Answer: Packets find a computer in a network by following routing tables and switches or routers forwarding them based on destination IP addresses.
Destination IP Address
Each packet contains a destination IP address, indicating where it needs to go within the network.
Routing Tables
Routers maintain routing tables that contain information about network destinations and associated next-hop addresses. When a packet arrives at a router, it examines the destination IP address and consults its routing table to determine the best path for forwarding the packet.
Forwarding Decisions
Based on the information in the routing table, the router forwards the packet to the next hop along the path to the destination. This process continues until the packet reaches its final destination.
Switching
Within local network segments, switches forward packets based on MAC addresses. When a packet arrives at a switch, it examines the destination MAC address and forwards the packet only to the port connected to the destination device.
Conclusion
In summary, packets find a computer in a network by following routing tables maintained by routers and by switches forwarding packets based on MAC addresses within local network segments. This process ensures that packets are delivered efficiently and accurately to their intended destinations within the network.