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Communications and Network by Mind Map: Communications
and  Network
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Communications and Network

Opjectives Overview

Discuss the purpose of the components required for successful communications and identify various sending and receiving devices

Describe the uses of computer communication

List advantages of using a network, and differentiate among LANs, MANs, and WANs

Differentiate between client/server and peer-to-peer networks, and describe how a P2P network works

Differentiate among a star network, bus network, and ring network

Describe the various network communications standards

Communications

Sending device

Communications channel

Receiving device

Uses of Computer Communications

Blogs

E-mail

Fax

Web

Internet

Video conferencing

Networks

Facilitating communications

Sharing hardware

Sharing data and information

Sharing software

Transferring funds

Network Communications Standards

Ethernet

Token ring

New node

TCP/IP

Wi-Fi

New node

Bluetooth

UWB

IrDA

RFID

New node

WiMAX

WAP

Communications Software

Help users establish a connection to another computer or network

Manage the transmission of data, instructions, and information

Provide an interface for users to communicate with one another

Communications Over the Telephone Network

Dial-up lines

Dedicated line

ISDN line

DSL

FTTP

T-carrier line

ATM

Communications Devices

DSL modem

A wireless modem uses the cell phone network to connect to the Internet wirelessly from a notebook computer, a smart phone, or other mobile device

Cable modem

A router connects multiple computers or other routers together and transmits data to its correct destination on a network

A hub or switch connects several devices in a network together

Home Networks

Connect to the Internet at the same time

Share a single high-speed Internet connection

Access files and programs on other computers

Share peripherals

Play multiplayer games

Connect game consoles to the Internet

Subscribe to and use VoIP

Communications Channel

The amount of data that can travel over a communications channel sometimes is called the bandwidth

Latency is the time it takes a signal to travel from one location to another on a network

Transmission media carries one or more signals

Broadband media transmit multiple signals simultaneously

Physical Transmission Media

Twisted-pair cable

Coaxial cable

Fiber-optic cable

Wireless Transmission Media

Cellular radio is a form of broadcast radio that is used widely for mobile communications

Microwaves are radio waves that provide a high-speed signal transmission

A communications satellite is a space station that receives microwave signals from an earth-based station, amplifies it, and broadcasts the signal over a wide area

Summary

Overview of communications terminology and applications

How to join computers into a network

Various communications devices, media, and procedures