Information Technology (IT)

What is IT?

IT is the term that associates with all technology that are made to create, store, exchange and use information in many forms. (Voice calls, Motion pictures, still images..etc)

Hardware

Peripherals

The Basics of Computers

A computer is literally a device that can perform calculations. Although all devices can perform calculations there are many different ones that vary in shapes and sizes from a PC, apple iPod to even a pocket calculator. There are 2 categories when it comes to computers, one is that some are general computing devices which can do many different tasks (PC, Apple Mac, Smartphone, Apple Ipad..etc) and there is single-purpose devices that do specific tasks (Calculator,digital watch, digital camera..etc) For computers they are used to play games, edit videos/photos, to listening music and they are everywhere! A modern day computer itself needs 3 components to successfully work and that is


  • Hardware
  • Operating System
  • Applications


Hardware is the physical parts of a computer that you can touch and hold while the operating system is what controls the hardware and enables you to tell what the computer to do. Applications are what allows for specialized tasks to be done on a computer such as typing a document or playing a game.

Inputs/Outputs

Maintaining Computers

Maintaining your computer is key to increase the life span of them and knowing the ways to clean your parts are crucial. First, when cleaning computers you have to discharge the static electricity that might be on you by touching a metal surface or wearing an anti static strap so you won't fry the parts as they are quite delicate. One of the best ways to Clean a computer is by using compressed air and blowing out the dust/debris out.

Upgrading Computers

Upgrading your computer is also crucial as you may need to switch worn out parts or replace old ones with new ones. One thing that should be upgraded is to the hardware. Upgrades should be made when there are problems such as maybe the computer ran out of space, is in poor performance, critical errors..etc. While doing this always make sure that your computer is compatible with this!


Another upgrade that should be made is the OS (operating system) as this increases your security and also patches problems in the previous OS. Doing this comes with many risks such as compatibility issues so you must check that your computer can handle the upgrade. After this upgrade external upgrades might be needed as you might want different ports or maybe more of them. Know that upgrading is made only to fix problems!

Wired Networking

Wired Networking is the linking of devices like computers (with wires) and there are two types of networks LAN (local area network and WAN (wired area network). LAN is a small network that usually only consists with one group or building while WAN covers a bigger network as is consists of 2 or more LAN networks. One very common WAN that millions of computers are connected to is the internet as it is just a huge network where information and data is shared among them. To set this up you need a NIC ( network interface card) and a (optional) Ethernet wire and a Hub. Basically you plug your Ethernet wire into the hub (usually router) and into the Ethernet port on the mother board so you can start sending and receiving information/data.

Wireless Networking

Wireless networking uses radio signals instead of physical means to communicate with one device and another. To have wireless networks you don't need really any parts as most modern day computers have wireless Ethernet or blue tooth pretty much built in but if you don't you can put in PCI or PCIe cards. Modern day computers have the plug and play feature which lets you do very little as the computer registers the you have the network piece installed so a click of a few buttons and you are on the network!


In wireless networks there are 2 "modes" which are ad hoc and infrastructure mode.

Ad hoc is basically is peer to peer mode where you can directly share printers or files with other ones. This is manly used for small and temporary networks.


Infrastructure mode is for large and non temporary networks and use one or more WAP (wireless application protocol ) which allows you to use the internet, telephone...etc.

Servers/Clients


There are 2 types of computers in a network which is servers and clients. Servers basically share things like files, folders and even printers while clients pretty much accesses those shared things. One thing great about networks are that a PC can be both server, client or even both!

Jobs/certificates

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Security

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