Introduction to Networking

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Networking is the technology by which we connect two or more devices like computer, mobile phones, PDAs and IoT Devices. Network can be wired or wireless. Although a network serves the end devices but there are Internet networking devices like switch, router, access point, firewalls etc. We need to learn about the devices to administrate a network but before that we need to know some basics about network technologies.

Let’s learn about some characteristics of network:

  1. Speed
  2. Cost
  3. Security
  4. Availability
  5. Scalability
  6. Reliability
  7. Security
  8. topology

These are the standard of a network.

Types of network

  1. Local area network
  2. Metropolitan area network
  3. Wide area network
  4. storage area network

There are 2 kinds of network models

  1. Peer to peer
  2. Server based network

Different kind of topologies:

  1. Star
  2. Hierarchical
  3. mash
  4. Bus
  5. Ring

There are 2 types of models usually practiced as a network model:

  1. ISO mode
  2. TCP/IP model

Let’s learn about both of these models for a clear concept.

networking - TCP.png

As we can see from the ISO model the first three layers are application layer, Presentation layer and session layer. Application layer is usually used for transferring data. Among these three layers Application layer usually works on protocols like HTTP FTP SMTP DHCP etc. Presentation layer supports the graphical representation; session layer handles the communication between two devices. But in TCP/IP model all this works is covered in one application layer.

Transportation layer is the layer which is used for transmission control. Protocol used on this layer is transmission control, which is called Transmission control protocol. On this layer the basic work is to create segments and send those segments according to Numbers from one end to another end.

Network layer is known as Internet in TCP/IP model. This layer defines the logical address of an end device. This layer is responsible for creating packets and assigns number for sending Process. From this layer the network process get started by the packets.

The last two layers of ISO model are data link layer and physical layer. Data link layer is responsible for creating frames and associates with logical and physical addresses for accuracy. This layer actually works at the end user device.

The above explanations are Simple comparisons of ISO model and TCP/IP model. Also it defines the similarities of these two models.

On my future articles I will explain more about these layers with details explanation.

Next I would like to introduce few other technologies of creating networks and differing one network from another network. There are 4 types of network switch our intranet, internet, extranet and VPN.

Internet is basically a network that is local to a company. Only the users of the company will use that network for Different purposes. Extranet is an extend intranet, which is used for internal services and made available to know next real users or external business partners or remote locations And Internet is used when an unknown External users need to access internal resources in a network. VPN means virtual private network which helps connect two different networks.

There are lots of things you need to know about networking. In my next articles I will explain the other issues about networking.

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