What is the function of a firewall in a computer network?

What is the function of a firewall in a computer network?

• A. To enhance internet speed
• B. To prevent unauthorized access
• C. To manage network traffic
• D. To save data backups

Answer: (B)

The function of a firewall in a computer network is primarily to prevent unauthorized access. Firewalls act as a barrier between trusted internal networks and untrusted external networks, such as the internet. They monitor and control incoming and outgoing network traffic based on predetermined security rules. By filtering the data packets that attempt to enter or leave the network, firewalls help to protect systems from unauthorized users, cyberattacks, and various types of malware. This security measure is crucial in maintaining the confidentiality and integrity of sensitive information within the network. While other options touch on network functions, they do not accurately describe the core purpose of a firewall. For instance, while managing network traffic can be a secondary function of firewalls, their main role is security-oriented. Additionally, firewalls do not enhance internet speed or save data backups, as these activities fall under different network management and data protection functions.

The function of a firewall in a computer network is primarily to prevent unauthorized access. Firewalls act as a barrier between trusted internal networks and untrusted external networks, such as the internet. They monitor and control incoming and outgoing network traffic based on predetermined security rules. By filtering the data packets that attempt to enter or leave the network, firewalls help to protect systems from unauthorized users, cyberattacks, and various types of malware. This security measure is crucial in maintaining the confidentiality and integrity of sensitive information within the network.

While other options touch on network functions, they do not accurately describe the core purpose of a firewall. For instance, while managing network traffic can be a secondary function of firewalls, their main role is security-oriented. Additionally, firewalls do not enhance internet speed or save data backups, as these activities fall under different network management and data protection functions.