Are You Qualified As a Computer Owner? Check These Q&A First

September 17th, 2009 by admin

1. Can I pass information only to someone without it leaking to anybody else? Yes you can. You can use data encryption with the key known only by the receiver. Suppose a third party tapping the communication gets hold of the data, he will still could not make any sense out of it since it's meaningless unless it is decrypted.

2. What is a hash? Is it the password? A hash value is a string of characters that represent encrypted data. In short, it is the protected data.

3. What is SSL, what does it stand for? SSL stands for Secure Sockets Layer. SSL falls in the category of public key encryption.

4. How does a firewall work? A firewall monitors and filters out unwanted data packets from an Internet connection.

5. What does a proxy server do? Proxy servers stands between computers accessing the internet and the web servers. They relay requests from users to web servers and vice versa, without the servers realizing who is behind them. This creates a privacy for the users in that web servers have no idea that the real user interacting with them are behind the proxy server.

6. Botnet? What is it? It is an group of what we call zombie computers. A bot or zombie computer is a computer that has transformed into bots or automatic machines that are controlled by a third party somewhere.

7. DDos, what does it mean, how does it work? DDoS is Distributed Denial of Service. It is an attack that uses computers over the internet to send millions of requests to a server with the goal of overwhelming and crashing the server. In a major incident of DDoS attack, the whole internet traffic is disturbed.

8. A computer virus, what is it? Usually, a computer virus is a malicious code that resides within a larger computer legitimate code. Although some viruses don’t harm computer, there have been ones that are notorious to have caused catastrophes.

9. Phishing attack, what is it? Phishing is a method intended to fool ignorant people into giving away classified information like bank account numbers, usernames and passwords and credit card information, by faking a legitimate web site.

10. What does Cracker mean? What’s a Black Hat? We call hackers infiltrating secured systems to cause rogue things acquire certain informations as crackers. A black hat hacker is someone who actively attempts to break into systems or use computer viruses to steal information or achieve other purposes.

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