A network engineer is configuring TACACS+ device administration between Cisco ISE and a large campus core switch that generates a high volume of command authorization requests. To reduce the overhead of repeatedly opening and tearing down TCP connections for each AAA request, the engineer wants ISE and the NAD to reuse a single TCP connection to multiplex multiple TACACS+ sessions. Which configuration must be enabled on both the network device and the corresponding entry in ISE to achieve this?