Basic Concepts Of Hubs Switches Gateways And Routers Pdf

basic concepts of hubs switches gateways and routers pdf

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A network switch also called switching hub , bridging hub , and, by the IEEE , MAC bridge [1] is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.

In the list of the networking devices, NIC stands on the first place. Without this device, networking cannot be done. NIC allows a networking device to communicate with the other networking device.

Computer Network Fundamentals

Hardware devices that are used to connect computers, printers, fax machines and other electronic devices to a network are called network devices. These devices transfer data in a fast, secure and correct way over same or different networks. Network devices may be inter-network or intra-network. Some devices are installed on the device, like NIC card or RJ45 connector, whereas some are part of the network, like router, switch, etc. Let us explore some of these devices in greater detail.

Network switch

In an Ethernet network, there are some networking devices that play their roles at various levels such as hubs, switches and routers. The functions of the three devices are all quite different from one another, even if sometimes they are all integrated into a single device. The following part will focus on the topic—hub vs switch vs router, aiming to clarify differences among them. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets. Hub acts as a common connection point for devices in a network. A switch operates at the data link layer layer 2 and sometimes the network layer layer 3 of the OSI Open Systems Interconnection Reference Model and therefore support any packet protocol.


Repeaters – Bridges – Routers – Gateway – Routing algorithms – TCP/IP – Overview – Network Network Devices (Hub, Repeater, Bridge, Switch, A router has four basic components: Input ports, output ports, the routing TCP/IP protocol suite maps to a four-layer conceptual model known as the DARPA model, which.


What’s the Difference Between Hubs, Switches & Bridges?

Hub is one of the basic icons of networking devices which works at physical layer and hence connect networking devices physically together. They are designed to transmit the packets to the other appended devices without altering any of the transmitted packets received. They act as pathways to direct electrical signals to travel along. They transmit the information regardless of the fact if data packet is destined for the device connected or not.

We have compiled the most frequently asked Networking Interview Questions and Answers that will help you to prepare for the Networking basics interview questions that an interviewer might ask you during your interview. In this list of Networking interview questions, we have covered all commonly asked basic and advanced interview questions on networking with detailed answers to help you clear the job interview.

Types of Modem

The key difference between hubs, switches and bridges is that hubs operate at Layer 1 of the OSI model, while bridges and switches work with MAC addresses at Layer 2. Hubs broadcast incoming traffic on all ports, whereas bridges and switches only route traffic towards their addressed destinations. Hubs provide a dedicated physical connection for every device, which helps reduce the possibility that a failure of one computer will cause all computers to lose connectivity. However, because a hub is still a shared bandwidth device, connectivity is limited to half-duplex. Collisions remain an issue as well, so hubs do not help improve the performance of the network. Hubs are essentially multiport repeaters.

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Top 135 Networking Interview Questions and Answers

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Network Devices (Hub, Repeater, Bridge, Switch, Router, Gateways and Get hold of all the important CS Theory concepts for SDE interviews.

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Explain how hubs and switches can be connected to create larger networks. ✓ Describe how bridges, routers, and gateways work. ✓ Describe how routing protocols are and functionality. Understanding how these networking devices operate and identifying the functions they perform are essential skills for any network.

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