Network layer device that to determine the optimal path along which network traffic should be forwarded is;

Router
170
Switch
43
Hub
78
Server
62
A router is a computer whose software and hardware are customized to move data between computer networks. They are responsible for making sure traffic between computers gets where it needs to go. They do this by choosing the shortest path between the computers using a complicated system of rules called Routing Protocols.
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reach: rather globalcomputernetwork