A user is experiencing delays on audio calls over a Cisco AnyConnect VPN. Which implementation step resolves this issue?

3DES is a slower, more computationally expensive cipher than AES; switching to it would increase encryption processing time and worsen latency rather than improve it.

A shorter key lifetime triggers more frequent IKE rekeying events, adding periodic overhead to the tunnel rather than reducing audio delay.

AnyConnect 2.3 is an obsolete client version that predates modern DTLS optimizations and does not address the fundamental TCP-versus-UDP transport issue causing audio delays.

AnyConnect defaults to TLS over TCP for its tunnel, which introduces head-of-line blocking and retransmission delays that are especially harmful to real-time audio. DTLS (Datagram Transport Layer Security) uses UDP as its transport layer, providing the low-latency, loss-tolerant path that voice and video traffic requires. Enabling DTLS on the ASA headend and AnyConnect profile allows real-time media to bypass TCP overhead entirely.