Computer networks

(This article is part of a series network-basics)

So you want to make a computer to “talk” to another computer? Here the word “talking” would mean using some communications protocol (we are interested in the Internet Protocol) to make these computers to send data packets to each other. These packets will amount to chat messages, electronic mail and transferring a file from one machine to another and many more things.

computer network or data network is a telecommunications network that allows computers to exchange data. In computer networks, networked computing devices pass data to each other along data connections. Data is transferred in the form of packets. The connections (network links) between nodes are established using either cable media or wireless media. The best-known computer network is the Internet.
https://en.wikipedia.org/wiki/Computer_network

In computer networks you would expect to find sometimes “peers” communicating with each other and sometimes a server “serving” a file or other service to a client computer.

See
https://en.wikipedia.org/wiki/Network_packet
https://en.wikipedia.org/wiki/Peer-to-peer
https://en.wikipedia.org/wiki/Client–server_model

Computers (and other hosts such as smartphones, tablets, M2M etc) use networking-specific hardware to connect to network devices, such as Wireless Access Points and wired Switches. These first devices are typically called Local Area Networks (LAN). They are usually connected in some way or another to larger complexes called Wide Area Networks (WAN), via Routers and/or Firewalls.

As the names imply, a Local Area Network would cover the area of a single department’s office, a corporate site or a home. Wide Area Network refers to a nationwide/worl-wide network of corporate offices or The Global Internet.

See
https://en.wikipedia.org/wiki/Network_interface_controller
https://en.wikipedia.org/wiki/Local_area_network
https://en.wikipedia.org/wiki/Wide_area_network

Computer networks in general can be used for multiple applications and they also come with their security concerns; when a computer is a network, it can be accessed by other computers, in one way or another.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s