For Introduction to Network 1.What is computer networking means? 2.What is network topology list three and explain brifly? 3.What is router and how it works? 4.What is the different between Hub and Switch? Solution 1. A computer network: It is a telecommunications network which permits computers to swap data. In computer networks, networked computing machines exchange data with every other using a data link. The connections between nodes are instituted using either cable media or wireless media. 2. A topology is just put; a topology is explained of a network. There are actually three basic kinds of topologies. They are Star, Bus, and Ring. All computers and devices be connected in series to a solitary linear cable named a trunk or occasionally called a backbone. Star: All computers and devices are attached to a centrally placed hub or switch. The hub or switch collects and issues the flow of data within the network. It’s improved to employ a switch than a hub as a switch transmits the data to the future recipient rather than to every host on a network. Bus: every computer and device is connected in series to a solitary linear cable named a trunk or sometimes named a backbone. Both ends of the trunk must be ended to stop the signal from bouncing back up the cable. As the bus topology does not have a central point it is hard to troubleshoot problems. As well, a break at any point along the bus can reason the entire network to go down. Ring: In this topology, every computer and device is connected to cable that forms a closed loop. Every computer on this sort of topology acts like a repeater and boosts the signal previous to sending it to the after that computer. It broadcasts data by passing a token around the network. Therefore this kind of network is commonly named a token ring network. Alike to the Bus topology, if single computer fails, the whole network goes down. 3. Routing is the procedure of forwarding IP packets as of one network to another. A router is a device that joins networks jointly and routes traffic among them. A router will contain at least two network cards, one actually attached to one network and the further physically connected to another network 4. Hubs, switches, and routers are all devices that let you attach one or more computers to further computers, networked devices, or still other networks. all has two or more connectors named ports into which you plug in the cables to create the connection..