router networking/roo't*/ A device which forwards packets between networks. The forwarding decision is based on network layer information and routing tables, often constructed by routing protocols.
The OSI layer that handles IP addresses is the Network layer, which is the third layer of the OSI model. This layer is responsible for routing packets across different networks and managing logical addressing, such as IP addresses, to ensure that data can be sent and received between devices on different networks. Additionally, it facilitates the selection of optimal paths for data transmission.
The layer responsible for routing packets to their destination is the Network layer, which is the third layer in the OSI model. It manages the delivery of packets across multiple networks by determining the best path for data to travel from the source to the destination. Protocols such as Internet Protocol (IP) operate at this layer, facilitating logical addressing and routing decisions.
The network layer or layer 3 is where you would expect to find routers or possibly layer 3 switches. The network layer is the point where different networks can converge. Routing tables held on layer 3 devices are the path out of the network. If you look at your ipconfig information with the /all switch you will see an address given for default gateway. This will point to the router that is aware of all other networks or sub networks you have access to. In the home this is usually the inside or private address of your DSL or cable modem. I understand some bridges operate at layer 3 as well. At layer 3 Ethernet frames are formed into packets in preparation for routing between networks or sub networks. Because the OSI layer is as implied open there are many examples of software and hardware that can operate at the network layer but router would be the best answer most of the time.
both are the common inter networking devices(functionally) but the layer 3 switch has the functionality of both switch and router, layer 3 switch are most commonly used in frame relay networks, layer 3 switches are also capable of inter vlan routing
The whole point of the network layer, and layer 3 devices, is to move packets between separate networks. Layer 2 devices on the other hand (switches), only move frames using only the data link layer between hosts in that same network. Without layer 3 devices (routers or gateways), there could be no communication between separate interconnected groups of computers.
layer 3
The Internet Protocol (IP) provides routing of data from the source to a destination by defining the packet structure and addressing scheme. It operates at the network layer, facilitating the movement of data between the data link layer and the transport layer. IP routes packets of data across interconnected networks, ensuring they reach their intended remote destinations. Its primary function is to handle addressing and routing, enabling effective communication across diverse network architectures.
routing between VLANs
In the OSI model, the Internet Protocol (IP) operates primarily at the Network layer, which is the third layer. This layer is responsible for routing packets of data across different networks and ensuring they reach their destination. The Network layer handles logical addressing, which is where IP addresses come into play, facilitating communication between devices on different networks. Additionally, protocols such as ICMP (Internet Control Message Protocol) also function at this layer to manage error handling and diagnostics.
If the message is going between two different networks then it must be routed (this includes different subnets of the same network as well). Routing is done by a router as the device.
Framing is done at the Data Link layer (Layer 2). Routing is done at the Network layer (Layer 3).