VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

How does the vSphere Distributed Switch affect network traffic for virtual machines?

1. It can isolate traffic from the management network.

2. It eliminates all network latency.

3. It restricts traffic only to local VMkernel ports.

4. It simplifies network management across ESXi hosts.

The correct answer is: It simplifies network management across ESXi hosts.

The vSphere Distributed Switch (VDS) significantly enhances network management across multiple ESXi hosts, which is why the choice indicating its ability to simplify management is the correct answer. By utilizing a VDS, network configuration and policies can be implemented at a centralized level instead of configuring them individually on each host. This centralized management leads to consistent networking policies, simplifies the process of adding new virtual machines (VMs), and ensures that networking settings are uniformly applied across the datacenter. Additionally, a VDS provides advanced features like network I/O control, port aggregation, and monitoring, which are particularly beneficial in larger environments where managing multiple standard switches would become increasingly complex. The other choices reflect aspects that do not capture the primary benefits of VDS. For example, while isolating traffic from the management network is possible with proper configurations, that isn't the main function or capability of a VDS. The claim of eliminating all network latency is misleading, as network latency can still occur depending on various factors, and VDS does not inherently eliminate it. Furthermore, restricting traffic solely to local VMkernel ports does not align with the primary purpose or advantages of a distributed switch; VDS supports broader traffic management across multiple hosts rather than limitations to local interfaces.