2. Hash table, what is it? Is it the key? A hash value is a string of characters that represent encrypted data. In short, it is the protected data.

3. What does it mean, SSL, and what is it? SSL stands for Secure Sockets Layer. SSL is a type of public key encryption.

4. What is a firewall for? A firewall monitors and filters out unwanted data packets from an Internet connection.

5. What is a proxy server? Proxy servers takes the place of users in the eye of web servers. They send requests from users to web servers, and retrieve web pages to send to the computers. This means the computers and the servers don't meet directly and don't have any idea that they do if they connect through a proxy server.

6. What is a botnet? It is an network of what we call zombie computers. A zombie computer is a computer that has transformed into automatic machines or bots that are under the control of a malicious operator.

7. What does DDoS mean, what is it? 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 large scale DDoS attack, global internet traffic is disturbed.

8. What does a computer virus do, how does it work? Usually, a computer virus is a malicious code that resides within a huge legitimate code. Although some viruses don’t harm computer, there have been ones that are notorious to have caused a lot of damage.

9. What is phishing? 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’s a cracker? What is 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.

FAQ – Most Important Computer Security Issues is a post from: Security Camera Review