Fundamentals in I.T. Part 4

Full Back Up

A complete backup of everything you want to backup.

Incremental backup

An incremental backup is a backup of a set of specified files, often a disk's entire contents, that includes only those files modified since the last incremental backup.

What is the difference between Sequential Access and Random Access?

Comparing sequential versus random disk operations helps to assess systems efficiency. Sequential access is the type of memory mostly used for permanent storage, whereas, random access memory is used for temporary storage.

Example of Sequential Access

Magnetic Tape Hard disk CD rom

Example of Random Access

Ram

Internet

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. Information that travels over the Internet does so via a variety of languages known as protocols.

World Wide Web

The World Wide 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. The Web uses the HTTP protocol, only one of the languages spoken over the Internet, to transmit data. the Web utilizes browsers, such as Internet Explorer or Firefox, to access Web documents called Web pages that are linked to each other via hyperlinks. Web documents also contain graphics, sounds, text and video.

Differential backup

The backup software looks at which files have changed since you last did a full backup. Then creates copies of all the files that are different from the ones in the full backup.

Difference between internet and World Wide Web

The internet is a massive network or networks that connects millions of computers together globally while the world wide web is just a way of accessing info over the internet, the world wide web is built on top of the internet

Sequential Access

a process used for retrieving data from a storage device. It is also known as serial access. In sequential access, the storage device moves through all information up to the point it is attempting to read or write.

Example of non-volatile memory

f-ram

Random Access

form of computer data storage. A random-access memory device allows data items to be accessed (read or written) in almost the same amount of time irrespective of the physical location of data inside the memory.

Volatile Definition

memory of a computer that is lost when it is turned off

Example of Volatile memory

ram

Non-volatile Definition

secondary memory of a computer that is not lost even when turned off