COMPUTER NETWORKS AND COMMUNICATIONS

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THE LATEST DEVELOPMENT IN NETWORK AND COMMUNICATION

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2.0 Computer Network and Communication

Meaning of computer network:

A computer network is system of interconnected

computers and peripheral devices. For example it

may connect computer, scanner, printer, and

cameras.

Meaning of communication:

Communication is about the transfer of information

from sender, across a distance, to a receiver.

2.3 Mobile Computing Mobile computing or nomadic computing is a generic term

used to describe the ability to use technology to wirelessly

connect to and use centrally located information and / or

application software via small portable and wireless

computing and communication devices such as laptop and

handheld computers.

2.4 Definition of mobile computing

Mobile computing is about the new strategies of

computing that utilities portable or mobile

devices and wireless communication networks. There

are various type of mobile computing devices such

as :

1. Notebook computer

2. Tablet PC

3. Handheld computer

4. PDA

5. Smartphone

2.5 Specification, services, and frequencies of

Mobile Computing

Specification

BODY Dimensions

152.6 x 75 x 9.2 mm (6.01 x 2.95x 0.36 in)

Weight

171 g (6.03 oz)

 DISPLAY Type IPS LCD capacitive touch-screen,

16M colorsSize 1440 x 2560 pixels, 5.5 inches

(~534 ppi pixel density) Multi-touch

Yes

Protection

Corning Gorilla Glass 3

  - ColorOS UI 

SOUND Alerttypes

Vibration, MP3, WAV ringtones

Loudspeaker

Yes, with stereo speakers

3.5mm jack Yes  - OppoMaxxAudio

 MEMORY Card

slotmicroSD, up to 128 GB

Internal 32 GB, 3 GB RAM

CAMERA Primary 13 MP, 4160 x 3120 pixels,autofocus, dual-LED flash,

Features Geo-tagging, touch focus, facedetection, panorama, HDR

Video 2160p@30fps, 1080p@60fps,720p@120fps, 

Secondary

5 MP

FEATURE OS Android OS, v4.3 (Jelly Bean)Chipse

tQualcomm MSM8974AC Snapdragon

801CPU Quad-core 2.5 GHz Krait 400

GPU Adreno 330Sensor

sAccelerometer, gyro, proximity,compass

Messaging

SMS (threaded view), MMS, Email,Push Email, IM

Browser

HTML5

Radio NoGPS Yes, with A-GPSJava Yes, via Java MIDP emulatorColors White, Black, Astro Black  - Fast battery charging:75%in 30 min

-Active noise cancellation with

dedicated mic

- MP40/H.264/WMV player

- MP3/eAAC+/WMA/WAV player

- Document viewer

- Photo viewer/editor

- Voice memo/dial/commands

 

BATTERY   Li-Po 3000 mAh batteryStand-byTalktime

 

Services

DATA GPRS YesEDGE YesSpeed HSPA, LTEWLAN Wi-Fi 802.11 b/g/n, Wi-Fi

Direct, DLNA, Wi-Fi hotspotBluetooth

v4.0, A2DP

NFC YesUSB microUSB v2.0, USB Host

Frequency

GENERAL 2GNetwork

GSM 850 / 900 / 1800 / 1900 -all models

3GNetwork

HSDPA 850 / 900 / 1900 / 2100 -international model

  HSDPA 850 / 900 / 1700 / 1900 /2100 - Mexico & US model

4GNetwork

LTE 800 / 1800 / 2100 / 2600 -international model

  LTE 700 / 1700 / 2100 - Mexico &US model

3.3 Internet Technology and Services

Internet technology is a broad range of

technologies for web development, web production,

design, networking, telecommunication and e-

commerce.

Services include:

1. Email capabilities

2. A variety of software applications for

secured communications.

3. Mobile security services

4. Mobile data, voice and video systems.

3.4 VoIP (Voice over Internet Protocol)

VoIP is one of the internet technologies that

allow a user to make telephone calls using a

broadband Internet connection instead of a regular

(or analog) phone line. VoIP is a method for

taking analog audio signals and turning them into

digital data that can be transmitted over the

Internet.

3.5 Blog

A blog is one of the popular activities on the

Internet and publicly shared. The authors

frequently update the content on a regular basis.

A blog is usually referred to the text produced by

the author. These text is all about the author’s

thought and experience.

4.0 Type Of Network

4.5 Personal Area Network (PAN)

PAN is a computer network used for communication among

computer devices including PCs, laptops, printers,

telephone, digital cameras, mobile phone, and Personal

Digital Assistant.PAN may be wired with USB port, Fire wire

port Infrared (IrDA) and Bluetooth technologies.

4.6 Virtual Private Network (VPN)

VPN is a network that uses a public telecommunication

infrastructure, such as Internet to individual with secure

access to their organization’s private network. These

network transmitted data packets across a public network.

4.7 Wireless Local Area Network (WLAN)

WLAN is a type of LAN that uses a high-frequency radio

waves to communicate between nodes. These network also

improve user mobility, speed, and scalability to move

around within a broad coverage area and still connected to

the network.

4.8 WorldWide Interoperability for Microwave

Access (WiMAX)

WiMAX is a technology that connect WiFi hotspots to the

Internet. WiMAX would operate similar to WiFi but at a

higher speeds, between greater distance and for a greater

number of users.

6.0 Conclusion

We can conclude that computer network give a big

impact in our life include in educational sectors,

business, and other organization .We can see this all

changes all over the world. People connect to each other

at the fingers tip. This is some advantages of computer

network that make people life easy and peace from any

problem.

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