Single Node Topology
Single Node Topology
Topology provides different configurations that are used to create a network. A network is a group of devices connected by communication paths to exchange information and share resources. While connecting computers together to form a network, the user needs to consider the structure, layout and the cabling requirements. A network can be created by using point-to-point connection or multipoint connection. In a point-to-point connection, only two devices are connected to each other. The user can use a point-to-point connection to transfer data from local network to a remote network through a dedicated line. Examples of point-to-point connection are microwave, satellite and television network. In multipoint connection, many devices share the connection and are called as multi-drop connection.
Topology is a pattern of computer devices and describes the way in which these devices are connected.
Topologies can be physical or logical. Physical topology refers to the actual physical structure of the network, while a logical topology determines the way in which the data actually passes through the network from one device to other. Different types of topologies are
• Single node Topology,
• Star Topology,
• Bus Topology,
• Ring Topology,
• Mesh Topology,
• Tree Topology, and
• Hybrid Topology.
Physical topologies are how the wires are interconncected, while logical topology is how the network behaves and interoperate.
Single node Topology
In single node topology, the server or host is having all the information for the network. The terminal sometimes called a dumb terminal does not contain necessary files to function independently is connected to the server. A dumb terminal is the cheapest computer device to use on a network but it relies on the resources of the server. Generally, the host is larger (mini computer to mainframe) and capable of serving host of terminals.
Basic Structure of Single Node Topology
A single node network includes a single device which is connected to the server. The server is the main device that is used for network data storage. If a node does not contain files and information needed for operation, it is known as a "dumb terminal". These dumb terminals access the required files from the server, operate on them and return them back to the server after completing the task. Terminals, other than the dumb terminals contain their own files and applications. Such terminals use the server only for backing up files on its hard drive or using its printer.
Advantages and Disadvantages of Single Node Topology
Generally a larger computer (mini computer to mainframe) is used as a server in single node topology. Such server is capable of being connected to hundreds of terminals.
Advantages of single node topology are:
- Easy to install, configure and manage
- Least expensive, as a 'dumb terminal' is the cheapest computer
- Single cable is required
Disadvantages of single node topology are:
- Only a single device is connected in the entire network.
- Dumb terminal is dependent on the server for resources.
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