Internet and the World Wide Web Internet is an infrastructure Different components have made it into one huge network Such network type is called Wide Area Network or WAN Large geographic span World Wide Web is a collection of websites …
Computers can only understand machine code, which is in binary form of 1 and 0. A program written in a programming language must be translated to machine code to ensure that the computer can understand it. We tell computer through …
Types of Software Series of instructions telling a computer what to do. Created using programming languages They can be put into different categories System software Manages the running of a hardware Manages other software Provides communication between hardware and software …
Network Hardware Network means computer and devices that are joined together using wireless technology Network interface card (NIC), router, and some transmission media required Computer has an NIC within it It can be attached separately as well It can be …
Data Storage Can be temporary or permanent Primary Storage This is the storage that the CPU can access directly 2 main types of primary storages: RAM and ROM RAM means random access memory ROM means read only memory Characteristics of …
The role of the CPU Central Processing Unit is the brain of the computer Some devices have it in the form of a microprocessor Sometimes, microprocessor has sensors and actuators installed as well, which makes it an embedded system to …
Computer Architecture Focuses on how a computer actually works. Important components Central Processing Unit (CPU) Also called processor or microprocessor A computer cannot work without this part Usually a single microchip contains the CPU as an integrated circuit. All processing …
The Purpose of Encryption Public network based data transmission has a risk of interception A hacker in such circumstances is called an eavesdropper Encryption can lower the risk Encryption means converting data into unreadable form It DOES NOT prevent interception …
Data transferring from one device to another may not be perfect. Here, interference can occur Data loss Data gained Data changed Password not transmitted correctly, it won’t work Address not transmitted correctly, things won’t be received Accuracy of data is …
Data Packets Sending data over long distances Requires breaking data in data packets Also called datagrams Usually very small 64 KiB Easier to control over long continuous data stream of data Each packet can be sent through a different route …