Getting a datagram from source to dest.
Arriving at 223.1.4, destined for 223.1.2.2
- look up network address of E
- E on same network as router’s interface 223.1.2.9
- router, E directly attached
- link layer sends datagram to 223.1.2.2 inside link-layer frame via interface 223.1.2.9
- datagram arrives at 223.1.2.2!!! (hooray!)