FC0-U71 · Question #158
Which of the following network devices permits and restricts network traffic as its primary function?
The correct answer is D. Firewall. A firewall's primary function is to monitor and control incoming and outgoing network traffic based on predefined security rules to permit or restrict access.
Question
Which of the following network devices permits and restricts network traffic as its primary function?
Options
- ARouter
- BSwitch
- CAccess point
- DFirewall
How the community answered
(20 responses)- A5% (1)
- C5% (1)
- D90% (18)
Why each option
A firewall's primary function is to monitor and control incoming and outgoing network traffic based on predefined security rules to permit or restrict access.
A router's primary function is to forward data packets between different computer networks, determining the best path for traffic. While it can have basic filtering capabilities, it is not its primary security role.
A switch's primary function is to connect devices within a single local area network (LAN) and forward data frames to specific ports based on MAC addresses.
An access point's primary function is to allow wireless devices to connect to a wired network.
A firewall acts as a barrier between a trusted internal network and untrusted external networks (like the internet), inspecting network traffic and applying rules to allow or deny communication based on criteria such as source/destination IP, port numbers, and protocols. This is its core security function.
Concept tested: Network security devices - Firewall function
Source: https://learn.microsoft.com/en-us/windows/win32/winsock/firewalls-and-security
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