Tuesday, 24 January 2012

The Definition of a Firewall...


Firewall

A Firewall is a structure aimed to avoid unapproved access to or from a network that is private. The Internet is a volatile and unsafe environment when viewed from a computer-security perspective, therefore "firewall" is an excellent metaphor for network security. They can be implemented in both hardware and software. Firewalls are normally used to avoid un-approved internet users from accessing private networks that are connected to the Internet, for example intranets. The firewall examines all the incoming and outgoing data and it is able to block messages that do not meet the security conditions.

Below are types of firewall techniques:

Packet filtering

Is at the entry point of the network it protects, it looks at every single packet that is entering or leaving the network and it is the one that accepts or rejects based on the user’s outlined rules. This simply means that the firewall is the first program that receives and handles incoming network traffic, and it is the last to handle outgoing traffic.

Application gateway

It is a second type of firewall that provides security to specific applications like the FTP and Telnet servers. Effective but can enforce performance degradation.

Proxy server

Seizes each and every message that will be entering or leaving the network. The Proxy server then conceals the original network addresses.

Circuit Relay

Also known as the “Circuit Level Gateway”, it authorizes connections before permitting the data to be swapped. This means that the Firewall will not basically permit or prohibit packets, but it also regulates if the connection between both ends is valid according to configurable rules, it then allows traffic from other sources for a limited time to see if a connection is valid based on destination IP address and or port, user password, source IP address and or port etc. All sessions of data exchange are authorised and all traffic is prohibited, except when a session is opened. A circuit Level filtering controls for an advanced period of time than a Packet Filter, an advantage is that it is able to make up for the faults of the ultra-simple and utilisable UDP procedure where the source address is never validated as a utility of procedure. IP spoofing can be a bit difficult for it will be reduced. But the one of the disadvantages is that the Circuit Level functions at the Transport Layer and might need considerable alterations of the programming which usually provides transport functions.

Application Gateway

In this method the firewall goes more in its guideline of traffic. They are commonly regarded as being the most secure kind of firewall and they surely have the most sophisticated abilities. One of its disadvantages is that the setup is complicated, it needs thorough care in the different applications that use the gateway. Application gateway is usually applied on a detached computer on the network with a main purpose of providing proxy service.

All firewalls irrespective of type have one very significant thing in common which is they; receive, review and make choices of the incoming data before it get to the other parts of the system or network. That means they handle packets and they are strategically placed at the entry point of the system or network, the firewall is intended to protect.
   


What is a CPU?





The CPU (Central Processing Unit) is the portion of a computer system that carries out the information and instructions of a computer program to perform the basic tasks that have been assigned. The shape, design and implementation of CPUs have dramatically since the earliest examples. On larger machines CPUs require one or more printed circuit boards.

What is a template

What is a Template?

A template is a document for enforcing a standard layout, templates give you a structure to work from, within the template, it would already have a basic layout for you to use e.g. header and footer and within the header it would have the name and address of your company and logo. You should certainly set up a template for any document that is likely to be used more than once.



This is a copy of a template that I have designed


This is the evidence to show that I designed my letter head and saved it as a template. I had to design a logo for a company called scene, then I put the companies address up the top left hand corner with the logo on the top right hand corner, this was put in the header.

What is a Motherboard?


In personal computers, a motherboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system. The motherboard is sometimes alternatively known as the mainboard, system board, or, on Apple computers, the logic board It is also sometimes casually shortened to mobo.

A motherboard, like a backplane, provides the electrical connections by which the other components of the system communicate, but unlike a backplane, it also connects the central processing unit and hosts other subsystems and devices.

THE FIFA INDUSTRY


FIFA 12 is the nineteenth game in Electronic Arts' FIFA series of association football video games. It was developed by EA Canada, and published by Electronic Arts worldwide under the EA Sports label. David Rutter, the line producer for FIFA 12, promised "a revolutionary year for FIFA ... especially in the game play department. FIFA 12 has only just been released at is a massive success among the whole world and it was sold worldwide.  FIFA 12 is the most popular football game on the charts right now. Over the years FIFA has developed immensely in gaining customers and in the graphics it contains. Over THE years fifa has had many rivalries as Pro also known as Pes(Pro Evolution Soccer). The whole of the fifa industry is linked to every single console every made so for this each graphic would be different on separate consoles.

Monday, 23 January 2012

Why you should have your Computer up to date with updates and antivirus.

If you have a home PC you should always keep it in “good shape”. There nothing more disappointing when your own computer can’t run properly when you’re trying to internet browse or keeps “lagging up” constantly and crashing.
 You should update your computer whenever you have the chance or time. Or if you see any updates from your main programs telling you that you should update. Do it.

 Also make sure to have a good antivirus. Viruses are obviously common while you’re browsing through whatever websites you do. If your computer is not up to date then you are more at risk to get viruses. Keep your computer up to date and always safety check it through your antivirus.

Computer Systems

Computer Systems, well this is a very broad topic, one that could take months of learning to learn the basic in one individual section, but while we're at it, lets go. Computer systems would be things such as the hardware and the software. The difference between hardware and Software would be that, Hardware is the base of the computer. For example it's what you can touch, for example the base unit, desktop, mouse, keyboard, and monitor. Software is what you can't touch, such as; Microsoft Office, Explorer, Skype. The difference between the two is also the fact you can't download and install Hardware, whereas you can download and install software.
Also, in a computer system you have the basic components such as the Motherboard, Processor (CPU), and Hard Drive. The Motherboard is the heart of the computer. The RAM, The Controller Hub, The Processor, Sound Card & Network Card all depend on the Mother board.


By Tyler Prosper

What is a Template?

What is a template?

A template is a file that serves as a starting point for a new document. A template is pre- formatted in some way. An example would be a template formatted, in a word document as a business letter. The template would likely include, your name, business logo and address in the upper left corner.
A template is a tool for creating a standard layout and look across multiple pages. It provides extra controls depending on the type you use. A template is a document pattern or part of a document that you keep stored to make new documents. They can define the layout, fonts, margins and other features of a document. A template provides the framework that brings together common elements, modules and components as well as providing the cascading style sheet for your document.

Different Types of Computer Systems

 Different Types of computer systems

There are different types of computer systems such as desktops, laptops, notebooks, mainframes and palm top computers. These different types of computer systems fit the capability and suitability of the user preferences. For example the size, portability, storage device compatibility, speed of processor fits the needs and expectations of its computer user. It depends on the type of things a user may need or expect from their computer system in order to assign an appropriate computer system to them.

Laptops commonly have the same type of processor as a desktop including the same type of hard drive, main memory and ram. However it is much more expensive to get a laptop with the same specification as a desktop. The advantages between a laptop and desktop are that a laptop is portable as it can be carried around and operates off a rechargeable battery and commonly they all have wireless internet software so it’s so easily to connect to a WI-FI connect and surf the web. They also have a touchpad mouse which makes things a lot easier for user preferences and hardly any input devices are needed unlike a desktop. This has to run from a main power source and is normally kept in the same place and includes many inputs devices for it to operate.

Desktop computers all come with a monitor, keyboard, mouse, CD-RW, DVD-ROM, which are all mainly input devices. However computers systems such as laptops, net books and notebooks have these types of things integrated in the actual operating system itself where no input devices are needed in order for the system to work. On the other hand desktops have input devices in order to input data. Without these devices no data can be input and the usage of the computer system can be limited without a device such as a keyboard or a mouse to perform basic tasks.

Main frame computers have very powerful computer system which contains backing storage and large amounts of main memory capacity. They are normally used in business companies to ensure back up of any data and information. However they have input devices such a keyboard mouse and monitor but it does not consist of a processor.

Palmtop computers such as (PDAs) Personal Digital Assistants have a touch sensitive screen which allows you to touch the screen of the device with your finger or a stylus and operate the device. These devices are used to input notes, addresses, contacts, calendars’ etc. They normally have a small keyboard device within the touch sensitive screen which allows the user to input data into the PDA. The PDA contains software which, enable them to work with laptops and desktops to transfer and exchange data using a cable or Bluetooth devices.

IT Blog about Facebook

Facebook

Facebook is one of the world’s most used social networking website which has been launched since February 2004. It has more than 800 million active users; however every user must register themselves before using the site. A personal profile will then be created by the user about them and they can then start adding and interacting with other user’s profiles.

Face book was founded by Mark Zuckerberg which started off in Harvard University in the USA where it began to expand. By January 2009 Facebook was ranked as the most used social networking service by worldwide active monthly users.

Wednesday, 18 January 2012

What is a Proxy Server?


What is a proxy server?



A proxy server is a computer that works as a computer network service it allows clients to make connections to other network services but without going directly to them.  It is a computer that diverts requests between a client and a server.  There are quite a few uses of a proxy server, but the most common is to speed network traffic by caching pages or files that are requested often. By doing this the proxy server can deliver the request quickly, only polling the server when required. In this way, a proxy server not only speeds up network traffic, but also relieves server load.

 There are usually four different types of proxy servers:


·         Transparent Proxy
This kind of proxy server shows itself as a proxy server and makes the original IP address available and visible through the http headers.
·         Anonymous Proxy
This type of proxy server also shows itself as a proxy server, but it does not make the original IP address available. It is detectable, but it still provides a certain amount of privacy for most users.
·         Distorting Proxy
This type of proxy server identifies itself as a proxy server, but makes an incorrect original IP address available through the http headers.
·         High Anonymity Proxy
This type of proxy server does not identify itself as a proxy server at all and does not make itself available through the original IP address.



Monday, 16 January 2012

Adding Hyperlink To Our Post In Blogger

What is Hyperlink? Hyperlink is a pointer to another web page or a File, Hyperlink is always indicated by the colour blue and an underline.













However, a web design can form a hyperlink in a way he/she choose by using Cascade style sheet (CSS Technology)or just by using formatting tags in Html Programming Language.
How to use Hyperlink in your blog post? These are great ways to create to external website that you want to write about or that you want to send your readers to, Links to picture, Links to File, they really drive the world wide experience.
From the blogger dashboard, creating a new post




Title: Using Hyperlink
First and Foremost we can create hyperlink by using raw html code.           
What we are going to do is we  will edit Html.
<a> html tag to create hyperlink.    
<a> Hyperlink </a>, (you can learn about html code, so as to get use to the way of writing code.)
You can add your own hyperlink code in the html, You must let the hyperlink open and close in the hyperlink you want to create.
<a> is used to create hyperlink  and make sure it is bracket open and bracket close  around the word you want to be the Hyperlink, we need to have the href attribute to create the  link target, In this case we use www.kreativebrainz.com and it will appear like this
<a href="http://www.kreativebrainz.com"> Hyperlink </a> so when we change it to compose mode it will come in this form, as example.
If we come to the preview mode, It will come out like this text 
The First hyperlink we will create is by using Raw Html code. When we click on this text Hyperlink it directs us to the website after the href attribute.

2.The second way to add a hyperlink by using the link button in the post editor
Select the word you want to form the Hyperlink then click on the LINK botton, Click the Link botton then the java script application toolbar will come up and instruct you to enter the URL you are directing the post to, and you can copy and paste the URL the site you you want to direct it to. e. the smoking gun.com
Copying the URL to the Clipboad
Then the link will be able to take you to the URL, this really will make the web to expand.

This short video which has been took off youtube basically exaplains how to create a table on Microsoft Access.

What is a Computer ?

A computer is a programmable machine designed to automatically carry out anything it is able to do. The particular sequence of operations can be changed readily, so this means that if there is more than one problem on the computer it can solve it. An important class of computer operations on some computing platforms is the accepting of input from human operators and the output of results formatted for human consumption. The interface between the computer and the human operator is known as the user interface.

Conventionally a computer consists of some form of memory, at least one element that carries out arithmetic and logic operations, and a sequencing and control unit that can change the order of operations based on the information that is stored. Peripheral devices allow information to be entered from an external source, and allow the results of operations to be sent out.

A computer's processing unit executes series of instructions that make it read, manipulate and then store data. Conditional instructions change the sequence of instructions as a function of the current state of the machine or its environment.

A laptop is also a computer but is a machine which is very smaller and easy to carry around, it can also connect to the internet without any wires and absolutely near enough everything on which a normal sized computer does.

Thursday, 12 January 2012

Laptops


Laptops

Laptops are designed to be portable to be carried around and travelled with.  This however may mean that in terms of performance it lacks compared to the pc.  They include spare parts such as the trackball or the track pad acts as the stationary mouse new laptop models can already be attached with external mouse, screen, and keyboard.  It also has a power adapter to allow the user recharge the in-built battery as it gets weak and also has quite a few drives and ports for better functionality.
Laptops usually have the same processors as desktop computers and similar sized main memory and hard disk drive.








Internal Components

The inside of a laptop is made up of different components, each working together to run a program, load a web page or play a game.

·        Hard Drive: This is a disk that holds all your files and applications. 

·        Processor: This is the brain of the computer

·        Memory: When the CPU needs to access data quickly, the data is temporarily stored in fast access volatile memory, the more memory your laptop has, the faster it can run.

·        Graphics: There are two types of laptop graphics available they are integrated and dedicated.

Heat Sink and cooling Fan: A heat sink increases the surface area in contact with the cooling fluid surrounding it, such as the air. The cooling fan is any fan inside, or attached to, a computer case used for cooling purposes. The use of fans to cool a computer is an example of active cooling.





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