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SK0-004 · Question #837

Which of the following is a reason for setting up a VLAN?

The correct answer is D. It creates a logical separation of a physical network. A VLAN is used to create logical network segments on a physical network, isolating broadcast domains and improving security and traffic management without requiring additional physical hardware.

Server administration

Question

Which of the following is a reason for setting up a VLAN?

Options

  • AIt is required for 802.1X security.
  • BIt connects virtual network cards to a hypervisor.
  • CIt is required for SSL/TLS security.
  • DIt creates a logical separation of a physical network.

How the community answered

(34 responses)
  • A
    3% (1)
  • B
    6% (2)
  • C
    3% (1)
  • D
    88% (30)

Why each option

A VLAN is used to create logical network segments on a physical network, isolating broadcast domains and improving security and traffic management without requiring additional physical hardware.

AIt is required for 802.1X security.

802.1X is a port-based network access control protocol used for authentication; VLANs are not required for 802.1X to function, though dynamic VLAN assignment is sometimes used alongside 802.1X after a successful authentication.

BIt connects virtual network cards to a hypervisor.

Connecting virtual network cards to a hypervisor describes the function of a virtual switch (vSwitch) within a hypervisor environment, which is a virtualization concept distinct from a VLAN on a physical switched network.

CIt is required for SSL/TLS security.

SSL/TLS is a transport-layer cryptographic protocol that secures data in transit and operates independently of VLANs at a completely different layer of the OSI model.

DIt creates a logical separation of a physical network.Correct

A VLAN (Virtual LAN) uses IEEE 802.1Q tagging at the switch level to partition a physical network into multiple logical broadcast domains, allowing devices to be grouped by function, department, or security policy regardless of their physical location - this logical separation is the primary purpose for deploying VLANs.

Concept tested: VLAN purpose and logical network segmentation

Source: https://www.cisco.com/c/en/us/support/docs/lan-switching/8021q/17056-741-4.html

Topics

#VLAN#network segmentation#logical network separation

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