A researcher is comparing the differences between a stateless firewall and a proxy firewall. Which two additional layers of the OSI model are inspected by a proxy firewall? (Choose two.)
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Last Updated: Jul 11, 2022
IT Exam Items Repository › Category: CCNA Security › A researcher is comparing the differences between a stateless firewall and a proxy firewall. Which two additional layers of the OSI model are inspected by a proxy firewall? (Choose two.)
A researcher is comparing the differences between a stateless firewall and a proxy firewall. Which two additional layers of the OSI model are inspected by a proxy firewall? (Choose two.)
- Layer 3
- Layer 4
- Layer 5
- Layer 6
- Layer 7
Explanation: Packet filtering firewalls are usually part of a router firewall, which permits or denies traffic based on Layer 3 and Layer 4 information.
An application gateway firewall (proxy firewall), as shown in the figure, filters information at Layers 3, 4, 5, and 7 of the OSI reference model.
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