What type of switch is S2700?

Which of the following devices can bring interference to Wi-Fi devices?

AR G3 series routers support built-in wireless LAN controller. Howerver Cisco must use the Wireless LAN Controller Module to support the Function. Furthermore, ISR800 and ISR1900 series cannot support this AC module.

VS (Virtual System) is 1:16 for CloudEngine 12800

() is the name of DC switches, () is the name for the DC solution (Multiple Choice)