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JN0-102 · Question #278

Which two statements accurately describe a broadcast domain? (Choose two.)

The correct answer is B. Broadcast domains consist of devices reachable by frames addressed to the Layer 2 broadcast address. D. Broadcast domains consist of devices that reside on the same VLAN.. This question asks for two accurate descriptions of a broadcast domain, which defines the scope of Layer 2 broadcasts.

Junos OS Fundamentals

Question

Which two statements accurately describe a broadcast domain? (Choose two.)

Options

  • ABroadcast domains require that the participating devices connect to common switches or hubs.
  • BBroadcast domains consist of devices reachable by frames addressed to the Layer 2 broadcast address.
  • CBroadcast domains require a gateway device such as a router.
  • DBroadcast domains consist of devices that reside on the same VLAN.

How the community answered

(32 responses)
  • A
    3% (1)
  • B
    91% (29)
  • C
    6% (2)

Why each option

This question asks for two accurate descriptions of a broadcast domain, which defines the scope of Layer 2 broadcasts.

ABroadcast domains require that the participating devices connect to common switches or hubs.

While devices within a broadcast domain often connect to common switches or hubs, this statement doesn't fully describe the nature of a broadcast domain, which is about the reachability of broadcast frames.

BBroadcast domains consist of devices reachable by frames addressed to the Layer 2 broadcast address.Correct

A broadcast domain is characterized by all devices that receive a broadcast frame when it is sent by any device within that domain, specifically frames addressed to the Layer 2 broadcast address (FF-FF-FF-FF-FF-FF).

CBroadcast domains require a gateway device such as a router.

A gateway device like a router terminates a broadcast domain, preventing broadcasts from being forwarded to other networks or broadcast domains, rather than being required for the domain's existence.

DBroadcast domains consist of devices that reside on the same VLAN.Correct

Devices residing on the same VLAN (Virtual Local Area Network) are part of the same broadcast domain, as a VLAN logically segments a physical network into multiple broadcast domains.

Concept tested: Broadcast domains and VLANs

Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/vlan.html

Topics

#broadcast domain#Layer 2 broadcast#VLANs

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