2.3 Trojans

The term Trojan comes from the Greek legend about the fall of the city of Troy. The story goes that, during the seige of the city by the Greeks, a huge, hollow wooden horse was left in front of the gates. The inhabitants thought that it was a peace offering from the Greek army and dragged it into the city. Unknown to them, it was being used to conceal Greek soldiers, who were thus able to use this Trojan horse to enter the city and open the gates for the rest of their army.

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2.2.1 What is the difference between a worm and a virus?

Unlike a virus, a worm does not infect files on a host computer. Instead it adds a file to the computer that is malicious code, and runs it ‘in the background’. A computer has many programs running in this way in order for its system to operate. For instance, when you create a document you can see the text editor, such as Microsoft Word, Notepad or Star Office, but in the background the spell checker or the printer program are working even though you do not see them on the screen.

W
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2.1.1 What do we mean by 'infect'?

A virus will attach itself in various ways to a file that already exists on a ‘host’ computer, and when that file is run, the virus activates as well. A computer virus works in a similar way to a biological virus.

Biological virus: an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants or bacteria.

Computer virus: an infectious program of small size
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2.1 What is a virus?

A virus is a piece of computer code – a program – that has been written to gain access to files or programs on your computer. The virus may enter your computer via floppy disk, by email or by your Internet connection. It will look at the files on your computer and infect some of them if it can.


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2.2 Fixed and adaptive protocols

The protocol described above for a simple naming service is an example of a fixed protocol. This is a protocol whose vocabulary is fixed: it is embedded in the client and server's code and data and does not change. An adaptive protocol is one where the protocol changes. A fixed protocol could change over a period of time because the functionality provided by a server changes. However, this change will be over months or years rather than over seconds.

There are some instances wher
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4.5 Vulnerability and rights

One of the assumptions that is made in order to justify social workers making such life-changing judgements is that some people are vulnerable and therefore need decisions made on their behalf. This assumption is not held by everyone and is often challenged by groups and individuals representing service users and by service users themselves.

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ES200 Final Project_Ramirez

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