I have so many network adapters on my PC. If I type for example "Ping 192.168.191.128", how does my PC now which network adapter to use?
What if it's a DNS name like "mylocal.ddd.com", how does my PC now which adapter configured DNS server to look for?
All IP devices have a routing table which tells what interface to use to transmit a packet. When the PC has a packet to send, it looks up the destination in the routing table and finds the best (longest) match. It's very common to have a default route (also called a default gateway) that matches any destination.
On a windows PC, you can see the routing table by typing route print.
