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How do packets and routers work together?
Routers are packet switches. A router is usually connected between networks to route packets between them. Each router knows about it’s sub-networks and which IP addresses they use. The router checks it’s routing table. If the network containing the IP address is found, the packet is sent to that network.
How does my router know where to send packets?
When a router receives a packet, the router checks its routing table to determine if the destination address is for a system on one of it’s attached networks or if the message must be forwarded through another router. It then sends the message to the next system in the path to the destination.
How do routers know where to send packets quizlet?
Routers add a directly connected route when an interface is configured with an IP address and is activated. Each of the router’s interfaces is connected to a different network segment. When a packet arrives at the router interface, the router examines the packet header to determine the destination network.
How does the router work in Layer 2?
The router is a broker that will simply forward a packet and aid and help in the communications process. At layer 2, it is an intermediate step, and that is why the MAC address is changed. But at layer 3, we are still talking about a packet being sent from this source to that destination.
What happens to packets as they travel through a router?
Longest prefix matching is the backbone algorithm in finding the next hop for a packet moving towards its destination. When a router sees the destination IP address, it might happen that in the CIDR notation, there are more than one networks where the packet can be forwarded to.
How does an IP router send a packet?
The packet that was on hold is released and sent using the intended destination’s IP address, the source IP address of the sender, the source MAC of the sender, and the destination MAC is the router’s MAC address.
How does a layer 3 IP routing process work?
This is a layer 3 view with IP addresses for both the hosts and the router itself. Remember, your design will probably come from the fact that you want to split the two segments for performance or security reasons or some other reasons and insert a router in the middle so that you can do the forwarding of packets to the right destinations.