Essay On Computer Programs

Essay on Computer Hardware and Software

1482 WordsFeb 25th, 20136 Pages

Identify hardware and software needed to secure your choice of networks against all electronic threats.
Networking hardware is hardware that is used to help work stations connect to a server. Although there are many different kinds of hardware like bridges, network cards the networking hardware that I have chosen to use in within my company’s network are routers, firewalls and switches. Using both routers and firewalls will help protect not only wireless networks but also those networks that use Ethernet cabling. I chose this hardware because I felt that it’s the best hardware to use when keeping my company’s network safe. The software that I have chosen to use is McAfee Anti-virus security software. This software along with the…show more content…

LAN’s are very useful when it comes to sharing printers and exchanging/sharing files between all the systems within the facility that share that one network. LAN’s can turn into WAN when they are connected to the internet and also other LAN networks. Local Area Networks are connected using the Ethernet cables, adapters, and hubs. WAN’s are known as Wide Area Networks. Wide Area Networks are different from LAN’s. In a LAN network connections are being made within that local area in which all systems share that same network. The internet is considered to be a Wide Area Network. It’s considered to be a WAN because it links to computers outside a local Area Network but all over the world. “The world's most popular WAN is the Internet. Whoever uses a pc that has internet connection has access to the WAN or its network and websites displayed over the network. WANs cover a much larger area such as states and other countries. They also connect to smaller networks such as LAN’s and MAN’s or known as metro area networks. WAN’s also come with a heftier price tag than LAN networks and often uses leased lines. Then you have the WLAN or Wireless Local Area Network which is the LAN connection without the use of cables or wires. This is what makes the LAN connection wireless. The WLAN have a low cost installation, mobility, and support for temporary arrangements. The key to WLAN

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Software Essay


A set of instructions that directs a computer's hardware to perform a task is called a program, or software program. Software comprises the entire set of programs, procedures, and routines associated with the operation of a computer system. The two main types of software are system software and application software.

System software controls a computer's internal functioning, chiefly through an operating system , and also controls such peripherals as monitors, printers, and storage devices. Utilities and compilers are also parts of system software.

Application software, by contrast, directs the computer to execute commands given by the user and may be said to include any program that processes data for a user. Application software thus includes word processors, spreadsheets, database management, inventory and payroll programs, and many other "applications." They can be of three main types:
1. Office Suites
2. Graphic Applications
3. Communication Applications


Operating System:

The operating system is a remarkably complex set of instructions that schedules the series of jobs (user applications) to be performed by the computer and allocates them to the various hardware systems of a computer, such as the central processing unit, main memory, and peripheral systems. It is the master program based on which all other program work. Popular operating systems are Microsoft Desk Operating System (MS-DOS), Microsoft Windows, Red Hat Linux, Apple Mackintosh, etc.

MS-DOS: Released in 1981, MS-DOS is a command-line operating system which requires the user to enter all commands from a command prompt. It performs two types of functions:
1. Automatic functions which read data, allocate memory units and control peripheral devices.
2. Command functions which are carried out as instructed by the user.

Microsoft Windows: Windows is a graphical command program, the third version of which was released in 1990, gained immense popularity. By 1993, Windows 3.0 and its subsequent versions were selling at a rate of one million copies per month, and nearly 90 percent of the world's PCs ran on a Microsoft operating system. In the same year Microsoft released Windows NT, a landmark program that tied disparate PCs together and offered improved reliability and network security. By 1996 Windows NT was hailed as the likely standard for PC networking. In 1995, the Microsoft released Windows 95, which fully integrated MS-DOS with Windows and also the revolutionary Internet Explorer. Windows 95 was followed by Windows 98 and Windows 2000. The latest version of Windows, Windows XP was released in November, 2001.

Linux: Linux, seen as the major threat to Microsoft's superiority in the software arena, was created by Linus Torvalds in 1991. Unlike Windows, Linux can be modified by anyone who knows programming to suit their purposes as its source code is available to users. It is also inexpensive when compared to Windows. Red...

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