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Telecom Foundations
The GPRS Tunneling Protocol has been the workhorse of mobile data transport since the 3G era and remains essential in 5G networks today. GTP creates logical tunnels between network nodes by encapsulating your original IP packets inside a new GTP header and an outer IP header, allowing user data to traverse the core network independently of the underlying routing infrastructure. This tunneling approach is what makes seamless mobility possible, because when you move between cell towers, the network simply updates the tunnel endpoint rather than interrupting your data session or changing your…
Try these first, even if you're not sure. Guessing primes your brain.
Why does the operator wrap your packet in a GTP tunnel?
On a moving car call, the video never blinks across towers. Why?
Why not route users directly by their public IP inside the core?
Answer all 3to continue — it's OK to be wrong.