CompTIA Network+ (N10-008) — Question 531

A network engineer is upgrading an existing edge gateway. The company currently uses a router and needs to be able to filter on all OSI layers. Which of the following should the engineer use to upgrade the gateway?

Answer options

• A. NGFW
• B. Proxy
• C. Layer 3 switch
• D. Load balancer

Correct answer: A

Explanation

The correct answer is NGFW (Next-Generation Firewall) because it offers advanced filtering capabilities across all OSI layers, including application-level filtering. The other options, such as Proxy and Load balancer, do not provide comprehensive OSI layer filtering, while a Layer 3 switch primarily operates at the network layer, limiting its filtering capabilities.