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Nt1330 Unit 1

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1. Why we need Computers and what’s its importance?

1.1 Computers help us in saving our work without losing any data.
Computer memory is technically any type of electronic storage. And without this electronic storage, the computer has no benefit from startup to shut down, and all processes in between, a computer relies on several types of memory in order to function.
There are two types of memory that we use in the computer: Primary and Secondary memories. Primary memory which is the main storage stores all the data that we use in the computer, such as Hard disk drive. And the secondary data is the data that stores programs, such as: RAM (Random Access Memory). The difference between them that the secondary memory is deleted after the computer was turned off while the primary memory remains without losing any data.
The computer stores the data in form of binary numbers. For example, letters are converted to …show more content…
Servers provide access to network resources to all the users of the network. There are many different kinds of servers, and one server can provide several functions. For example, there are file servers, print servers, mail servers, communication servers, database servers, print servers, fax servers and web servers, to name a few.
• Clients - Clients are computers that access and use the network and shared network resources. Client computers are basically the customers(users) of the network, as they request and receive services from the servers.
• Transmission Media - Transmission media are the facilities used to interconnect computers in a network, such as twisted-pair wire, coaxial cable, and optical fiber cable. Transmission media are sometimes called channels, links or lines.
• Shared data - Shared data are data that file servers provide to clients such as data files, printer access programs and

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