220-801 · Question #805
Which of the following BEST describes a hub?
The correct answer is D. Broadcasts data to all network devices. A hub is a Layer 1 device that forwards all incoming data to every port without any filtering or intelligence. Unlike switches, hubs have no concept of addressing.
Question
Options
- ADetermines the best route to transmit data
- BInspects traffic and accepts or declines transmission
- CBroadcasts data to specific network devices
- DBroadcasts data to all network devices
How the community answered
(34 responses)- A3% (1)
- B3% (1)
- C6% (2)
- D88% (30)
Why each option
A hub is a Layer 1 device that forwards all incoming data to every port without any filtering or intelligence. Unlike switches, hubs have no concept of addressing.
Determining the best route is the function of a router, which operates at Layer 3 using IP addresses.
Inspecting traffic and accepting or declining transmissions describes a firewall, not a hub.
Broadcasting to specific devices describes a switch, which uses MAC address tables to forward frames only to the intended destination port.
A hub operates at Layer 1 of the OSI model and uses a broadcast mechanism - every frame received on any port is retransmitted out all other ports regardless of destination. This is its defining characteristic and the reason hubs have been replaced by switches in modern networks.
Concept tested: Hub function and Layer 1 broadcast behavior
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/nic-teaming/nic-teaming
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