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Sunday, November 26, 2006
Tuesday, November 21, 2006
Assignment1
1.What is security?
In the computer industry, refers to techniques for ensuring that data stored in a computer cannot be read or compromised by any individuals without authorization. Most security measures involve data encryption and passwords. Data encryption is the translation of data into a form that is unintelligible without a deciphering mechanism. A password is a secret word or phrase that gives a user access to a particular program or system.
2.What is firewall?
FIREWALLis a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.
Example:SQL firewall, Outpost Firewall Pro
3.What is antivirus?
ANTIVIRUS software consists of computer programs that attempt to identify, thwart and eliminate computer viruses and other malicious software (malware).
Antivirus software typically uses two different techniques to accomplish this:
* Examining (scanning) files to look for known viruses matching definitions in a virus dictionary
* Identifying suspicious behavior from any computer program which might indicate infection. Such analysis may include data captures, port monitoring and other methods
Example: McAfee, Norton, PC-Cillin
In the computer industry, refers to techniques for ensuring that data stored in a computer cannot be read or compromised by any individuals without authorization. Most security measures involve data encryption and passwords. Data encryption is the translation of data into a form that is unintelligible without a deciphering mechanism. A password is a secret word or phrase that gives a user access to a particular program or system.
2.What is firewall?
FIREWALLis a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.
Example:SQL firewall, Outpost Firewall Pro
3.What is antivirus?
ANTIVIRUS software consists of computer programs that attempt to identify, thwart and eliminate computer viruses and other malicious software (malware).
Antivirus software typically uses two different techniques to accomplish this:
* Examining (scanning) files to look for known viruses matching definitions in a virus dictionary
* Identifying suspicious behavior from any computer program which might indicate infection. Such analysis may include data captures, port monitoring and other methods
Example: McAfee, Norton, PC-Cillin
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