Which one among the following is the purpose of firewall?
- AOption (a)
Preventing unauthorised access to computer via the internet
- BOption (b)
Installation of software that can harm the computer
- COption (c)
Recording everything that is done on computer
- DOption (d)
Running checks to prevent virus attacks
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Correct answer
Preventing unauthorised access to computer via the internet
Why this answer is correct
The correct answer is Preventing unauthorised access to computer via the internet.
Key Points
- A firewall is a security system designed to protect computers and networks by preventing unauthorized access from external sources, such as hackers or malware.
- It acts as a barrier between a trusted internal network and untrusted external networks, such as the internet.
- Firewalls monitor and filter incoming and outgoing network traffic based on predefined security rules.
- They can be implemented as hardware devices, software applications, or a combination of both.
- By blocking suspicious or malicious traffic, firewalls help safeguard sensitive data and maintain system integrity.
Additional Information
- Types of Firewalls:
- Packet Filtering Firewalls: Analyze packets of data and allow or block them based on predefined rules.
- Stateful Inspection Firewalls: Monitor the state of active connections and make decisions based on context.
- Proxy Firewalls: Act as intermediaries between users and the internet, filtering requests and responses.
- Next-Generation Firewalls (NGFWs): Include additional features like intrusion prevention systems (IPS) and deep packet inspection.
- Key Terminologies:
- Intrusion Prevention System (IPS): A technology integrated into advanced firewalls to detect and block malicious activities.
- Network Address Translation (NAT): A feature used by firewalls to mask internal IP addresses from external networks.
- Demilitarized Zone (DMZ): A separate network segment created by firewalls to host public-facing services securely.
- Advantages of Firewalls:
- Prevents unauthorized access and safeguards against cyber threats.
- Monitors network traffic to detect and block malicious activities.
- Enhances security for home and enterprise networks.
- Limitations of Firewalls:
- Cannot protect against internal threats or attacks from trusted devices.
- Requires regular updates to stay effective against evolving threats.
- May cause slight network latency due to traffic monitoring.