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INTRODUCTION

A computer network, often simply referred to as a network, is a collection ofcomputers and

devices interconnected by communications channels that facilitate communications among

users and allows users to share resources. Networks may be classified according to a wide

variety of characteristics. A computer network allows sharing of resources and information

among interconnected devices. Computer communication is the transmission ofdata from

one computer to another, or from one device to another. A communications device, therefore,

is any machine that assists data transmission. For example, modems, cables, and ports are all

communications devices. Communications software refers to programs that make it possibleto transmit data.

http://en.wikipedia.org/wiki/Computershttp://www.webopedia.com/TERM/D/data.htmlhttp://www.webopedia.com/TERM/C/computer.htmlhttp://www.webopedia.com/TERM/D/device.htmlhttp://www.webopedia.com/TERM/M/modem.htmlhttp://www.webopedia.com/TERM/P/port.htmlhttp://www.webopedia.com/TERM/C/communications_software.htmlhttp://www.webopedia.com/TERM/P/program.htmlhttp://www.webopedia.com/TERM/P/program.htmlhttp://www.webopedia.com/TERM/C/communications_software.htmlhttp://www.webopedia.com/TERM/P/port.htmlhttp://www.webopedia.com/TERM/M/modem.htmlhttp://www.webopedia.com/TERM/D/device.htmlhttp://www.webopedia.com/TERM/C/computer.htmlhttp://www.webopedia.com/TERM/D/data.htmlhttp://en.wikipedia.org/wiki/Computers

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CONTENT

No. Title Page

1. Introduction

2. Mobile Computing

Definition of Mobile Computing Specification of Mobile Computing Services of Mobile Computing Frequencies of Mobile Computing

3. Internet Technology and Services

VOIP BLOG

4. Types of network

PAN VPN WLAN WIMAX

5. Conclusion

6. Reference

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2.0 Mobile Computing

2.1 Definition of Mobile Computing

Mobile computing is being able to use a computing device even when being mobile and

therefore changing location. Portability is one aspect of mobile computing. Another meaning

for Mobile Computing would be work from a non-fixed location using portable computing or

communications devices such as notebooks, palmtops, smart cell phones and PDAs.

2.2 Specification of Mobile Computing

Specification Mobile computing represents a major point of departure from the traditional

distributed computing paradigm. The potentially very large number of independent

computing units, a decoupled computing style, frequent disconnections, continuous position

changes, and the location-dependent nature of the behavior and communication patterns

present designers with unprecedented challenges in the areas of modularity and dependability.

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2.3 Services of Mobile Computing

Mobility services can be classified into two groups.

First there are services designed to overcome common restrictions of mobile computing,

which arise mainly from the slowness, insecurity and instability of wireless or analogous

connection lines utilized by the mobile user. These services are called common mobility

services (CMS). Examples are connection management, caching or encryption services. The

second group of services handles the management and administration of mobile users moving

around and connecting their portables to networks at different places. These mobility

management services (MMS) include tasks such as the authentication of users, accounting

and billing issues or profiling of the users habits. The tasks necessary to adapt certain

existing applications to mobile usage are implemented by high level services, which are

called special mobility services(SMS). Special mobility services adapt existing services to the

mobile conditions. For example to allow remote database access over a wireless connection

line one has to take special care of possible frequent connection losses especially in the

context of the state of the database. Viewing services as distinct building blocks, we are able

to sketch an architecture for a mobility services enhanced system.

Group 1 Group 2

designed to overcome

common restrictions of

mobile computing

handles the management and administration of mobile

users moving around and connecting their portables to

networks at different places

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2.4 Frequencies of Mobile Computing

Bluetooth is a proprietary open wireless technology standard for exchanging data over shortdistances from fixed and mobile devices, creating personal area networks (PANs) with high

levels of security. Bluetooth is managed by Bluetooth Special Interest Group. Bluetooth

technology relies on two things, a radio frequency technology and the protocol software

enabling it to transmit data to other devices. Bluetooth-capable devices can transmit data to

other devices not within the line of sight of the user.

EXAMPLES OF MOBILE COMPUTING

Smart phones which are the ideal productivity solution for both voice and data for your

mobile workforce. Theyll be able to stay in touch with the people and information that

matter most. Access email, instant message, access the Internet, run business applications and

more. Communicate your way: Call, email, instant message, or text message, all with one

device

http://en.wikipedia.org/wiki/Open_standardhttp://en.wikipedia.org/wiki/Wirelesshttp://en.wikipedia.org/wiki/Personal_area_networkhttp://en.wikipedia.org/wiki/Personal_area_networkhttp://en.wikipedia.org/wiki/Wirelesshttp://en.wikipedia.org/wiki/Open_standard

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3.0 INTERNET TECHNOLOGY AND SERVICES

3.1 EXPLAIN VOIP

Voice over Internet Protocol (Voice over IP, VoIP) is a transmission technologies for

delivery ofvoice communications and multimedia sessions over Internet Protocol (IP)

networks, such as the Internet. Other terms frequently encountered and often used

synonymously with VoIP are IP telephony, Internet telephony, broadband telephony

and broadband phone.

3.2 EXPLAIN BLOG

A blog is a lot like a journal except it is generally intended to be read by others. The topics

for blogs vary greatly; some being about day to day activities and others taking a more

corporate or political slant. There is no defined or widely accepted format and so blogs range

from one liners that the author adds every few hours to relatively long, well thought out

arguments for or against a topic of interest. Blog is also used to share information and your

opinions into the web.

http://en.wikipedia.org/wiki/Voice_communicationhttp://en.wikipedia.org/wiki/Multimediahttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/Internethttp://en.wikipedia.org/wiki/Internethttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/Multimediahttp://en.wikipedia.org/wiki/Voice_communication

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4.0 TYPES OF NETWORK

4.1 PAN

Personal Area Network (PAN) is a computer network used for communication among

computer devices close to one person. The devices may or may not belong to the person in

question. The reach of a PAN is typically a few meters. PANs can be used for communication

among the personal devices themselves, or for connecting to a higher level network and the

Internet . Personal area networks may be wired with computer buses such as USB.

4.2 VPN

Virtual Private Network, VPN is a type of network that allows a user to connect to a

network through a tunneling protocol and access internal internet and intranet web sites and

e-mail. Virtual Private Networks are commonly used to allow an employee with a large

company to connect to the companys intranet.

4.3 WLAN

A wireless LAN , Wireless Local Area Network, sometimes referred to as LAWN, local

area wireless network is one in which a mobile user can connect to a local area network LAN

through a wireless connection. A WLAN also links two or more devices using some wireless

distribution method and usually providing a connection through an access point to the wider

internet. This gives users the mobility to move around within a local coverage area and still

be connected to the network.

4.4 WIMAX

WIMAX is the industry term for a long-range wireless networking standard. WIMAX

technology has the potential to deliver high-speed Internet access to rural areas and other

locations not serviced by cable or DSL technology. WIMAX also offers an alternative to

satellite Internet services. Data rates for WIMAX can reach up to 75 megabits per second

Mb/s. A number of wireless signaling options exist ranging anywhere from the 2 GHz range

up to 66 GHz.

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5.0 CONCLUSION

Computer network make us connect to the world much easier. Computer Communicationalso let us connects with other people much easier with the help of communication devices.

Mobile Computing had make our lives much more easier where it could function as a

computer and it is small in size where will not take much space.

6.0 REFERENCE

http://en.wikipedia.org/wiki/Computer_network

http://www.google.com.my/search?hl=en&rlz=1C1ASUT_enMY399&biw=1366&bih=600&site=searc

h&tbm=isch&sa=1&q=BLOG&aq=f&aqi=g10&aql=&oq=

http://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubi

comp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-

4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtg

http://en.wikipedia.org/wiki/Computer_networkhttp://en.wikipedia.org/wiki/Computer_networkhttp://www.google.com.my/search?hl=en&rlz=1C1ASUT_enMY399&biw=1366&bih=600&site=search&tbm=isch&sa=1&q=BLOG&aq=f&aqi=g10&aql=&oq=http://www.google.com.my/search?hl=en&rlz=1C1ASUT_enMY399&biw=1366&bih=600&site=search&tbm=isch&sa=1&q=BLOG&aq=f&aqi=g10&aql=&oq=http://www.google.com.my/search?hl=en&rlz=1C1ASUT_enMY399&biw=1366&bih=600&site=search&tbm=isch&sa=1&q=BLOG&aq=f&aqi=g10&aql=&oq=http://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/url?sa=t&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fubicomp.teco.edu%2Fmobile_computing.html&ei=kfOuTcKuL8nVrQfZ-4X1CQ&usg=AFQjCNEL8rV3MdVJhGT-YUXU-0wfioHxtghttp://www.google.com.my/search?hl=en&rlz=1C1ASUT_enMY399&biw=1366&bih=600&site=search&tbm=isch&sa=1&q=BLOG&aq=f&aqi=g10&aql=&oq=http://www.google.com.my/search?hl=en&rlz=1C1ASUT_enMY399&biw=1366&bih=600&site=search&tbm=isch&sa=1&q=BLOG&aq=f&aqi=g10&aql=&oq=http://en.wikipedia.org/wiki/Computer_network