A network engineer must configure the Cisco ASA so that Cisco AnyConnect clients establishing an SSL VPN connection create an additional tunnel for real-time traffic that is sensitive to packet…

DTLS (Datagram TLS) establishes an additional UDP-based tunnel in parallel with the TLS connection, reducing latency for real-time traffic such as voice and video, and automatically falls back to the TLS tunnel if the DTLS tunnel encounters any issues.

DSCP Preservation copies DSCP markings from inner packets to outer tunnel headers for QoS consistency but does not create an additional tunnel or provide a fallback mechanism for real-time traffic.

Dead Peer Detection (DPD) actively monitors the liveness of the VPN tunnel and detects when the DTLS path is unreachable or degraded, triggering the fallback from the DTLS tunnel to the TLS connection as required.

SSL Rekey periodically renegotiates TLS session keys to limit key exposure over time and does not establish a separate UDP-based tunnel or provide latency benefits for delay-sensitive traffic.

OMTU (Optimal MTU) probes for the optimal MTU to avoid fragmentation across the VPN path but does not create an additional tunnel or offer any fallback capability for real-time traffic.