FUNDAMENTALS OF COMPUTER

APPLICATION SYSTEM SOFTWARE

SYSTEMS SOFTWARE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the purpose of a firewall(Utility systems software)?
A
For security-scramble data using a key to encrypt so it can’t be understood. To decrypt a key is needed to put it into its original form.
B
For security-prevents unwanted access to or from a private network or the internet. Messages can be blocked based on criteria e.g. website addresses.
C
For security-scans for and removes malicious files.
D
For security-to block and remove programs designed to get your personal information.
Explanation: 

Detailed explanation-1: -A firewall is software or firmware that prevents unauthorized access to a network. It inspects incoming and outgoing traffic using a set of rules to identify and block threats.

Detailed explanation-2: -A firewall monitors and filters incoming and outgoing network traffic based on security policy, allowing approved traffic in and denying all other traffic.

Detailed explanation-3: -Firewalls prevent unauthorized access to networks through software or firmware. By utilizing a set of rules, the firewall examines and blocks incoming and outgoing traffic.

Detailed explanation-4: -To start, a firewalled system analyzes network traffic based on rules. A firewall only welcomes those incoming connections that it has been configured to accept. It does this by allowing or blocking specific data packets-units of communication you send over digital networks-based on pre-established security rules.

Detailed explanation-5: -The firewall works by filtering the incoming network data by looking at IP address, Protocol, Destination, Domain names, Keywords, Port, etc. Based on this, either allows or denies permission. The network administrator determines and customises these rules.

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