Hybrid topology 1 Hierarchical Topology The hierarchical topology is also known as tree topology, which is divided into different levels connected with the help of twisted pair, coaxial cable or fiber optics This type of topology is arranged in the form of a tree structure in which top level contains parent node root nodewhich is connected with the child nodes in the second level of hierarchy with point-to-point link. The second level nodes are connected to the third level nodes, which in turn are connected to the fourth level nodes and so on. Except the top-level nodes, each level node has a parent node. The number of point-to-point links in the hierarchical type of topology is generally one less than the total number of nodes in the structure.
Next Page A Network Topology is the arrangement with which computer systems or network devices are connected to each other.
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|Computer Network - Types and Topologies | Bank Exams Today||Tree Topology Mesh Topology 1. In a bus network the computers are connected by a cable called a bus and messages are sent along to bus.|
Topologies may define both physical and logical aspect of the network. Both logical and physical topologies could be same or different in a same network. Point-to-Point Point-to-point networks contains exactly two hosts such as computer, switches or routers, servers connected back to back using a single piece of cable.
Often, the receiving end of one host is connected to sending end of the other and vice-versa.
If the hosts are connected point-to-point logically, then may have multiple intermediate devices. But the end hosts are unaware of underlying network and see each other as if they are connected directly.
Bus Topology In case of Bus topology, all devices share single communication line or cable. Bus topology may have problem while multiple hosts sending data at the same time.
It is one of the simple forms of networking where a failure of a device does not affect the other devices. But failure of the shared communication line can make all other devices stop functioning. Both ends of the shared channel have line terminator. The data is sent in only one direction and as soon as it reaches the extreme end, the terminator removes the data from the line.
Star Topology All hosts in Star topology are connected to a central device, known as hub device, using a point-to-point connection. That is, there exists a point to point connection between hosts and hub. The hub device can be any of the following: Layer-1 device such as hub or repeater Layer-2 device such as switch or bridge Layer-3 device such as router or gateway As in Bus topology, hub acts as single point of failure.
If hub fails, connectivity of all hosts to all other hosts fails. Every communication between hosts, takes place through only the hub. Star topology is not expensive as to connect one more host, only one cable is required and configuration is simple.
Ring Topology In ring topology, each host machine connects to exactly two other machines, creating a circular network structure. When one host tries to communicate or send message to a host which is not adjacent to it, the data travels through all intermediate hosts.
To connect one more host in the existing structure, the administrator may need only one more extra cable. Failure of any host results in failure of the whole ring. Thus, every connection in the ring is a point of failure.A Network Topology is the arrangement with which computer systems or network devices are connected to each other.
Topologies may define both physical and logical aspect of the network. Both logical and physical topologies could be same or different in a same network. Point-to-point networks . A computer network topology is the physical communication scheme used by connected devices.
Common network topologies include bus, ring, and star.
Computer Network Topologies Maninder Kaur [email protected] What is a Topology? • Network topologies describe the ways in which the elements of a network are mapped.
They describe the physical and logical arrangement of the network nodes. 1 Computer Network Topologies Maninder Kaur [email protected] What is a Topology?
• Network topologies describe the ways in which the elements of a. 1 Computer Networks A group of two or more computer systems linked together.
There are many [types] of computer networks: Peer To Peer (workgroups) The computers are connected by a network, however, there is NOT a Server present. Metropolitan area networks (MAN). Computer and Network Examples. A Metropolitan Area Network (MAN) is a large computer network on the large geographical area that include several buildings or even the entire city (metropolis).