Firewalls can't protect very well against things like viruses or malicious software (malware). There are too many ways of encoding binary files for transfer over networks, and too many different architectures and viruses to try to search for them all. In other words, a firewall cannot replace security-consciousness on the part of your users. In general, a firewall cannot protect against a data-driven attack--attacks in which something is mailed or copied to an internal host where it is then executed.

Alternate Answer:
Properly configured firewalls can limit the propagation of worms - a form of malware.  Typically, firewalls are edge or parameter devices (separates network zones) and most viruses and malware targets end points (user workstations and servers).

Applications software for communications includes  e-mail program to transmit messages via a network ,FTP programs to upload  and download  files on the internet, web browser programs  to access and view web pages newsreader/message board  programs that allow online written discussion with other users chat room software to have realtime  exchange of messages or files  and video conferencing/telephone call software for meeting or conversation on the net work between  geographically separated people.

A web applications software that exist on the web site .is a third-party organizations that manages  and distributes software and services on the web.

The two categories of software are system software and application software .System  software consist of the programs that control or maintain the operations of the computer  and its devices.The two types of the systems software are the operating system, which coordinates activities among computer hardware devices, and utility programs,which perform maintenance type tasks usually related to a computer its devices  or its program. Application software  consists of programs that perform specific task for users.Populor application  software includes web browser,word processing software ,spreadsheet software database softwarea and presentation graphics software

Application software is available in a variety of forms. Packaged software is mass produced, copyrighted retail software that meets the needs of a variety of users. Custom software performs function specific to a business or industry. Companies may use programmers to develop tailor-made custom software. Shareware is copyrighted software that is distributed  free for trial period. Freeware is a copyrighted software provided at no cost to a user by an individual or company. public-domain software is free software that has been donated for public use and has no copyright restrictions.

Proficiency in basic word processing software and internet is needed in a call center job as call centers generally use computers and the internet to reach the clients. It's time to toot your horn. If you are proficient in MS Office, then say it. If you took a diploma course in Computer Srudies, by all means, tell them.