Which of the following is a defense measure for cyber attacks? A. Antivirus B. Firewalls C. Spoofing D. Anti spoofing

The defense measures for cyber attacks among the options provided are: A. Antivirus and B. Firewalls.

Here's why:

A. Antivirus - This is a program designed to detect and destroy computer viruses. It's a primary defense tool against malware (malicious software) threats including viruses, ransomware, and spyware.

B. Firewalls - A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. It's like a barrier between a trusted and an untrusted network.

C. Spoofing - This is not a defense measure but rather a type of cyber attack. In a spoofing attack, the intruder disguises as a user or device on the network to launch attacks against network hosts, steal data, or bypass access controls.

D. Anti-spoofing - While this term sounds like it could be a defense measure, it's not a standard term in cybersecurity. However, there are techniques and measures to prevent spoofing attacks, which could be considered "anti-spoofing" measures. These include packet filtering, cryptographic methods, and using specially designed software to identify and block spoofing attacks.