What are the Computer Networks Basics?

Computer Networks Basics

Networks are two set of computer or devices connected through a medium with source medium to share and communicate data. Establishment of a network contains various factors. Preparing a simple connection physically an Ethernet cable, switch, and wireless router are the essential parts. Following are the two necessary types for communication System of Computer Networks

Basics of Computer Networks?

  1. Wireless Communication Network

  2. Cable Communication Network

Wireless Communication Network

This requires more frequency to set up. Wireless communication is nowadays the most common source of integration. However, wireless communication also needs some equipment source to establish data connection as well.

Cable Communication Network

The arrangement of a modern technology card named as NIC (Network Interface Card) installed on the main board of the computer with a slot seems like a telephone jack point for connecting two or more computer in the same or different networks using cable medium.

What is the Physical Connection of the Network

As aforesaid, cables are connected through NICs (Network Interface Card). Cable connection basically used RJ45 (Registered Jack) connection which is worldwide manufacturing standardization of network connection. Similarly, a telephone line is called RJ11. Both connection wires differentiate each other with a number of wires in it. A Phone line includes 4 or 6 wires and a network cable RJ45 includes 8 wires. Nowadays cables are used of category 6 or category 5 (CAT-5 or CAT-6).

8 widely Used Categories of Digital Network Connection

Sr No. Cable Categories Utilization
1. Low-Speed Cable (less=<1MHz) A general telephone line
2. Analog Telephone Lines( less=<10MHz) A higher sophisticated form of a telephone line
3. Higher than 16 MHz or 100Mbps Sound transmission of voice transmission line
4. 20MHz or 100Mbps Ethernet card transmission line
5. 100Mhz or 100Mbps Widely used medium source
6. 100Mbps or 100Gbps Same as above widely used common network connections
7. 10Gbps Very effective medium source of networks
8. 40Gbps A very higher speed networks (not common such as Fiber optics)

Note: usually procedure the cable is UTP cable refers to Unshielded Twisted pair Cable

As want to connect two computers, a simple connection of direct cable can be justified. A crossover cable can be used the source of connecting two computers in a straight line. But if there are more than 2 computers some the devices would be helpful such as Routers, Hub, Switches, and Repeaters.

The Hub:

Hub is a simple small box-shaped electronic distribution channel. Box contains almost 4 ports up-to 24 with the specification of RJ45 jack. A Hub box can lead various computers at one time. It depends upon the description of Hub. More than 1 Hub within the same network can also be utilized. This procedure is called stacking. Hubs are low-cost and plug and play set up. This device does not have a smart specification and data files simply travel from ports in the form of packets.


Repeaters are the devices being used to boost up or generate influential signals. In case of expansion of connection is required (for example more than 100 meters UTP) then repeaters are the essential part. Following are the types of repeaters.

  • Amplifier

Amplifiers are simple and only boost up the signals excluding noise.

  • Signal Booster

Signal booster re-consider the signals and consequently do not transmit noise.

  • Switches

These can be called an intelligent Hub. This device works smartly. Its shapes look exactly like Hub box with ample difference. This device works and transmits data packets only those computers which it wants to go.

  • The Router

The routers are sophisticated devices similar to Hub and switches. Router devices are self-administrated and permit you to route data transmission by programming.