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Zorluk: ZorVirtualization Fundamentals

An organization is deploying a database cluster on a bare-metal Type 1 hypervisor architecture. A network engineer needs to determine how frame forwarding occurs between two virtual machines (VM-A and VM-B) located on the same physical host and assigned to the same VLAN. Which mechanism correctly describes how traffic is handled between these two virtual machines?

  1. The internal virtual switch (vSwitch) inside the hypervisor performs Layer 2 forwarding between vNICs without sending frames onto the physical network interface card (pNIC).Cevap
  2. B
    The host operating system kernel intercepts the Ethernet frames and uses host-level software bridging drivers to process and redirect the traffic to the destination guest OS.
  3. C
    The frames must exit the physical NIC and be switched by an external top-of-rack physical switch back to the host interface to enforce VLAN segmentation.
  4. D
    The Virtual Machine Network Interface Card (vNIC) of the sending VM acts as a Layer 3 gateway, rerouting traffic internally through guest OS loopback adapters.

Cevap

The internal virtual switch (vSwitch) inside the hypervisor performs Layer 2 forwarding between vNICs without sending frames onto the physical network interface card (pNIC).
In a Type 1 (bare-metal) hypervisor, a virtual switch (vSwitch) runs directly inside the hypervisor software layer. It maintains virtual ports connected to each virtual machine's vNIC. When two VMs residing on the same host and VLAN communicate, the vSwitch performs Layer 2 MAC address lookup and switches frames entirely in RAM, bypassing the physical NIC and external physical switches.

Adım Adım Çözüm

1
Analyze the hypervisor architecture and VM placement
Identify that the environment uses a Type 1 bare-metal hypervisor hosting both virtual machines on the same physical host and VLAN.
Understanding hypervisor architecture determines how traffic flows between virtualized network components.
2
Evaluate the operational role of the virtual switch (vSwitch)
Recognize that the internal vSwitch maintains a MAC address table connecting the vNICs of VM-A and VM-B.
Because both VMs are attached to the same vSwitch on the same VLAN, the hypervisor can switch traffic internally in system memory.
3
Determine physical network interface involvement
Confirm that traffic remains within the hypervisor software and does not traverse the physical NIC (pNIC).
Physical network interfaces and physical switches are only engaged when sending frames to external hosts or across different physical hypervisors.

Anahtar Kavram

Virtual Switch (vSwitch) operation and intra-host Layer 2 frame forwarding in Type 1 hypervisor architectures
Tahmini Süre:1m 30s
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Virtualization Fundamentals

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