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Difficulty: HardNetwork Components Roles and Functions

An enterprise infrastructure deployment utilizes a physical server running a bare-metal Type 1 hypervisor. Two virtual machines, VM1 and VM2, reside on this physical host and are attached to the same virtual switch (vSwitch) configured on VLAN 50. The host's physical Network Interface Card (pNIC) connects to an external physical Layer 2 switch port configured for VLAN 50. When VM1 transmits an Ethernet broadcast frame, which statement correctly describes the component roles and frame forwarding behavior across this environment?

  1. The internal vSwitch switches the broadcast frame directly to VM2 and forwards a copy out through the pNIC to the physical switch, while the bare-metal Type 1 hypervisor directly manages physical hardware resource allocation.Answer
  2. B
    The physical Layer 2 switch must receive the broadcast frame first via the pNIC, update its MAC address table, and then transmit the frame back down the same physical link to reach VM2.
  3. C
    The hosted Type 2 hypervisor relies on a underlying client operating system to pass the broadcast frame to the host's networking stack for forwarding between VM1 and VM2.
  4. D
    The physical Layer 2 switch inspects CDP/LLDP TLV information attached to the broadcast frame to terminate the broadcast domain at the pNIC interface boundary.

Answer

The internal vSwitch switches the broadcast frame directly to VM2 and forwards a copy out through the pNIC to the physical switch, while the bare-metal Type 1 hypervisor directly manages physical hardware resource allocation.
In a virtualized environment with a bare-metal Type 1 hypervisor, the embedded virtual switch (vSwitch) operates as a standard Layer 2 switch for connected virtual interfaces. When a VM sends a broadcast frame, the vSwitch floods the frame to all local virtual ports belonging to that VLAN (delivering it directly to VM2) and transmits a copy through the physical host NIC (pNIC) uplink to the external physical switch. The Type 1 hypervisor directly controls hardware resources without requiring an intermediate host operating system.

Step-by-Step Solution

1
Analyze the hypervisor architecture type and role.
A Type 1 hypervisor runs directly on the bare-metal host hardware (without a host OS) and manages hardware resources for virtual machines directly.
Understanding the hypervisor architecture establishes how hardware interactions and virtual networking components operate.
2
Determine the local frame forwarding behavior on the virtual switch (vSwitch).
The vSwitch acts as a software-based Layer 2 switch inside the hypervisor. When VM1 generates a broadcast frame on VLAN 50, the vSwitch floods it to all local ports in VLAN 50 (reaching VM2).
Local intra-host switching occurs within the hypervisor software without requiring packets to exit to the physical network first.
3
Determine the egress frame forwarding behavior to the physical network.
The vSwitch also forwards the broadcast frame out of the uplink interface (pNIC) to the external physical Layer 2 switch so that other physical devices in VLAN 50 receive the broadcast.
Broadcast domains extend across both virtual and connected physical switch ports configured on the same VLAN.

Key Concept

Virtual Switch (vSwitch) and Type 1 Hypervisor Operational Roles
Estimated Time:2m 0s
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Topics

Network Components Roles and Functions

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