Which two networking devices operate at Layer 1 of the OSI model? (Choose two.)

Correct Answer: AE 🗳️
It defines the electrical and physical specifications of the data connection. It defines the relationship between a device and a physical transmission medium (e.g. a copper or fiber optical cable). This includes the layout of pins, voltages, line impedance, cable specifications, signal timing, hubs, repeaters, network adapters, host bus adapters (HBA used in storage area networks) and more." http://en.wikipedia.org/wiki/OSI_model

Which two networking devices forward data based on destination MAC address? (Choose two.)

Correct Answer: BC 🗳️
http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/white_paper_c11- 465436.html

Which two network topologies are the most popular in switching? (Choose two.)

Correct Answer: CD 🗳️
http://en.wikipedia.org/wiki/Network_topology

Which device would you select to partition a network into VLANs?

Correct Answer: C 🗳️