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- 2071 Chaitra · 2 marks
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What is network security
Short answer
Network security defends network infrastructure and data against unauthorized access, misuse, and attacks. It ensures confidentiality, integrity, availability (CIA) through firewalls, encryption, authentication, and intrusion detection, and addresses threats like eavesdropping and denial of service.
What do you mean by network security?
Network security is the set of policies, practices and technologies used to protect a computer network and the data travelling on it from unauthorised access, misuse, modification, disruption or destruction. It protects the confidentiality, integrity and availability (CIA) of information and network resources.
It covers:
- Prevention: firewalls, encryption, authentication, access control, antivirus.
- Detection: intrusion detection systems, log monitoring.
- Response and recovery: incident handling, backup.
Threats include eavesdropping (sniffing), masquerading, replay, modification of messages, denial of service, viruses, worms and phishing.
Example: a bank encrypts online transactions with SSL/TLS, protects its LAN with a firewall and allows only authorised users to log in.
✓ Answer checked by Claude Opus 5.5 (high effort)
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