CompTIA Network+ (N10-009)Network ImplementationEasy
A network administrator needs to segment a large corporate network into several smaller broadcast domains to improve performance and security. Which of the following technologies should the administrator implement?
- APort Mirroring
- BSTP
- CVLANs
- DLink Aggregation
Show answer & explanationAnswer & explanation
Correct answer: C. VLANs
VLANs (Virtual Local Area Networks) allow for the logical segmentation of a network into multiple broadcast domains, improving network performance by reducing broadcast traffic and enhancing security by isolating traffic.
Why the other options are wrong
- A. Port Mirroring (SPAN) copies network traffic from one port to another for monitoring and analysis, not for network segmentation.
- B. STP (Spanning Tree Protocol) prevents network loops in redundant topologies, it does not segment broadcast domains.
- D. Link Aggregation combines multiple physical links into a single logical link for increased bandwidth and redundancy, not segmentation into broadcast domains.
VLAN (Virtual Local Area Network)
A logical grouping of network devices that allows them to communicate as if they were on the same physical segment, regardless of their actual physical location, creating separate broadcast domains.
- Divides a single physical switch into multiple logical switches.
- Reduces broadcast traffic and improves security.
- Requires a Layer 3 device (router or Layer 3 switch) to route traffic between different VLANs.
Memory trick: Think of VLANs as virtual rooms in a house, each with its own conversations.