internet

assalamualaikum,

The Internet is a global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions. According to Internet World Stats, as of December 31, 2011 there was an estimated 2,267,233,742 Internet users worldwide. This represents 32.7% of the world's population.
Unlike online services, which are centrally controlled, the Internet is decentralized by design. Each Internet computer, called a host, is independent. Its operators can choose which Internet services to use and which local services to make available to the global Internet community. Remarkably, this anarchy by design works exceedingly well. There are a variety of ways to access the Internet. Most online services offer access to some Internet services. It is also possible to gain access through a commercial Internet Service Provider (ISP).

Who Owns the Internet?

No one actually owns the Internet, and no single person or organization controls the Internet in its entirety. The Internet is more of a concept than an actual tangible entity, and it relies on a physical infrastructure that connects networks to other networks.
Recommended Reading:  Who Owns the Internet?

Is Web and Internet the Same?

The Internet is not synonymous with World Wide Web. The Internet is a massive network of networks, a networking infrastructure. It connects millions of computers together globally, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet. The World Wide Web, or simply Web, is a way of accessing information over the medium of the Internet. It is an information-sharing model that is built on top of the Internet.

power point

Today I was learned how to use software in our computer like Microsoft power point.Other then that, we also will have a quiz about that software. My lecturer did a lot of activities to us that was related to our lesson.Mr. azamuddin was a good lecturer sometimes he did a lot of joke that made all student laugh and in he class I  never felt bored.In there have some picture about Microsoft power point.It's about how to use it?

microsoft excel

Assalamualaikum,

This week I have been learn about Microsoft excel.That we usually use this to calculate something like to calculate mathematics and grade for student mark or result.Mr .azam did the same thing with call name of the student to came in front and followed he instruction .In this Microsoft it quiet hard for me because I never know how to use it and why I need to use It.I hope U will get some knowledge went I show you how to use it.

microsoft word

Today I was learn how to used the Microsoft word .My lecturer give us chance to improve our self with call our name and go to in front of class and follow he instruction how to use the Microsoft word.In there we was learn so many thing.Most of us don't know how to us it very well.When my lecturer give the instruction to one of the student .like can you paste some picture in there and after that,the student was copied the picture that was mr.azamudin when he was young.

COMPUTER NETWORK

Assalamualaikum,

This week I have been learn about computer network. It is simply a group of interconnected computers. Two or more computers are connected via hardware or software, and able to communicate with each other. Example of a computer network, the Internet, ATM, school network, e-banking, home network, etc. 

Network computer

Major components of a computer network:

–      Communication Media

–      Interconnecting Devices

–      Computers

–      Networking Software

–      Applications

Data transmission characteristics

Bandwidth (rate of transmission)

The rate at which the data can be transmitted is measured in Bits/sec.Bandwidth is the range that a medium can correctly transmit data. The rate at which the signal changes is known as Baud rate

Analog or Digital (type of signal)

Analog transmission is takes the form of continuous waves transmitted over a medium at a certain frequency rage.Digital transmission is sends data in the form of bits

Serial or Parallel (order of bits)

Serial transmission is all of the data bits are transmitted one bit after another in a continuous line and Parallel transmission is data bits are sent at the same time along multiple paths.

Communication Channel

To send data through the channel requires some type of transmission media, which may be either physical or wireless.

Network Medium

•       Computers share access to common network medium that carries signals from one computer to another.

•       Medium may be physical cable, such as twisted pair, coaxial, or fiber-optic.

• Medium may also be wireless. 

PHYSICAL MEDIA

•       Twisted-pair cable – consists of two independently insulated wires twisted around each other (least expensive type of cable—the kind that is used in many telephone systems)

•       Coaxial cable – consists of an insulated center wire grounded by a shield of braided wire (the primary type of cabling used by the cable television industry;  it is more expensive than twisted pair)

•       Fiber-optic cable – contains hundreds of clear fiberglass or plastic fibers (threads) (made from thin, flexible glass tubing; bandwidth is greater, so it can carry more data; it is lighter than metal wires and is less susceptible to interference; it is fragile and expensive)

•       ISDN line – a special digital telephone line that transmits and receives information at very high speeds

WIRELESS MEDIA

•       Microwave system – transmits data via high-frequency radio signals through the atmosphere

•       Satellite system – receive transmitted signals, amplify them, and then transmit the signals to the appropriate locations

•       Cellular technology – uses antennae resembling telephone towers to pick up radio signals within a specific area (cell)

•       Infrared technology – transmits data as infrared light waves from one device to another, providing wireless links between PCs and peripherals

TYPES OF NETWORK

•       Network in small geographical Area (Room, Building or a Campus) is called LAN (Local Area Network)

•       Network in a City is call MAN (Metropolitan Area Network)

•       Network spread geographically (Country or across Globe) is called WAN (Wide Area Network)

Peer-to-Peer Networking Advantages

•       Easy to install and configure

•       No dedicated server

•       Users control own shared resources

•       Inexpensive to purchase and operate

•       No additional equipment or software

•       No dedicated administrators

•      Works best with 10 or fewer users

Peer-to-Peer Networking Disadvantages

•       Security applies to single resource at a time

•       Users may have many different passwords

•       Must back up each machine individually

•       Machine sharing resources may suffers reduced performance

•       No centralized organization scheme to locate or control access to data

•       Does not usually work well with more than
10 users

I  HOPE U WILL GET SOME INFORMATION FROM MY EXPLAINATION