Which statement describes an extended star topology?
Options
A) End devices connect to a central intermediate device, which in turn connects to other central intermediate devices.
B) End devices are connected together by a bus and each bus connects to a central intermediate device.
C) Each end system is connected to its respective neighbor via an intermediate device.
D) All end and intermediate devices are connected in a chain to each other.
Answer Explanation
Extended Star Topology
The extended star topology includes a network device that is directly connected to the central networking device. The network is composed of interconnected switches and a central networking device that controls the network. The star topology is the most common network topology at homes and offices.
The network has different nodes, which are called hosts, and a central hub or server, which provides communication between them. A peripheral host is also known as a central hub, and nodes are called leaves of a peripheral host. Communication takes place at the central hub, such that if any node wants to transfer a message to another, it first sends the message to the central hub, which then passes the message on to the recipient node.
To provide more functionality for organization and subnetting, we added sub central devices in extended star topology rather than connecting all devices to the central unit.
Advantages of Extended Star Topology
- Compared to a bus topology, extended star topology provides better performance. The network is not overburdened with redundant messages. Messages are sent only between source node, central hub and destination node.
- Devices can be added easily as networks expand.
- The network cannot be brought down by a single node failure.
- It is possible to connect the new equipment to the network and connect it to the central hub. There is no trouble removing the nodes from the network.
- Problems with devices and cables are easily found.
- You can upgrade it to a faster version.
- The topology allows multiple nodes to be controlled at the same time.
- It is possible to transmit data over the network, and there are fewer chances of network failure than with bus topologies.
- Because it is widely used, support is readily available.
Disadvantages of Extended Star Topology
- Due to the fact that all nodes are connected to the central hub, more cable is required at each node to connect to the central hub, thus requiring more cable than a bus or ring network.
- Each node of the network is connected to the central hub, so if the central hub fails, the whole network will fail.
- If there are more nodes connected to a central hub or switch, it will reduce their performance and increase network congestion.
- Costs of installation and equipment are higher than those of bus networks.
Uses of Extended Star Topology
- It is used when multiple nodes need to be connected to one central node and they need to be controlled by the central node.
- LAN (Local Area Network) connections can be established with it. Network connections help systems communicate with each other. LAN connections are for short distances.
- Using it, data and information can be transmitted from one node to another. If all nodes are connected to a central hub or switch, one node can send messages to any other node.
- Home and office use it. Extended star topologies reduce the failure probability of the network. Due to the connections between the nodes and the central hub, there is a little chance of the network failing since each node is independent of the others and connected to the hub.
Which of the following is not a Network Topology?