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300-610 · Question #13

Which statement accurately describes a disjoint Layer 2 network topology in Cisco UCS infrastructure?

The correct answer is A. A vNIC can communicate with only one Layer 2 domain.. In a Cisco UCS disjoint Layer 2 network topology, each virtual Network Interface Card (vNIC) is constrained to communicate within only one specific Layer 2 domain. This configuration ensures strict separation of network traffic, preventing a single server interface from bridging

Compute Design

Question

Which statement accurately describes a disjoint Layer 2 network topology in Cisco UCS infrastructure?

Options

  • AA vNIC can communicate with only one Layer 2 domain.
  • BA VLAN can overlap across Layer 2 domains.
  • CA Cisco UCS Fabric Interconnect must be configured in switching mode.
  • DServers can use any virtual interface card.

How the community answered

(47 responses)
  • A
    89% (42)
  • B
    4% (2)
  • C
    4% (2)
  • D
    2% (1)

Why each option

In a Cisco UCS disjoint Layer 2 network topology, each virtual Network Interface Card (vNIC) is constrained to communicate within only one specific Layer 2 domain. This configuration ensures strict separation of network traffic, preventing a single server interface from bridging disparate Layer 2 networks.

AA vNIC can communicate with only one Layer 2 domain.Correct

In a Cisco UCS disjoint Layer 2 network topology, each vNIC is assigned to a single, isolated Layer 2 domain. This design ensures that a server's vNIC can only communicate within its designated Layer 2 network, maintaining strict separation between different network segments.

BA VLAN can overlap across Layer 2 domains.

In a disjoint Layer 2 topology, VLANs are typically not allowed to overlap across the separate Layer 2 domains; each domain should have its distinct set of VLANs to maintain isolation.

CA Cisco UCS Fabric Interconnect must be configured in switching mode.

A disjoint Layer 2 network topology can be implemented with Cisco UCS Fabric Interconnects operating in either end-host mode or switching mode, so switching mode is not a mandatory requirement.

DServers can use any virtual interface card.

While Cisco UCS servers use virtual interface cards (VICs), this statement is too generic and does not specifically describe a characteristic of a disjoint Layer 2 network topology.

Concept tested: Cisco UCS disjoint Layer 2 topology

Source: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/cli-reference/3-1/b_UCSM_CLI_Reference_Guide_3_1/b_UCSM_CLI_Reference_Guide_3_1_chapter_010.html

Topics

#Cisco UCS#Layer 2 topology#disjoint networks#vNIC

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