APN in LTE and DNN in 5G Core Are Similar Until the Architecture Matters
APN and DNN both identify data-network intent, but the surrounding EPC and 5GC procedures are different enough that treating them as pure renames is misleading.
APN
APNs, PGW Selection and the Path to the Data Network
An APN is more than a label on the handset; it influences how a subscriber session reaches a packet gateway and an external data network.