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How does router choose route?
A primary function of a router is to determine the best path to use to send packets. To determine the best path, the router searches its routing table for a network address that matches the destination IP address of the packet.
Why do packets take different routes and how do they decide which route to use?
Each router examines and sends each IP packet individually — this is called packet switching. If the network changes, due to congestion or faults, routers can use an alternative interfaces to reach a destination. So packets may travel over different routes to reach the same destination.
Is the process of forwarding packets?
What is Packet Forwarding? Packet Forwarding is the process of a networking component accepting a packet and transmitting it to its destination. For example, a router receives packets from hosts on one attached network and forwards them to hosts on another attached network or to another router for further forwarding.
What is the difference between route and route?
In rfc-sense terms the difference between route and route is that route is (figuratively) one of multiple methods or approaches to doing something while route is (figuratively) one of multiple methods or approaches to doing something.
What sends packets to all nodes?
When a node on one network needs to send a message to a node on another network, this packet will be picked up by the router and passed on to the other network. Since routers transmit IP packets, and IP packets are all independent of one another, each packet can travel along a different route to its destination.
How does switch know where to send packet?
When a frame enters into the switchport, the switch checks the dynamic table in memory which stores Physical Port and MAC address pairs. Switch then knows which port to use to forward the frame. Remember: switch does not look into the IP packet and forwards frame as is based on destination MAC address.
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.
Do you forward packets to the destination network?
Don’t forward packets of which you know they will be a broadcast on the destination network. A host on 10.0.0.0/24 knows that 10.0.0.255/24 will usually be the network broadcast. It will set the destination Ethernet address to the address defined as broadcast, which is all FF.
How does a router select the best route?
Routers select best routes based on the following criteria: Longest prefix match: Routers select routes with the longest match to the destination address in the forwarded packet.
Can a router forward a network broadcast address?
Generally speaking routers will not forward incoming packets which have the network broadcast address as destination. You may want to add some precision or context to that statement. It is only true for routers that have an interface into that subnet and thus know that what the network broadcast address of that subnet happens to be.