Routers work in layers two, three, and four
layer 1 Physical (copper, fiber,...)
layer 2 Datalink (ethernet, token ring, ...)
2->3 providing address resolution (ARP) ie. media access control (MAC) to IP translation
layer 3 Network (IP,IPX,RIP,...)
3->4 providing routing
layer 4 Transport provides error handling in connectin oriented delivery and handles connectionless delivery Conneciton Oriented(TCP,SPX) Connectionless (UDP)
Data link Layer
transport
Data Link
tcp is the transport control protocol and ip is the internet protocol. tcp is concerned with guaranteed delivery of packets from source to destination, while ip is the protocol used to actually deliver packets. tcp is located at layer 4 of the osi model, or the transport layer. ip is located at layer 3 of the osi model, or the network layer. check out the video tutorials in the link below.
It's called the OSI Model... it has 7 layers. 1) Physical Layer 2) Data Link Layer 3) Network Layer 4) Transport Layer 5) Session Layer 6) Presentation Layer 7) Application Layer
Router works in Network Layer of OSI model
All layers - but to the greatest extent, the distinctive work done by the router - specifically, routing packets - corresponds to layer 3.
hub work at physical layer of osi model
PGP works at the Layer 6 - Presentation level.
physical layer Layer 1
Layer 4 : The Transport Layer
Layer 7: The Application Layer
Data Link Layer
application
Switches / Bridges and hubs work at data link layer, but there are layer three switches which operate at network layer. Dhruv
It depends on what kind of model it is, but in the model for computer 321O, it is on the layer between trhe keyboard and the behind screen, and there is a button with the osi code and there says everything.
Layer 2, Data Link.