200-301 · Question #1465
How does a hub handle a frame traveling to a known destination MAC address differently than a switch?
The correct answer is A. The hub forwards the frame to all ports, and a switch forwards the frame to the known destination.. A hub broadcasts all incoming frames to every connected port, whereas a switch intelligently forwards frames only to the specific port associated with the destination MAC address.
Question
How does a hub handle a frame traveling to a known destination MAC address differently than a switch?
Options
- AThe hub forwards the frame to all ports, and a switch forwards the frame to the known destination.
- BThe hub forwards the frame to all ports in the FIB table, and a switch forwards the frame the
- CThe hub forwards the frame using the information in the MAC table, and a switch uses data in its
- DThe hub forwards the frame only to the port connected to the known MAC address, and a switch
How the community answered
(30 responses)- A90% (27)
- B7% (2)
- C3% (1)
Why each option
A hub broadcasts all incoming frames to every connected port, whereas a switch intelligently forwards frames only to the specific port associated with the destination MAC address.
A hub is a Layer 1 device that lacks intelligence regarding MAC addresses; it functions as a multi-port repeater, receiving a signal on one port and regenerating it to all other ports. A switch, operating at Layer 2, builds a MAC address table and, for known destinations, forwards the frame only out the port where the destination MAC address was last seen.
Hubs do not use a Forwarding Information Base (FIB) table, which is typically associated with Layer 3 routing, nor do they make forwarding decisions based on specific ports for known MACs.
Hubs do not use MAC address tables; this is a fundamental function of Layer 2 switches.
This statement is incorrect as it describes the opposite behavior; hubs broadcast to all ports, while switches forward to the specific known port.
Concept tested: Hub vs. Switch forwarding behavior
Source: https://learn.microsoft.com/en-us/training/modules/network-fundamentals/3-network-devices
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