computer connected to the Internet .
A site-to-site VPN allows offices to establish secure connections with each other over a public network such as the Internet.Advantages and Disadvantages of VPN
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