In a cisco OfficeExtend environment, which encryption type n und between the access point and the mass LAW controller?

DTLS (Datagram Transport Layer Security) is the standard encryption protocol used in Cisco OfficeExtend deployments to establish a secure, encrypted CAPWAP tunnel between the OfficeExtend access point (OEAP) and the centralized Wireless LAN Controller (WLC) over the internet. DTLS provides security for UDP-based protocols like CAPWAP, ensuring data confidentiality and integrity.

TIS (Trusted Information System) is not a standard encryption protocol used in Cisco wireless or networking environments.

STIS is not a recognized or standard encryption protocol in the context of Cisco wireless or network security.

OpenSSL is an open-source cryptographic library that implements various protocols including DTLS, but it is a software toolkit rather than an encryption type itself.