In which technology is network level encrypted not natively incorporated?

Kerberos is a network authentication protocol that uses tickets and symmetric key cryptography to verify identity, but it does not natively encrypt network-level traffic as part of its core design - it authenticates users without providing transport-layer or network-layer encryption on its own.

SSL (Secure Sockets Layer) is specifically designed to encrypt network communications at the transport layer, making network-level encryption a native and core feature.

TLS (Transport Layer Security) is the modern successor to SSL and natively provides network-level encryption for data in transit as its primary function.

IPsec operates at the network layer and natively encrypts IP packets end-to-end, making network-level encryption central to its design.