200-901 Network Fundamentals Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  Forward frames based on MAC addresses

  Why this is correct

  Forwarding frames by MAC address is the defining function of a Layer 2 switch, satisfying the stem's requirement for the primary role. It builds a MAC address table from source addresses and forwards each frame only out the port leading to the destination, rather than flooding every port as a hub does.

• ✗

  Amplify wireless signals

  Why it's wrong here

  A switch forwards frames between devices on a LAN using MAC addresses; it does not radiate or boost radio frequency signals. Amplifying wireless signals is tempting because coverage extension is a real networking need, but that is the function of a wireless access point or range extender.

• ✗

  Forward packets based on IP addresses

  Why it's wrong here

  Forwarding on IP addresses is layer-3 routing, performed by routers; a switch forwards frames using destination MAC addresses within a broadcast domain. It is tempting because multilayer switches can route, but the question asks the primary function of a switch, which is layer-2 frame forwarding.

• ✗

  Convert data to electrical signals

  Why it's wrong here

  A switch forwards frames between ports using MAC addresses; converting data to electrical signals is the transceiver's or NIC's job at the physical layer. It is tempting because switches do regenerate signals on each port, but that encoding function belongs to layer-1 hardware, not the switch's forwarding role.