Network Media Guided Media transmit the data over

Network Media • Guided Media ( transmit the data over a wire) – Twisted Pair Cable – Coaxial Cable – Fiber Optic • Unguided Media ( Transmits the data through air) – Satellite Transmission – Microwave Transmission

Advantages & Disadvantage of twisted Pair • • - Advantage: It supports analog as well as digital transmission Inexpensive transmission media Disadvantages: Noise prone Transmission limits

Advantages & Disadvantage of Coaxial Cable Advantages: • High transmission rate • Higher noise immunity Disadvantages: - comparatively costly - security problem

Fiber Optics • Advantages: - high transmission rate - better noise immunity - it can transmit the data at longer distance - more data security - high transmission quality

Fiber optic (disadvantages) • Expensive • Difficult to configure • Expensive maintenance

Advantages of Satellites • The advantages of satellite communication over terrestrial communication are: § The coverage area of a satellite greatly exceeds that of a terrestrial system. § Transmission cost of a satellite is independent of the distance from the center of the coverage area. § Satellite to Satellite communication is very precise. § Higher Bandwidths are available for use.

Basics: Disadvantages of Satellites • The disadvantages of satellite communication: § Launching satellites into orbit is costly. § Satellite bandwidth is gradually becoming used up. § There is a larger propagation delay in satellite communication than in terrestrial communication.

Advantages Fiber Optic • SPEED: Fiber optic networks operate at high speeds up into the gigabits • BANDWIDTH: large carrying capacity • DISTANCE: Signals can be transmitted further without needing to be "refreshed" or strengthened. • RESISTANCE: Greater resistance to electromagnetic noise such as radios, motors or other nearby cables. • MAINTENANCE: Fiber optic cables costs much less to maintain.

Microwave Transmission • Microwave signals are also used to transmit the data & voice over the long distances through air without wires. In microwave transmission directional parabolic antennas are used to transmit the signals. Repeater are installed for sending and receiving signals along a line of sight.

Advantages & Disadvantages Advantages: • It involves less costly technology as compared to satellite • Its transmission rate is high than twisted pair, coaxial and fiber optic cables Disadvantages - Difficult to maintain repeaters - Signal noise