Network Topology is, things that explains the geometric relationship between the basic elements of the network compiler, namely nodes, links, and the station. Network topology can be divided into five main categories as below.
1. Topology stars
Star topology is a form of network topologies in the form of convergence of the central node to each node or user. Star network topology including network topology with medium cost.Advantages
* Damage to a single channel will only affect the channel network and the station adrift.
* Security level is high.
* Resistant to a busy network traffic.
* Additions and reductions station can be done easily.Disadvantages
* If the node was malfunctioning, then the entire network to a halt.Handling
* The need for a backup center node set.
* Damage to a single channel will only affect the channel network and the station adrift.
* Security level is high.
* Resistant to a busy network traffic.
* Additions and reductions station can be done easily.Disadvantages
* If the node was malfunctioning, then the entire network to a halt.Handling
* The need for a backup center node set.
* Ring network
* Topology bus
* Mesh topology
* Topology treeEach type of topology on top of each has advantages and disadvantages. The selection of network topology based on network scale, cost, purpose, and users.
* Topology bus
* Mesh topology
* Topology treeEach type of topology on top of each has advantages and disadvantages. The selection of network topology based on network scale, cost, purpose, and users.
2. Topology is ring-shaped network topology circuit, each point is connected to two other points, such that forming a circular path to form a ring. In a ring topology, data communication can be disrupted if a single point of disturbance. FDDI networks anticipate this weakness by sending data in clockwise and counterclockwise with clockwise direction simultaneously.
3. On a bus topology network two unjung must end with a terminator. Barrel connector can be used to expand them. Network consists of only one cable channel using BNC cables. Who wants to connect to a computer network can be linked himself with mentap Ethernet over cable.
Linear Bus: This layout includes the general layout. One main cable connecting each node, the computers that access a single channel with the tip of the tip. Each node is connected to two other nodes, except the engine at one end of the cable, each node is only connected to one another. This topology is often found on client / server, where one of the machines on the network functioned as a File Server, which means that the machine is devoted only to the distribution of data and are not usually used for processing information.
Bus network installation is very simple, cheap and consist of a maximum of 5-7 computers. The difficulty often faced is the possibility of data collisions because the mechanism is relatively simple network and if one node is broken it will disrupt the entire network performance and traffic.
* Excellence is developing a network bus topology or adding new workstations can be done easily without disrupting the other workstations.* The weakness of this topology is that if there is interference along the cable, the center of the whole network will be disrupted.
Linear bus topology is a topology widely used in the mushrooming use of Coaxial cable. By using the T-Connector (with a 50ohm terminator on the end of the network), then the computer or other network device can easily be connected to one another. The main difficulty of using coaxial cables is difficult to measure whether the coaxial cable that is used completely matched or not. Because if not truly be measured properly will damage the NIC (network interface card) which is used and the network performance becomes constrained, not reaching maximum capacity. This topology is also frequently used in fiber-optic network with a base (which later merged with a star topology to connect with a client or a node.)
Linear Bus: This layout includes the general layout. One main cable connecting each node, the computers that access a single channel with the tip of the tip. Each node is connected to two other nodes, except the engine at one end of the cable, each node is only connected to one another. This topology is often found on client / server, where one of the machines on the network functioned as a File Server, which means that the machine is devoted only to the distribution of data and are not usually used for processing information.
Bus network installation is very simple, cheap and consist of a maximum of 5-7 computers. The difficulty often faced is the possibility of data collisions because the mechanism is relatively simple network and if one node is broken it will disrupt the entire network performance and traffic.
* Excellence is developing a network bus topology or adding new workstations can be done easily without disrupting the other workstations.* The weakness of this topology is that if there is interference along the cable, the center of the whole network will be disrupted.
Linear bus topology is a topology widely used in the mushrooming use of Coaxial cable. By using the T-Connector (with a 50ohm terminator on the end of the network), then the computer or other network device can easily be connected to one another. The main difficulty of using coaxial cables is difficult to measure whether the coaxial cable that is used completely matched or not. Because if not truly be measured properly will damage the NIC (network interface card) which is used and the network performance becomes constrained, not reaching maximum capacity. This topology is also frequently used in fiber-optic network with a base (which later merged with a star topology to connect with a client or a node.)
4. Network Topology Tree (Tree) network topologies are also known as multilevel network topology. This topology is usually used for interconnection between different central denganhirarki. To the lower hierarchy is described in the locations of low and increasingly higher up the hierarchy have. This type of network topology suitable for computer network systems.In tree networks, there are several levels of nodes (node). Central or higher level node, another node can set a lower level. Data sent to the central node first. For example to move from a computer with a node-3 node kekomputer-7 as well as in the figure, the data must pass through node-3, 5 and node-6 before ending at the node-7. Keungguluan network tree model like this is, can the formation of a group that is required at all times. For example, companies can form a group consisting of terminal accounts, as well as on other groups formed to terminal sales. The weakness is, if the node is higher then does not work, then the other group who are below it eventually also became ineffective. How the tree network is relatively slow.
5. Mesh topology is a form of relationship between devices whereby each device is connected directly to other devices on the network. Consequently, in a mesh topology each device can communicate directly with the target device (dedicated links).
Thus the maximum number of connections between devices on the network can be calculated bertopologi this mesh is n (n-1) / 2. Moreover, because every device can connect to other devices on the network, each device must have as many as n-1 Port Input / Output (I / O ports).Based on the above understanding, would be an example that if as many as 5 (five) computers will be connected in a mesh topology so that all connections between computers to function optimally, the necessary connection cables as much as five (5-1) / 2 = 10 cable connection, and each each computer must have a port I / O ports as much as 5-1 = 4 (see picture)
With this form of such relationship, mesh topology has several advantages, namely:
* Relationship dedicated links guarantees direct data delivered to the destination computer without having to go through another computer so it can more quickly because one link is used exclusively for communicating with the destination computer only (not used beramai-ramai/sharing).
* Having a robust nature, namely the event of disruption to computer connection A with computer B because of damage to the cable connections (links) between A and B, then the disturbance will not affect computer A connection with other computers.
* Privacy and security in mesh topology is more reliable, because the communication that occurs between the two computers will not be accessible by other computers.
* Facilitate the process of problem identification in the event of damage to connections between computers.
Nevertheless, the mesh topology is not without its shortcomings. Some deficiencies can be recorded as follows:
* Requires a lot of cable and port I / O. more and more computers in a mesh topology is needed more and more cable links and I / O ports (see the formula computation needs of cable and port).
* It also indicates that once the topology of this type * Because every computer must be connected directly with other computers then the installation and configuration becomes more difficult.
* Number of cable used also suggests the need to allow space in the room where the computers are located.Based on the advantages and disadvantages, mesh topology is usually implemented on the main computers where each computer is the main form separate networks with different topologies (hybrid network).
Thus the maximum number of connections between devices on the network can be calculated bertopologi this mesh is n (n-1) / 2. Moreover, because every device can connect to other devices on the network, each device must have as many as n-1 Port Input / Output (I / O ports).Based on the above understanding, would be an example that if as many as 5 (five) computers will be connected in a mesh topology so that all connections between computers to function optimally, the necessary connection cables as much as five (5-1) / 2 = 10 cable connection, and each each computer must have a port I / O ports as much as 5-1 = 4 (see picture)
With this form of such relationship, mesh topology has several advantages, namely:
* Relationship dedicated links guarantees direct data delivered to the destination computer without having to go through another computer so it can more quickly because one link is used exclusively for communicating with the destination computer only (not used beramai-ramai/sharing).
* Having a robust nature, namely the event of disruption to computer connection A with computer B because of damage to the cable connections (links) between A and B, then the disturbance will not affect computer A connection with other computers.
* Privacy and security in mesh topology is more reliable, because the communication that occurs between the two computers will not be accessible by other computers.
* Facilitate the process of problem identification in the event of damage to connections between computers.
Nevertheless, the mesh topology is not without its shortcomings. Some deficiencies can be recorded as follows:
* Requires a lot of cable and port I / O. more and more computers in a mesh topology is needed more and more cable links and I / O ports (see the formula computation needs of cable and port).
* It also indicates that once the topology of this type * Because every computer must be connected directly with other computers then the installation and configuration becomes more difficult.
* Number of cable used also suggests the need to allow space in the room where the computers are located.Based on the advantages and disadvantages, mesh topology is usually implemented on the main computers where each computer is the main form separate networks with different topologies (hybrid network).
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