A router must implement the Physical layer, the Link layer, and the Network layer
Router works in Network Layer of OSI model
a. Routers are more expensive than bridges. b. Routers operate at the first three-layers; bridges operates at the first two layers. Routers are not designed to provide direct filtering the way the bridges do. A router needs to search a routing table which is normally longer and more time consuming than a filtering table. c. A router needs to decapsulate and encapsulate the frame and change physical addresses in the frame because the physical addresses in the arriving frame define the previous node and the current router; they must be changed to the physical addresses of the current router and the next hop. A bridge does not change the physical addresses. Changing addresses, and other fields, in the frame means much unnecessary overhead.
what are the three layers of the forest
A device that allows information to traverse different networks. Generally these are Layer 3 devices and a router is a perfect example of an internetworking device. A (basic) switch is NOT an internetworking device because information cannot be sent to a different network.
Three Layers
The three layers that I could think of are User interface, Client side, and server side.
What are three features of router-on-a-stick, inter-VLAN routing? (Choose three.)
taka the three routers
The three layers of the moon are similar to the layers of the Earth. These layers are the crust, the mantle, and the core.
Which three parameters must be configured on a router in order to enable SSH? (Choose three.)
The three layers are the retina, sclera, and the choroid.
The three germ layers are the ectoderm, the mesoderm, and the endoderm.