220-801 Question #373: Real Exam Question with Answer & Explanation

The correct answer is B: Firewall. A firewall is specifically designed to filter network traffic by inspecting and blocking or allowing packets based on defined rules, including specific ports (e.g., port 23 for Telnet) and protocols (e.g., UDP, TCP). A bridge connects network segments at Layer 2 but does not filt

Question

Which of the following devices would need to be configured to block specific ports and protocols from entering the network?

Options

ABridge
BFirewall
CPort replicator
DGateway

Explanation

A firewall is specifically designed to filter network traffic by inspecting and blocking or allowing packets based on defined rules, including specific ports (e.g., port 23 for Telnet) and protocols (e.g., UDP, TCP). A bridge connects network segments at Layer 2 but does not filter by port or protocol. A port replicator is a laptop docking accessory. A gateway connects different networks but does not inherently perform port/protocol filtering.

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