Computer Networks

Computer Networks | theAShub Store
Computer Networks | theAShub Store
💡 What we cover !
• Computer Networks
• Advantages and disadvantages of Networks
• Components of a Computer Networks
  In history of mankind, networking in any form has always given better results, outcomes and utilization of resources. Here we talk about computer networking.
“Connections among computers make computer networks”

◘ Computer Networks

Two or more computing devices connected to one another in order to exchange information or share resources, from a computer network. For example, if in your home, you connect your smartphone, laptop, smart TV, gaming console and a printer simultaneously either using cables or through Wifi, it will be termed as Computer Networks.

◘ Let’s talk about some important aspects on Computer Networks

Advantages of Networks
  • Share resources :- Such as printers and scanners. This is cheaper than buying equipment for each computers.
  • Share Storage :- Being able to access files from any machines on the networks can share data.
  • Improve Communications :-  Messages can be sent.

Disadvantages of Networks

  • The systems are more complex to run. This can add to costs and you may need specialist staff to run the networks.
  • If networks are badly managed, services can become unusable and productivity falls.
  • Files security is more important especially if connected to WANs e.g., protection from viruses.

Computer Networks are very useful in many ways. They facilitate resource sharing, enhanced communications, cost reduction and so forth.

◘ Components of a Computer Networks

Merely by joining two computer with a cable won’t form a Network. In fact, there are many components together make a network.
Major Components of a Computer Networks are :-
  • Hosts/Nodes (Such as PC, Laptops, smartphones etc.)
  • Servers
  • Client
  • Network Hardware (such as NIC, router, switch, hub etc.)
  • Communication channel (such as cables, radio links etc.)
  • Software (such as protocols, network operating system etc.)
  • Network Services (such as BNS, file sharing etc.)
Let’s elaborate all the above mentioned terms one by one.

Host or Nodes- The term host or node refers to the computers that are attached to a networks and are seeking to share the resources of the networks. So your PCs, laptops, smartphones etc. when connect to a network become hosts.

Server- A server is a very important computer in a network. A server is responsible for making the networking tasks happen. In other words, it facilitates networking tasks like sharing of data, resource-sharing, communication among hosts etc.

Clients- Client is a related term. A client computer is a host computer that requests for some services from a server.

Network Hardware- Other than hosts and writing, a network requires specialized hardware to carry out various roles, such as establishing corrections, controlling network traffic etc. There are many different types of hardware are required in a network as like:-

  • NIC (Network Interface Unit)- It is a network card attached to a host so as to establish network connections.
  • Hub, switch, router are connectivity devices and many others.
Communication Channel- Hosts in a network interact with other hosts and server through a communication channel or communication medium. The communication channels can either be wired or wireless.

  •  Wired Communication Channels (twisted pair cables, coaxial cables, fibre optic cables)
  • Wireless Communication Channels (Radio waves, satellites, infrared waves, laser etc.)

Software- The software layers of a network make networking possible. These comprise of network protocols, network operating system etc.

  • A protocol refers to a pre-decided set of rules using which all parties of a network connect and interact with one another.
  • A network operating system is a specialized operating system that can handle networking tasks.
Network Services- These refer to the applications that provide different functionalities over a network, such as DNS, file sharing, VoIP and many more.

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