Cisco
200-101 · Question #170
200-101 Question #170: Real Exam Question with Answer & Explanation
The correct answer is B: to isolate broadcast traffic. VLANs are assigned on switches primarily to segment broadcast domains, logically group hosts by function, and improve security by isolating traffic between groups.
Question
What are three valid reasons to assign ports to VLANs on a switch? (Choose three.)
Options
- Ato make VTP easier to implement
- Bto isolate broadcast traffic
- Cto increase the size of the collision domain
- Dto allow more devices to connect to the network
- Eto logically group hosts according to function
- Fto increase network security
Explanation
VLANs are assigned on switches primarily to segment broadcast domains, logically group hosts by function, and improve security by isolating traffic between groups.
Common mistakes.
- A. VTP propagates VLAN configuration between switches across trunk links, but assigning individual ports to VLANs does not simplify or affect VTP implementation - the two operations are independent.
- C. Switches already eliminate collision domains on a per-port basis at Layer 2; VLANs further segment broadcast domains but have no bearing on collision domain size.
- D. VLANs are a logical segmentation technology and do not provision additional physical ports or increase the number of devices that can physically attach to the switch.
Concept tested. VLAN purpose - broadcast isolation, logical grouping, security
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