(i) There are two types of fiber optic cables available
(ii) Single-mode (100BaseBx) another
(iii) Multimode (100BaseSX). 

Single mode ((100 Base Bx)) and Multimode((100 Base SX))

The parallel cables are used to connect to the printer and other disk drivers.

Two types of twisted pair cables are Unshielded Twisted Pair (UTP) and Shielded Twisted pair (STP).

(i) The crimping tool is a physical tool is used to connect the patch wire and the Ethernet connector.
(ii) The crimping tool looks like a small cutting handle with two mould of Ethernet part.

Computers can be connected on the network with the help of wired media such as unshielded twisted pair 
(i) Shielded Twisted pair
(ii) Co-axial cables and Optical fibre
(iii) Wireless media (Infra Red, Bluetooth, WiFi)

The four main components used in the Ethernet Cabling are
(i) Patch cable [Twisted pair]
(ii) RJ45 connector
(iii) Ethernet ports
(iv) Crimping tool

(i) A cable interconnecting two devices directly is known as a null modem cable.
(ii) The crossover Ethernet cable is an example of the null modem cables.

(i) The RJ45 connector looks similar like a telephone jack but it looks a slightly wider. 
(ii) In RJ45 the "RJ" stands for the Registered Jack and the "45" simply refers to the interface standard.
(iii)The RJ45 connector is a small plastic cube. It has eight pins.
(iv) It is connected to each end of the Ethernet cable. It is also known as 8P8C connector.
(v) These plugs (connector) are inserted into Ethernet port of the network card.

(i) If you require a cable to connect two computers or Ethernet devices directly together without a hub, then you will need to use a Crossover cable instead.
(ii) Here, the pairs of Tx and Rx lines are crossed.
(iii) It means pin 1 & 2 of the plug on one end are connected with pin 3 & 6 of the plug on other end, and vice versa (3 & 6 to pin 1 & 2).
(iv) The easiest way to make a crossover cable is to make one end to T568A colour coding and the other end to T568B.

(i) Cut the cable with desired length
(ii) Strip the insulation sheath about 1 inch from both ends of the cable and expose the twisted pair wires
(iii) After stripping the wire, untwist the smaller wires and arrange them into the proper wiring scheme, T568B preferred generally.
(iv) Bring the wires tighter together and cut them down so that they all have the same length (1/2 inch).
(v) Insert the all 8 colored wires into the eight grooves in the connector. The wires should be inserted until the plastic sheath is also inside the connector.
(vi) Use the crimping tool to lock the RJ45connector on the cable. It should be strong enough to handle manual traction. Now it is ready for data transmission.
(vii) Use a cable tester to verify the proper connectivity of the cable, if need.

1. The RJ45 connector is a small plastic-cup which will be used to connect the wire inside the connector and ready to connect the internet.
2. In RJ45 the "RJ" stands for the Registered Jack and the "45" stands for the number of interface standard in the cable.
3. Each RJ45 connector has eight pins and connected to each end of the Ethernet cable.
4. Since it has 8 position, 8-contact (8P8C) modular plug, it is also known as 8P8C connector.
5. These plugs (connectors) are then inserted into Ethernet port of the network card.

6. The RJ45 connector has eight small jack inside to connect eight small wires of the patch cable and these are of eight different colors.
7. Wiring schemes specifies how the wires to be connected with RJ45 connector.
8. There are 2 wiring schemes available to terminate the twisted-pair cable on each end, which are T-568A and T-568B.
9. Although 4 pairs of wires are available in the cable, Ethernet uses only 2 pairs: Orange and Green.
10. The other 2 colors (blue and brown) can be used ISDN (or) phone connections.