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350-401 · Question #255
350-401 Question #255: Real Exam Question with Answer & Explanation
The correct answer is D: Router. Routers operate at Layer 3 and inherently create separate broadcast domains for each connected network segment by not forwarding broadcast traffic between interfaces.
Submitted by yousef_jo· Mar 6, 2026
Question
What type of network device helps reduce the size of a broadcast domain?
Options
- AHub
- BSwitch
- CLoad balancer
- DRouter
Explanation
Routers operate at Layer 3 and inherently create separate broadcast domains for each connected network segment by not forwarding broadcast traffic between interfaces.
Common mistakes.
- A. A hub operates at Layer 1 and simply repeats all traffic, expanding a single collision domain and broadcast domain.
- B. A switch operates at Layer 2 and creates separate collision domains but forwards broadcast frames to all ports within the same VLAN, thus staying within a single broadcast domain per VLAN.
- C. A load balancer distributes network traffic across multiple servers and does not primarily segment broadcast domains.
Concept tested. Broadcast domain segmentation
Reference. https://www.cisco.com/c/en/us/products/switches/what-is-a-broadcast-domain.html
Topics
#Routers#Broadcast domains#Network segmentation
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