What is the purpose of a firewall in network security?
A firewall acts as a barrier between a trusted internal network and untrusted external networks, filtering traffic based on predefined security rules. It helps prevent unauthorized access and protects systems from malicious attacks.
Which of the following is a common tool used for penetration testing?
All three tools—Wireshark, Nmap, and Kali Linux—are commonly used in penetration testing. Wireshark is used for packet analysis, Nmap for network discovery and vulnerability scanning, and Kali Linux provides a suite of security tools for ethical hacking.
Which attack type involves sending a large number of requests to overwhelm a server and make it unavailable to legitimate users?
A Denial of Service (DoS) attack aims to overload a server or network resource with excessive requests, causing it to crash or become unavailable to legitimate users.
What is the purpose of encryption in cybersecurity?
Encryption is used to protect data confidentiality by converting it into an unreadable format during transmission. Only authorized parties with the decryption key can read the original data.
What is an example of social engineering in cybersecurity?
Social engineering involves manipulating people into revealing confidential information, such as passwords or security details, often through phishing emails or deceptive phone calls.