Network Infrastructure & Devices

Question 1

Forwards traffic between different subnets based on IP address. Uses packet data to determine next hop.

Answer 1

Layer 3 Device

e.g. Router (Standalone), Multilayer Switch (Combined function), Wireless Router

Question 2

Forwards traffic based on hardware (MAC) address. Uses link address inside data frames.

Answer 2

Layer 2 Device

e.g. Switch, Hub, Wireless Access Point/Bridge

Question 3

Forwards traffic based on IP address and Port Number

Answer 3

Layer 4 Device

e.g. Firewall, Proxy, Encrypted Tunnel (endpoint)