Which type of device can be replaced by the use of subinterfaces for VLAN routing?
Click on the arrows to vote for the correct answerA. B. C. D.
The correct answer is D. router.
Subinterfaces are virtual interfaces that can be created on a router's physical interface. These subinterfaces can be configured to correspond to different VLANs, allowing the router to perform inter-VLAN routing.
In traditional network designs, inter-VLAN routing is typically performed by a layer 3 switch or a router. However, with the use of subinterfaces, a router can perform the same functions as a layer 3 switch, making it unnecessary to have a layer 3 switch in the network.
A layer 2 bridge is a device that connects two different physical networks and forwards packets between them. It operates at the data link layer (layer 2) of the OSI model and does not have the capability to perform inter-VLAN routing.
A layer 2 switch is a network switch that operates at the data link layer (layer 2) of the OSI model. It can connect multiple devices together and forward frames between them based on MAC addresses. While some layer 2 switches may have limited support for VLANs, they do not have the capability to perform inter-VLAN routing.
A layer 3 switch, also known as a multilayer switch, is a network switch that operates at both the data link layer (layer 2) and the network layer (layer 3) of the OSI model. It can perform inter-VLAN routing and can also switch frames between devices based on MAC addresses.
In summary, while both layer 3 switches and routers can perform inter-VLAN routing, the use of subinterfaces on a router can replace the need for a layer 3 switch in the network.