What is a network? - Learn Networking Concept

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What is a network?

A network is a set of interconnected devices that allow devices to share resources and transfer data to other devices on or off the network. Network devices include hubs, bridges, routers, and switches. Network media includes copper, fiber optic cables, and wireless. A network uses many different types of protocols to exchange data (such as ethernet)

To create a network we have to have a number of basic additives which include

Network Devices Explained | Hub, Bridge, Router, Switch

When we communicate about networks gadgets we may think approximately a group of computers connected together, however, a network also can include other items along with servers, printers, game consoles together with the ps4, mobile phones, and devices together with the amazon echo, also called a voice controlled intelligent personal assistant. generally speaking, we name those gadgets are referred to as “nodes” or “hosts”.

Network Media

The Network Media must be linked to each different in some manner. This connection can be within the shape of copper wire, communicating via electrical signals, fiber-optic cables, speaking thru light pulses, or a wireless connection using radio waves.

The cables or signals used to attach the host to the Network are referred to as the network media, or medium.

In this video, learn how network media can allow you to send any video anywhere at any time without overwhelming your network.

Network Interface Card NIC

As there are distinctive forms of network media the network hosts have to be ready with an appropriate interface to be able to make the relationship. in a few cases, a network adapter is an integrated part of the motherboard, this is frequently the case while connecting to copper-based media which includes twisted pair cable. when connecting to a distinctive kind of media, for example, fiber-optic, an engineer will extra than likely be required to install an additional network adapter to offer a suitable connector.

The function of the network interface card is pretty complex. it has to convert the digital signals from the tool into a sign this is appropriate to be transmitted via the network medium.

Common Network Ports and Protocols

Finally, we want aprotocols. this is an agreed set of policies on how facts are formatted and sent onto the network. if theprotocolsare special then the verbal exchange can not be made among the devices. this is just like trying to speak to a person who doesn’t talk your language.

A port? In pc hardware, a port is a jack or receptacle for a few other peripheral devices to plug into. These are standardized for every cause. Some not unusual ports are Universal Serial Bus ports, USB-C ports, Ethernet ports, or DisplayPorts.

Protocols? A communication protocol is a system of regulations that allows two or more entities of a communications gadget to transmit data thru any form of a version of a physical quantity. The protocol defines the regulations, syntax, semantics, and synchronization of verbal exchange and possible error restoration methods.

What is the difference between ports and protocols? A port is only a channel that you choose for the conversation, and the protocol determines how the verbal exchange is accomplished. A sure protocol normally uses a selected port, like port 80 for HTTP, or port 21 for FTP.

List of Common Network Ports and Protocols

Learn about various network protocols in this video - Ethernet, PPP, TCP, IP, UDP, HTTP, HTTPS, FTP, SSL, Telenet, SMTP, IMAP and POP3

There are 65535 potential port numbers, although not all are common. A few of the most commonly used ports, as well as their associated network protocol, are:

  • Ports 20 and 21: File Transfer Protocol (FTP).
  • Port 22: Secure Shell (SSH).
  • Port 25: Simple Mail Transfer Protocol (SMTP).
  • Port 53: Domain Name System (DNS).
  • Port 80: Hypertext Transfer Protocol (HTTP).
  • Port 123: Network Time Protocol (NTP).
  • Port 443: HTTP Secure (HTTPS).
  • Port 3389: Remote Desktop Protocol (RDP).

Let’s recall the following instance

Here we've four COMPUTERS with 4 distinct OPERATING SYSTEMS. However, verbal exchange remains feasible so long as the COMPUTERS are configured to use identical PROTOCOLS.

The PROTOCOL dedicates how the statistics are assembled, PACKAGED, and sent onto the Network, it additionally dictates how it miles UNPACKAGED while it is acquired through some other COMPUTER at the equal Network. The PROTOCOL gives the policies of communication among Network HOSTS.

To summarise, there are four components that make up a Network, and those are, the NETWORK DEVICES that are referred to as NODES or HOSTS, the NETWORK MEDIA, that's CABLE or WIRELESS MEDIA that connects the devices collectively.

A NETWORK INTERFACE that is used to connect the HOSTS to the MEDIUM, and translate the DIGITAL SIGNAL into a signal that can be transmitted through the medium, and a common PROTOCOL, this is a commonplace language or set of regulations utilized by the HOSTS to communicate

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