Feb 4, 2010
Question 2
People interact directly with computer in many fields in our daily life. ICT helps people in managing several sectors. But we have threat to computer such as viruses and natural disasters.
Questions :
- Name four main sectors that use ICT in their management
- Education sector : E-learning is used in many schools today. Teachers and students also can use a lot of information that are searched through the Internet that can be used in any subjects
- Health sector : Telemedicine is widely used in hospitals and clinics to transfer medical informations through Internet and telephones.
- Banking and business sectors : The use of ICT in banking is involve online transactions and online payments to save time and so do energy.
- Government sector : Using ICT for public sector to inform the people about taxes, parties and the people also can pay the taxes through this e-government.
- State two differences between worms and viruses
What Is a Virus?
A computer virus attaches itself to a program or file enabling it to spread from one computer to another, leaving infections as it travels. Like a human virus, a computer virus can range in severity: some may cause 1. only mildly annoying effects while others can damage your hardware, software or files.
Almost all viruses are attached to an executable file, which means the virus may exist on your computer but it actually cannot infect your computer unless you run or open the malicious program. It is important to note that 2. a virus cannot be spread without a human action, (such as running an infected program) to keep it going.
3. People continue the spread of a computer virus, mostly unknowingly, by sharing infecting files or sending e-mails with viruses as attachments in the e-mail.
What Is a Worm?
A worm is similar to a virus by design and is considered to be a sub-class of a virus. Worms spread from computer to computer, but 1. unlike a virus, it has the capability to travel without any human action. A worm takes advantage of file or information transport features on your system, which is what allows it to travel unaided.
The biggest danger with a worm is its capability to replicate itself on your system, so rather than your computer sending out a single worm, it could send out hundreds or thousands of copies of itself, creating a huge devastating effect. One example 2. would be for a worm to send a copy of itself to everyone listed in your e-mail address book. Then, the worm replicates and sends itself out to everyone listed in each of the receiver's address book, and the manifest continues on down the line.
Due to the copying nature of a worm and its capability to travel across networks the end result in most cases is that 3. the worm consumes too much system memory (or network bandwidth), causing Web servers, network servers and individual computers to stop responding. In recent worm attacks such as the much-talked-about Blaster Worm, the worm has been designed to tunnel into your system and allow malicious users to control your computer remotely.
- There are six types of security measures that can be used to protect our computer. Explain what is :
- Cryptography : Cryptography is a form of secret codes which is NOT known by anyone except for who invented it and to whom it refers to. This security measure is for protecting secret information and overcome computers and information being stole.
- Firewall : A firewall is a part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. It is a device or set of devices configured to permit, deny, encrypt, decrypt, or proxy all (in and out) computer traffic between different security domains based upon a set of rules and other criteria.
by ismasyakila ended @ 10:09 AM
