Firewalls are used to protect a computer on a network against:
Unauthorized attacks
Firewalls are designed to protect computers and networks from unauthorized attacks. They act as a barrier between a secure internal network and untrusted external networks such as the Internet, by monitoring and controlling incoming and outgoing network traffic based on predetermined security rules.
Let's analyze each option in detail:
- Internal attacks: While firewalls can block certain types of data traffic from internal sources, their primary function is not to prevent internal security breaches. Internal security is generally handled by other methods such as user authentication and access controls.
- Unauthorized attacks: This is the correct answer. Firewalls are mainly tasked with preventing unauthorized access or attacks from external sources. They do this by filtering data packets based on security protocols.
- Authorized attacks: This option is somewhat contradictory, as an attack cannot be authorized by definition. Firewalls would not prevent authorized data traffic considered legitimate.
- Fire attacks: This is not relevant to network security. Firewalls in computing are not related to physical fire prevention.
To conclude, firewalls are crucial for computer network security as they help in safeguarding against unauthorized intrusion and attacks by filtering and managing data traffic from and to the network.
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Code:
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Match List I with List II
LIST I
(Layers of OSI Model)
LIST II
(Function)
A.
Physical layer
I.
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B.
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II.
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C.
Session layer
III.
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D.
Application layer
IV.
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