A network administrator is configuring a firewall to restrict access to specific services on a server. The administrator wants to allow HTTP traffic while blocking FTP and SSH traffic. Which layers of the OSI model is/are primarily involved in this configuration?1.0 MarksLayer 3 (Network) and Layer 4 (Transport)Layer 6 (Presentation) and Layer 7 (Application)Layer 4 (Transport) and Layer 5 (Session)Layer 5 (Session) and Layer 6 (Presentation)Layer 2 (Data Link) and Layer 3 (Network)
Question
A network administrator is configuring a firewall to restrict access to specific services on a server. The administrator wants to allow HTTP traffic while blocking FTP and SSH traffic. Which layers of the OSI model is/are primarily involved in this configuration?1.0 MarksLayer 3 (Network) and Layer 4 (Transport)Layer 6 (Presentation) and Layer 7 (Application)Layer 4 (Transport) and Layer 5 (Session)Layer 5 (Session) and Layer 6 (Presentation)Layer 2 (Data Link) and Layer 3 (Network)
Solution
The layers of the OSI model that are primarily involved in this configuration are Layer 3 (Network) and Layer 4 (Transport).
Here's why:
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Layer 3 (Network): This layer is responsible for packet forwarding, including routing through different networks and IP addressing. Firewalls often operate at this layer to use IP addresses to direct network traffic.
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Layer 4 (Transport): This layer provides transparent transfer of data between systems and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer. This layer also includes the TCP and UDP traffic management. Firewalls can filter traffic based on whether it's TCP or UDP traffic, and based on the source and destination port numbers, which are
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