Cisco Certified Support Technician (CCST) NetworkingNetworking FundamentalsEasy
A network technician is configuring a virtualized server environment. They need to allow virtual machines (VMs) on the same physical host to communicate with each other and also with the external physical network. Which virtual component facilitates this communication?
- AVirtual Firewall
- BVirtual Network Interface Card (vNIC)
- CVirtual Switch (vSwitch)
- DVirtual Router
Show answer & explanationAnswer & explanation
Correct answer: C. Virtual Switch (vSwitch)
A Virtual Switch (vSwitch) operates similarly to a physical network switch, allowing VMs on the same host to communicate internally and forwarding traffic between VMs and the physical network adapter for external connectivity.
Why the other options are wrong
- A. A virtual firewall provides security by filtering traffic for VMs, but doesn't facilitate basic connectivity.
- B. A vNIC is the network adapter for an individual VM, connecting it to a vSwitch, but it doesn't provide the switching functionality itself.
- D. A virtual router routes traffic between different virtual networks or subnets, not within the same virtual segment.
Virtual Switch (vSwitch)
A virtual switch is a software-based network device within a hypervisor that enables virtual machines to communicate with each other and with external networks.
- Connects VMs on the same physical host.
- Connects VMs to the physical network via a physical NIC.
- Performs Layer 2 (switching) functions virtually.
Memory trick: vSwitch: Virtual Machines Share Connections.