DNN (Data Network Name)

In telecom networks, the DNN is the 5G identifier (equivalent to the LTE APN) that specifies the external data network a PDU Session connects to, together with the associated S-NSSAI for the slice. SMF and UPF selection depend on the DNN and S-NSSAI combination.

Categories: Core NetworkSecurity ControlsInternet and Routing

DNN in context

The mobile core carries subscriber sessions, mobility and policy. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF.

Security controls span signaling firewalls (SS7/Diameter/GTP screening), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36.

To place DNN in the wider telecom-security picture, review Authorization, Decryption, SCP, 3G, 5G SBA and ACL — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.