Revolutionization of Computers and Wireless Technology

By: Vincent Mays

The Wireless RevolutionThe Wireless Revolution

Most dramatic change in connectivity comm in the past 5 years has been mobile and wireless phones

Est. over 600 million mobile phones are in use worldwide

Allows us to stay together at anytime and any place

Most dramatic change in connectivity comm in the past 5 years has been mobile and wireless phones

Est. over 600 million mobile phones are in use worldwide

Allows us to stay together at anytime and any place

Communication Systems

• Electronic systems that transmit data from one location to another

• Whether wired or wireless every communication system has 4 basic elements

Four Basic ElementsFour Basic Elements

1) Sending and receiving devices 2)Connective devices 3)Communication Channel 4)Data transmission

Physical Connections

» Telephone Lines» Coaxial Cable» Fiber Optic» - 26,000 times the transmission capacity

of twisted pair » - compared to coaxial its faster lighter

and more reliable when it comes to transmitting data

Wireless Connections

Satellite are used to send and receive large data

Uplinks are you to send data

Downlinks are you to receive data

Modems

Short for modulator-demodulator

Modulator- process from converting digital to analog

Demodulator- process from converting analog to digital

Type of Connections

Dial up service- standard telephone lines and conventional modems

Cable Modems- use existing tv cables to provide high speed connections

ProtocolsIdentification- it’s a numeric addressReformatting- info sent or transmitted

across the internet usually travels through numerous interconnected networks

Configurations

Topology- network arranged or configured in several different ways

Ring Network- each device is connected to two other devices forming a ring

Strategy

Terminal Network System

Client Server Network System

Organizational InternetsOrganizational Internets

Intranet- private network within an organization that resembles the internet

Extranets- private network that connects more than one organization

Firewalls- security system designed to protect an organization network against external threats

Intranet- private network within an organization that resembles the internet

Extranets- private network that connects more than one organization

Firewalls- security system designed to protect an organization network against external threats

Terms

Client- a node that requests and uses resources available from other nodes

Server- a node that shares resources with other nodes

Host Computer- a large centralized computer, usually a minicomputer or a mainframe