B. Types of networks based on coverage:
There are 3 kinds of Networks / Network are:
a. Local Area Network (LAN) / Local Area Network.
A LAN is a network that is limited by a relatively small area, generally bounded by the area like an office environment in a building, or a school, and usually not far from about 1 km square.
Several models of LAN configuration, one computer is usually made in a file server. Which is used to store software (software) that regulate network activity, or as software that can be used by the computers that connect to the network. The computers are connected to the network (network) is usually called a workstation. Usually workstation capabilities over the bottom of the file server and have other applications on the hard drive in addition to applications for the network. Most LANs use the media cable for connecting between one computer to another computer.
b. Metropolitan Area Network (MAN) / Metropolitan area network
A MAN, usually covering a larger area than a LAN, for example between regions within a province. In this case the network connecting several small networks into larger areas of environment, for example as follows: Bank network in which several branches of a bank in a big city is connected between each other. For example, Bank BNI in the entire region or Surabaya Ujung Pandang.
c. Wide Area Network (WAN) / Large Scale area network
Wide Area Networks (WAN) is a network that already use a scope usually means satellite or submarine cable as an example of the whole network BANK BNI in Indonesia or in other countries. Using the WAN facilities, a bank in Bandung can contact its branch offices in Hong Kong, just a few minutes. WAN usually rather complicated and very complex, using many means to connect between LAN and WAN to the Global Communications such as the Internet. But somehow between LAN, MAN and WAN are not much different in some respects, only the area is just a different scope
one of the other.
C. Topology / Physical form Network:
Topology of a network connecting a number of ways based on nodes or central in forming a network system. Network Topology most common are: Mess, Star (Star), Bus, Tree, and the Ring (Ring).
a. Mesh Network Topology
This network topology implementing the central relationship in full. The number of channels should be provided to form a mesh network is a central number minus 1 (n-1, n = number of central). The complexity of the network is proportional to the increasing number of central-mounted. Thus in addition to less economical also relatively expensive in operation.
b. Star Network Topology (Star)
In a star network topology, the central one is made as a central center. When compared with the mesh system, this system has a level of complexity of the simpler network so that the system becomes more economical, but the burden is borne fairly heavy central center. Thus the possibility of damage or disruption of this central larger.
c. Bus Network Topology
In this topology all be connected directly to the central transmission medium with a configuration called a bus. Transmission of signals from a central not flowed in both directions simultaneously. This is quite different from those in mesh or star network topology, which in both systems could be communication or interconnection between the central simultaneously. bus network topology is not commonly used for interconnection between the central, but usually used in computer network systems.
d. Network Topology Tree (Tree)
This network topology is also known as multilevel network topology. This topology is typically used to interconnect central with a different hierarchy. For the lower hierarchy depicted in locations that are low and getting older has the higher hierarchy. This type of network topology suitable for use on a computer network system.
e. Network Topology Ring (Ring)
To form a ring network, each central series must be connected to one another and this relationship will form a closed loop. In this system each central must be designed to interact with the adjacent central and far apart. Thus the ability to switch to various central direction. The advantage of this network topology, among others: the level of network complexity is low (simple), also when there is disruption or damage to a central traffic flow can then be passed on in another direction in the system. The most widely used in computer networks is jaringanbertipe bus and a tree (tree), it is because of their complexity, ease of installation and maintenance as well as the price paid. But only a tree-type network (tree) are recognized reliability as loss of one of the wires on the client, will not affect relations with other clients.
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