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200-101 · Question #170

What are three valid reasons to assign ports to VLANs on a switch? (Choose three.)

The correct answer is B. to isolate broadcast traffic E. to logically group hosts according to function F. to increase network security. VLANs are assigned on switches primarily to segment broadcast domains, logically group hosts by function, and improve security by isolating traffic between groups.

Operate a Medium-Sized Switched Network

Question

What are three valid reasons to assign ports to VLANs on a switch? (Choose three.)

Exhibits

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Options

  • Ato make VTP easier to implement
  • Bto isolate broadcast traffic
  • Cto increase the size of the collision domain
  • Dto allow more devices to connect to the network
  • Eto logically group hosts according to function
  • Fto increase network security

How the community answered

(23 responses)
  • B
    91% (21)
  • C
    4% (1)
  • D
    4% (1)

Why each option

VLANs are assigned on switches primarily to segment broadcast domains, logically group hosts by function, and improve security by isolating traffic between groups.

Ato make VTP easier to implement

VTP propagates VLAN configuration between switches across trunk links, but assigning individual ports to VLANs does not simplify or affect VTP implementation - the two operations are independent.

Bto isolate broadcast trafficCorrect

Each VLAN forms a separate broadcast domain, so broadcast traffic generated within one VLAN is not forwarded to other VLANs, reducing unnecessary traffic and improving overall network performance.

Cto increase the size of the collision domain

Switches already eliminate collision domains on a per-port basis at Layer 2; VLANs further segment broadcast domains but have no bearing on collision domain size.

Dto allow more devices to connect to the network

VLANs are a logical segmentation technology and do not provision additional physical ports or increase the number of devices that can physically attach to the switch.

Eto logically group hosts according to functionCorrect

VLANs allow administrators to group users or devices by department, role, or function regardless of their physical switch port location, enabling flexible and logical network organization.

Fto increase network securityCorrect

By isolating groups of users into separate VLANs, administrators can enforce access control policies that prevent unauthorized users in one VLAN from accessing resources or traffic in another VLAN, strengthening network security.

Concept tested: VLAN purpose - broadcast isolation, logical grouping, security

Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-12/configuration_guide/vlan/b_1612_vlan_9300_cg/configuring_vlans.html

Topics

#VLAN#broadcast domain#network segmentation#VLAN security

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