Which features are provided by VLANs in a vSphere environment?

VLANs (Virtual Local Area Networks) play a crucial role in enhancing network management and performance within a vSphere environment. The primary feature provided by VLANs is the isolation of broadcast traffic. By creating separate VLANs, broadcast traffic from one VLAN does not interfere with traffic from another. This isolation helps to reduce broadcast storms and ensures that devices within a VLAN can communicate without unnecessary interference from traffic outside that VLAN, leading to better overall network efficiency and security.

In contrast, the other options pertain to different functionalities. Organizing storage resources is typically related to storage policies and management but not inherently to VLANs. Host profiles management involves standardizing and automating host configurations, which falls under the realm of vSphere features rather than VLAN functionality. Monitoring system performance usually involves tools and metrics outside of the scope of VLAN capabilities. Hence, the focus of VLANs primarily revolves around network traffic management through isolation.