Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices in order to store data that can't be electronically modified.

RAM (Random Access Memory) is a part of the computer's Main Memory or primary memory which is directly accessible by the CPU whenever needs to retrieve data.

RAM (Random Access Memory) is a part of the computer's Main Memory which is directly accessible by the CPU whenever needs to retrieve data. RAM contains data only as long as the computer is switched on. Hence, it is also called Volatile memory.

ROM is non-volatile memory as it doesn't erase data even after reboot.

Static memory devices are semiconductor memory devices in which stored data is retained as long as power is applied. SRAM (static RAM) is a type of such random access memory (RAM) that retains data bits in its memory as long as power is being supplied.

The external cache memory is an area between the CPU and the system bus where some very high-speed memory is located to store frequently requested instructions. Integrated Circuit (IC) is a such hardware component that stores frequently-used data outside the main memory (RAM) of a computer to ensure faster access to stored data and reduces processing times by minimizing the need for the CPU to access the memory.

Phishing is a malicious attack through e-mail setting a bug with an enticing request or lures with an attempt to steal sensitive information.

Firewalls are one of the most fundamental network security appliances. Like many other security devices, firewalls can come in hardware or software forms.

Firewalls protect computers, websites and web applications from unauthorized access by blocking incoming traffic that is not associated with a known website or web application.

When your computer is started, then BIOS works first. The BIOS starts the monitor and keyboard, and does some basic checks to make sure the computer is working properly.