What role does a firewall play in computer networks?
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Answer: C. Protect against unauthorized access and threats
Explanation
A network firewall acts as a security barrier protecting computers against unauthorized access. Firewalls inspect incoming and outgoing network traffic based on strict security rule sets. The correct option correctly defines the primary protective role of firewalls in networks. Firewalls operate at network perimeters to block malicious data packets from entering systems. Packet filtering algorithms examine source and destination IP addresses during connection attempts. Both hardware appliances and software applications serve as effective perimeter firewalls.
Home routers include built in hardware firewalls to protect connected domestic devices. Corporate networks deploy advanced firewalls to prevent devastating corporate data breaches. Cybersecurity best practices require enabling personal software firewalls on all laptops. Monitoring website traffic describes web analytics rather than active network security defense. Blocking unwanted email is handled by spam filters rather than core network firewalls. Firewalls protect data security rather than artificially increasing underlying internet connection speeds.
- Subject
- Computer Science
- Category
- Computer Science
- Topic
- —
- Difficulty
- medium
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