Final answer:
A multilayer switch can operate at multiple OSI layers by combining the features of a switch and a router.
Step-by-step explanation:
The type of switch that can operate at multiple OSI layers is called a multilayer switch. A multilayer switch combines the features of a switch and a router, allowing it to forward traffic at both Layer 2 and Layer 3 of the OSI model.
At Layer 2, a multilayer switch functions as a traditional Ethernet switch, forwarding frames based on MAC addresses. At Layer 3, it can perform routing functions by examining IP addresses, making it capable of forwarding packets between different networks.
For example, if a multilayer switch receives a packet with a destination IP address that belongs to a different network, it will route the packet to the appropriate interface or VLAN.