FUNDAMENTALS OF COMPUTER

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COMPUTER THREATS SECURITY

WHAT IS A FIREWALL IN NETWORK SECURITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The firewall has as a component the filters (address blocking), proxy (application blocking), bastion host (equipment used for external access, isolated from the internal network) and demilitarized zones (isolation zones between the external and internal network).
A
RIGHT
B
WRONG
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Explanation: An application gateway firewall, also called a proxy firewall, filters information at Layers 3, 4, 5, and 7 of the OSI model. It uses a proxy server to connect to remote servers on behalf of clients.

Detailed explanation-2: -Proxy firewalls, also known as application-level firewalls, filter network traffic at the application layer of the OSI network model. As an intermediary between two systems, proxy firewalls monitor traffic at the application layer (protocols at this layer include HTTP and FTP).

Detailed explanation-3: -Software-based firewalls provide individual devices significant protection against viruses and other malicious content. They can discern different programs running on the host, while filtering inbound and outbound traffic.

Detailed explanation-4: -The packet filtering firewall filters IP packets based on source and destination IP address, and source and destination port. The packet filter may lack logging facilities, which would make it impractical for an organization that has compliance and reporting requirements to which they must adhere.

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