Why do these help

locking the door: helps to prevent unauthorized access.
locking the keyboard: activate the screensaver or lock the system.
locking the workstation: is to prevent theft of the whole machine.
shutting down the workstation: shutting it down will require a log in therefore its safer.

threats to my computer

Unauthorized Access : This is access to connect to or use a system without permission of the owner. This is also called hacking.

Internet & Email : This can be a threat because attachments with viruses can be sent to your Email. You should not open an attachment that you do not know who it's by. If you are on a website you can download a virus or it can download without the user knowing.

Viruses, Trojans & Spyware : These can harm your computer and are usually installed onto the computer without the uses knowing, these are used to get information from the users computer.

Power Failure : This can be a threat because if you are in the middle of doing anything on your computer and there is a power failure all of your saved work will be lost. This can corrupt your files.

Natural Disaster : This is a threat because it can destroy your computer which means all of your files and data will be lost. you need to keep your files in a physically safe position possibly in a high place.

Data Corruption : This is when the data is damaged and the computer can no longer read it. If this happens the computer will not be able to turn on.

Peer to Peer Access : Where a group of computers are connected to one network. this can be a threat because if one of the computers gets a virus the whole system will not work.

Threats to my computer

1: unauthorised access is pretty much hacking people will do this to access personal accounts for example money accounts, passwords for facebook.
2: Internet & Email:  to prevent this is to not open any attachments in email that you don't no who they are sent from.
3.viruses,trojans, and spy wear is when you have a unauthorized access to your files use spy-wear programs
4.power failure can lead to loss off unsaved work and for a back door can be created and access your files and data corruption 
5.a natural disaster can lead to power failure what can lead to unauthorized access to your files
6.data corruption can lead to damaged files and programs which could weaken your computer
7.is when a group of computers can all access the same hard drive and if one computer gets infected all the other computers will get infected  

2780 test

i got 14/23 the 3 things i need to revise are:

• the differences of ram and rom.
• The table.
• The in disk drive.