Knowledge Base: Computer Networks
Different types of Computer Networks are used according to the application area. For computer problems, you can use the IMPCSUPPORT computer service. They provide 365 days online technical support 24 * 7.
In the last article I gave you general information about how to network computers. I have several emails from friends like all of you who are curious about types of computer networking. So in this article I will give you complete details about the types of computer networks. Computer networks can be classified on many aspects such as physical level, special purpose, organizational level. There are the following types of computer networks:
Personal Area Network: A personal area network (PAN) is a computer network used for communication between computers and various information technology devices that are close to a single person. Some examples of devices used in PAN are personal computers, printers, fax machines, telephones, PDAs, scanners, and even video game consoles. PAN can cover both wired and wireless devices Private networks are the smallest of all networks with most networks not exceeding a total size of 25 feet.
Local Area Networks:
A local area network (LAN) is a network that connects computers and devices in a limited geographic area such as homes, schools, computer labs, office buildings, or tightly positioned groups of buildings. Today’s wired LANs are most likely based on Ethernet technology. The range is up to 12 km.
Metropolitan area network:
Metropolitan area network (MAN) is a large computer network that usually covers a large city or campus. Metropolitan Area Network is a combination of two or more individual local area networks but with small criteria the network boundaries do not exceed city limits, thus integrating the network as one unit within the city. The range is about 50 Km.
Wide Area Network:
A wide area network (WAN) is a computer network that covers a large geographic area such as cities, countries, or even intercontinental distances, using communication channels that combine many types of media such as telephone lines, cables, and airwaves. WANs often use transmission facilities provided by public operators, such as telephone companies. WAN technology generally functions at the bottom three layers of the OSI reference model: the physical layer, the data link layer, and the network layer.
Storage area network:
A storage area network (SAN) is a specialized network that provides access to consolidated block level data storage. SAT is primarily used to create storage devices, such as disk arrays, tape libraries, and optical jukeboxes, access to servers so that devices appear like devices attached locally to the operating system. SANs typically have their own network of storage devices which are generally inaccessible over the local area network by other devices. The cost and complexity of SAN fell in the early 2000s to a level that allowed wider adoption in enterprise and small to mid-sized business environments.
Virtual private network:
A virtual private network (VPN) is a computer network in which multiple links between nodes are carried by open connections or virtual circuits across some larger network (for example, the Internet) instead of by physical cables. The data link layer protocols of the virtual network are said to tunnel through the larger network when this occurs. One common application is secure communication over the public Internet, but a VPN need not have explicit security features, such as authentication or content encryption. A VPN, for example, can be used to segregate the traffic of different user communities over an underlying network with strong security features.
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