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Zorluk: Çok zorNetwork Components Roles and Functions

An enterprise network architect is auditing a virtualized campus network deployment. A database workload runs inside a virtual machine (VM) hosted on a bare-metal (Type 1) hypervisor. The hypervisor's virtual switch (vSwitch) is connected via an 802.1Q trunk link to a physical Layer 2 access switch, which in turn connects to a Layer 3 switch serving as the default gateway. If the VM sends a Layer 2 ARP broadcast frame to locate its default gateway, which statement correctly describes how network components handle this broadcast frame?

  1. The Type 1 hypervisor's vSwitch forwards the broadcast frame across the trunk to the Layer 2 switch, which floods it out all active ports in the same VLAN, while the Layer 3 switch interface processes the frame but does not forward the broadcast beyond the subnet.Cevap
  2. B
    The Layer 2 access switch terminates the broadcast domain at its ingress port and converts the frame into a Layer 3 unicast packet before transmitting it to the core switch.
  3. C
    Because Type 1 hypervisors operate on top of an underlying host operating system, the host OS intercepts the ARP broadcast and encapsulates it into a IP tunnel prior to reaching the physical switch.
  4. D
    The Layer 2 access switch uses CDP neighbor TLV metadata to identify the hypervisor's vSwitch and re-routes the broadcast frame as a unicast frame straight to the default gateway.

Cevap

The Type 1 hypervisor's vSwitch forwards the broadcast frame across the trunk to the Layer 2 switch, which floods it out all active ports in the same VLAN, while the Layer 3 switch interface processes the frame but does not forward the broadcast beyond the subnet.
A Layer 2 broadcast frame (such as an ARP request) is flooded by both virtual switches (vSwitches inside a Type 1 hypervisor) and physical Layer 2 switches to all active ports within the assigned VLAN. The Layer 3 device processes the ARP request to reply with its MAC address, but boundaried Layer 3 interfaces strictly restrict broadcast frames from being forwarded outside their local subnet.

Adım Adım Çözüm

1
Analyze the role of the Type 1 hypervisor vSwitch
The Type 1 bare-metal hypervisor directly controls hardware resources. Its internal virtual switch operates as a standard Layer 2 switch, forwarding the VM's Layer 2 broadcast frame out the physical uplink trunk connected to the access switch.
Type 1 hypervisors do not require a host OS, and vSwitches maintain Layer 2 VLAN segregation and broadcast functionality.
2
Evaluate the forwarding behavior of the physical Layer 2 switch
The physical Layer 2 access switch receives the broadcast frame on the 802.1Q trunk and floods it to all other operational access and trunk ports belonging to that specific VLAN.
Switches separate collision domains per port but preserve broadcast domains per VLAN.
3
Determine the boundary behavior at the Layer 3 gateway switch
The Layer 3 switch receives the ARP request on its Switched Virtual Interface (SVI) or routed port for that VLAN, processes the ARP broadcast locally to send an ARP response, but does not forward the broadcast frame to any other IP interfaces/subnets.
Layer 3 boundaries (routed interfaces and SVIs) define the edge of a Layer 2 broadcast domain.

Anahtar Kavram

Collision vs Broadcast Domains across Physical and Virtual Components
Tahmini Süre:2m 0s
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Konular

Network Components Roles and Functions

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