Cisco Certified Network Associate (CCNA) Practice Exam

What is one advantage of implementing VLANs?

1. Establish broadcast domains in switched networks

2. Utilize packet filtering to enhance network performance

3. Provide a method for APIPA address allocation

4. Allow for dedicated bandwidth per user

The correct answer is: Establish broadcast domains in switched networks

Implementing VLANs (Virtual Local Area Networks) offers significant advantages by establishing separate broadcast domains within a switched network. Each VLAN acts as an independent logical subnet, which means that broadcast traffic from one VLAN does not reach devices on another VLAN. This segmentation helps to reduce congestion and improves overall network performance by limiting the spread of broadcast traffic. With VLANs, network administrators can allocate network resources more effectively, enforce security policies by isolating sensitive information, and logically group users and devices based on function or department instead of physical proximity. This flexibility ultimately leads to improved management of network performance and security. The other options, while relevant to networking, do not accurately represent the primary benefits of VLAN implementation. Utilizing packet filtering relates more closely to security mechanisms, APIPA addresses serve a specific purpose in automatic IP assignment, and dedicated bandwidth is not inherently a function of VLANs.