Question

WRITE A SHORT NOTE ON THE FOLLOWING:-

1) VIRUS

2) HTTP

3) ANTIVIRUS SOFTWARES

4) IMAP

5) DATA BACKUP.

PLZ GIVE FULL DETAILED INFORMATION OF THE TOPICS.

Answer 1

Hey!

Virus:

A virus is a software that aims to alter the normal functioning of the computer, without the permission or knowledge of the user. Viruses, usually replace files executable by others infected with the code of this. Viruses can destroy, intentionally, the data stored in a computer, although there are also other more harmless, which only cause discomfort.

Computer viruses basically have the function of propagating through software, they are very harmful and some also contain a harmful load (payload) with different objectives, from a simple joke to major damage to the systems, or block the computer networks generating useless traffic. The operation of a computer virus is conceptually simple. A program that is infected is executed, in most of the cases, due to the user's lack of knowledge. The virus code remains resident (hosted) in the computer's RAM, even when the program that contained it has finished executing. The virus then takes control of the basic services of the operating system, infecting, later, executable files that are called for execution. Finally, the virus code is added to the infected program and recorded on the disk, which completes the replication process.

HTTP:

The Hypertext Transfer Protocol is the communication protocol that allows the transfer of information on the World Wide Web. HTTP was developed by the World Wide Web Consortium and the Internet Engineering Task Force, a collaboration that culminated in 1999 with the publication of a series of RFCs, the most important of which is RFC 2616 that specifies version 1.1. HTTP defines the syntax and semantics that the software elements of the web architecture (clients, servers, proxies) use to communicate. HTTP is a stateless protocol, that is, it does not store any information about previous connections. The development of web applications frequently needs to maintain state. For this, cookies are used, which is information that a server can store in the client system. This allows web applications to institute the notion of session, and also allows users to be tracked since cookies can be stored on the client for an indefinite period of time.

Antivirus soft:

Antiviruses are programs whose objective is to detect or eliminate computer viruses. With the passage of time, the emergence of more advanced operating systems and the Internet. antivirus programs have evolved towards more advanced programs that, in addition to searching for and detecting computer viruses, block them, disinfect files and prevent infection. Currently they are able to recognize other types of malware such as spyware, worms, trojans, rootkits, among others.


IMAP:

IMAP is the abbreviation of "Internet Message Access Protocol". IMAP offers you the possibility to manage your E-Mails directly on the E-Mail server, that is, if you choose the IMAP protocol to establish your email account in your E-Mail program, the emails you receive will not be downloaded in your computer, but you will simply receive a list of your messages and their corresponding issues. Generally, only the E-Mail headings will appear (this option can also be modified in the respective E-Mail programs).


Backup data:

Backup data is a copy of the original data outside the infrastructure that is made in order to have a means to recover them in case of loss. Backup copies are useful in the face of different events and uses: recovering computer systems and data from a computer, natural or attack catastrophe; restore a small amount of files that may have been accidentally deleted, corrupted, infected by a computer virus or other causes; save historical information more economically than hard drives and also allowing the transfer to locations other than the original data; etc.