What is network topology and types?
What is Network Topology? Explain the Different Types of Network Topologies. The term physical topology refers to the way in which a network is laid out physically input/output or more devices connect to a link; two or more links form a topology. Show
Definition of Network TopologyThe term topology in computer networking refers to the way in which a network is laid out physically. Two or more devices connect to a link; two or more links form a topology. The topology of a network is the geometric representation of the relationship of all links and linking devices (usually called nodes) to one another. The cost and flexibility of a network installation are partly affected by as is system reliability. Many network topologies are commonly used, but they all have certain similarities. Information is carried either through space (wireless) or cable. The cable must control the movement of information on the network so that data can be transmitted in a reliable manner. Network Topology is the schematic description of a network arrangement, connecting various nodes(sender and receiver) through lines of connection. In a computer network, there are mainly six types of physical topology, they are: The Different Types of Network Topologies
1. Mesh TopologyIn a mesh topology, every device has a dedicated point-to-point link to every other device. The term dedicated means that the link carries traffic only between the two devices it connects. In a mesh topology, Node1 must be connected to n 1 nodes, node2 must be connected to ( n - 1) nodes, and finally, node n must be connected to (n - 1) nodes. We need n (n - 1) physical links. In other words, we can say that in a mesh topology. Advantages of Mesh Topology
Disadvantages of Mesh Topology
2. Star TopologyIn a star topology, each device has a dedicated point-to-point link only to a central controller, usually called a hub. Star topology, computers are connected by cable segments to a centralized component, called a hub or switch. Signals are transmitted from the sending computer through the hub or switch to all computers on the network. This topology originated in the early days of computing with computers connected to a centralized mainframe computer. It is now a common topology in microcomputer networking. Each device has a dedicated point-to-point link only to a central controller, usually called a hub. The devices are not directly linked to one another. The devices are not directly linked to one another. Unlike a mesh topology, a star topology does not allow direct traffic between devices. The controller acts as an exchange: If one device wants to send data to another, it sends the data to the controller, which then relays the data to the other connected device. Advantages of Star Topology
Disadvantages of Star Topology
3. Bus TopologyThe preceding examples all describe point-to-point connections. A bus topology, on the other hand, is multipoint. One long cable acts as a backbone to link all the devices in a network. The bus topology is also known as a linear bus. In other words, all the nodes (computers and servers) are connected to the single cable (called bus), by the help of interface connectors. This central cable is the backbone of the network and every workstation communicates with the other device through this bus. It depends on numerous factors including:
Advantages Bus Topology
Disadvantages of Bus Topology
4. Ring TopologyRing Topology In a ring topology, each device has a dedicated point-to-point connection with only the two devices on either side of it. The ring topology connects computers on a single circle of cable. There are no terminated ends. A ring topology connects one host to the next and the last host to the first. The signal travels around the loop in one direction and passes through each computer. Unlike the passive bus topology, each computer acts as a repeater to boost the signal and send it on to the next computer. Because the signal passes through each computer, the failure of one computer can impact the entire network. A signal is passed along the ring in one direction, from device to device, until it reaches its destination. Advantages of Ring Topology
Disadvantages of Ring Topology
5. TREE TopologyIt has a root node and all other nodes are connected to it forming a hierarchy. It is also called hierarchical topology. It should at least have three levels to the hierarchy. There is a main hub and all the other sub-hubs are connected to each other in this topology. Following are the advantages of Tree topology:
Following are the disadvantages of Tree topology:
6. Hybrid TopologyBefore starting about Hybrid topology, we saw that network topology is a connection of various links and nodes, communicating with each other for the transfer of data. We also saw various advantages and disadvantages of Star, Bus, Ring, Mesh. Hybrid, as the name suggests, is a mixture of two different things. Similarly in this type of topology, we integrate two or more different topologies to form a resultant topology which has good points (as well as weaknesses) of all the constituent basic topologies rather than having characteristics of one specific topology. This combination of topologies is done according to the requirements of the organization. It is two different types of topologies which is a mixture of two or more topologies. For example, if there is an existing ring topology in one office department while a bus topology in another department, connecting these two will result in Hybrid topology. Remember connecting two similar topologies cannot be termed as Hybrid topology. Star-Ring and Star-Bus networks are the most common examples of the hybrid network. For example, if in an office in one department ring topology is used and in another star topology is used, connecting these topologies will result in Hybrid Topology (ring topology and star topology). Advantage of Hybrid Topology
Disadvantage of Hybrid Topology
What are the 4 types of topology in networks?The 4 Different Types of Computer Network Topologies. Bus Topology. Bus topologies have the simplest layout. ... . Star Topology. In star topology, you use a central hub or switch as a sort of middleman for data transmission. ... . Ring Topology. ... . Mesh Topology.. What are the 7 types of network topology?Here's an overview of each of these seven network topology types to help you get started:. Point-to-point network topology. Point-to-point network topology is the simplest method. ... . Bus network topology. ... . Ring network topology. ... . Star network topology. ... . Mesh network topology. ... . Tree network topology. ... . Hybrid network topology.. What is network topology explain?What is a network topology? A network topology is the physical and logical arrangement of nodes and connections in a network. Nodes usually include devices such as switches, routers and software with switch and router features. Network topologies are often represented as a graph.
What are the 3 types of network topology?The Different Types of Network Topologies. Bus topology. As the simplest design, a bus topology requires nodes to be in a linear order. ... . Ring topology. Another simple design is the ring topology. ... . Star topology. Unsurprisingly, a star topology's setup resembles, well, a star. ... . Mesh topology. ... . Tree topology.. |