Tuesday, 30 April 2013

p3 corrections


There are several security risks that could damage the computer or even leave you at risk. These are thing such as:
·         Viruses: Viruses are programs that are specifically designed to steal data from another computer or even corrupt it completely. Viruses are commonly hidden as downloaded files from the internet, or in attachments you are sent via email etc. If these files are downloaded the security of the computer is breached due to doing things such as shutting down anti-virus software and even stopping a computer from doing basic actions. If a virus makes its way on to a website it can spread to the computer of everyone that uses the site. So it is not only the computer hosting the website that is affected by this.
·         Hacking: this means to illegally gain access to someone else’s computer for any reason. The most common reason this is done is to steal or delete a specific piece of data but another reason this would be done is for the purpose of downloading viruses onto the computer. When hacking you have to re programming the system so it will perform functions that were not previously authorised by the actual owner of the computer.
·         Identity Theft: This means to steal another person's personal information over the internet. This is usually done by hacking or creating false website examples of this can be bank details, your address or phone number really anything you do not wish to be shared. Identity theft over the internet is very common. This is because many people enter their details into a form on the internet before checking if this is a secure and safe website.

Security Protection Mechanisms:

There are some ways you can prevent this from happening and protect your computer these are things such as firewalls, passwords etc.

·         Passwords:  The point of password strength defines how easy this password be to work out. Passwords that contain a combination of randomised numbers and both lower and upper case letters are the hardest ones to work out and will keep you the most secure this is due to their being a mixture of all 3.
·         Firewalls - A firewall is part of a network that is designed to stop anyone who does not have authorisation but is still trying to gain access. It will grant or deny network transmissions based on certain rules that are in place. There are two types of firewall these are software and hardware. The hardware firewalls can be included as part of a router. Whereas software firewalls are programs that are on the computer, an example of this is Windows Firewall. The use of a firewall is also to help prevent the spread of viruses, so if your computer is infected, there is less chance that the virus can be transferred to other computers.
·         SSL – This stands for the secure socket layer. This provides security for communications over the internet. SSL encrypts the data of network connections above the transport layer and at a lower sub-layer of its application layer using a keyed message authentication code for message integrity. Websites with SSL will have a certificate to show that they are secure websites; this will make people far more likely to use the website.




Thursday, 25 April 2013

M1 corrections blogs and online applications


M1
Cloud Computing:
 Hardware and software programs are delivered over a network and seen as a service, these are not stored on the user's computer instead they are stored on a network at a different single location. This means less storage space is used up on the user's computer; the use of this reduces the number of performance and also intensive actions the user's computer must undergo. The user has to log in to the service to gain access then they can easily be able to use the programs they need to use.

Web 2.0
Web 2.0 sites may allow users to interact with each other in a social media dialogue as makers of user generated content in a virtual conversation, in contrast to websites where people are limited to the passive viewing of content. Examples of Web 2.0 include social networking sites, blogs, wikis, video sharing sites, hosted services; web applications. Social networking sites, blogs, wikis, video sharing sites and web applications are all in the same category. Web 2.0 uses JavaScript this is to make it able to upload or download new data from a web server without having undergoing a full page reload. This allows users to be able to interact with the page by separating communications For example data requests going to the server and data going back to the page. A few examples of this is the Timeline on twitter, this will constantly continue to refresh itself even though the user does not refresh the another example is comments section on YouTube which will refresh whilst a user watches a video.

Web blogs

Web blogs are usually linked with social interaction in a virtual world between users this is usually done by the passing of information sent from different IP addresses along a server to then a different user who then receives the sent message. This allows users to interact with each other and pass messages along a server. The server will then be given a timer to refresh automatically which will then allow the page to update so the users can then see new comments that have been sent or a message that has been delivered to them all this refreshing of the page allows the information to pass.

Online applications

Online applications are now used and more successful due to the updating of modern technology such as smartphones and android markets. Online applications use cloud computing as this is not done from the user’s computer. Apps on phones are now very popular especially when it comes to iPhones or top of the range smartphones a number of apps become a huge success.  The apps are a document saved onto a server for example the app store this then can pass information to another users computer for example after you download from the app store it can be saved onto your computer.

Friday, 19 April 2013

P2 AND M1


P2
The download speed can vary and depends on many things these can be effected how fast others can use the internet depending on how big the download. If it is not a strong connection of broadband the download may slow down others who are connected to the same wifi and cause there devices to not work as fast.  The speed of the computer or device you have could depend on the performance of it and how enhanced it is. The more ram and the better processer speed means that the computer will be able to handle and process the information quicker therefore your browser speed will increase and the pages will load much quicker.  The cache memory will allow certain pages that you have previously visited multiple times before to load quicker and the computer to process information for example as I frequently use Google this will be a page that loads quicker than most others.
The web server capacity depends on what broadband company the computer is connected to, high download speed and amount of  information it can process such as virgins 100mb fibre optic cable allows the computer to process the information and load websites quicker for example Facebook or websites with a lot of display content that needs to be loaded.  On the other hand though if there is a slow broadband download speed this means that the downloading of information may be slow and restricts how fast this can be done. It may also affect other people connected to the broadband and slow down how fast their device can connect and process information. The server for this company needs to be of high quality as if one website has loads of hits such as beyonce tickets being sold if the servers cannot deal with high amount of hits in a small timeframe this will cause it to crash. Also the faster and stronger the server is it will allow you to use multiple applications at once which may end to be done in some circumstances such as fireworks etc. This then needs to be have enough to use bitmaps vectors and other applications.










M1
Cloud Computing:
 Hardware and software programs are delivered over a network and seen as a service, these are not stored on the user's computer instead they are stored on a network at a different single location. This means less storage space is used up on the user's computer; the use of this reduces the number of performance and also intensive actions the user's computer must undergo. The user has to log in to the service to gain access then they can easily be able to use the programs they need to use.

Web 2.0
Web 2.0 sites may allow users to interact with each other in a social media dialogue as makers of usergenerated content in a virtual conversation, in contrast to websites where people are limited to the passive viewing of content. Examples of Web 2.0 include social networking sites, blogs, wikis, video sharing sites, hosted services; web applications. Social networking sites, blogs, wikis, video sharing sites and web applications are all in the same category. Web 2.0 uses JavaScript this is to make it able to upload or download new data from a web server without having undergoing a full page reload. This allows users to be able to interact with the page by separating communications For example data requests going to the server and data going back to the page. A few examples of this is the Timeline on twitter, this will constantly continue to refresh itself even though the user does not refresh the another example is comments section on YouTube which will refresh whilst a user watches a video.

p1 internet