Netgear ProSafe AX742 24Gbps Stacking Kit. This accessory kit is utilized to connect two switches together in order to configure them into an operational stack of switches. The kit supplies 2 AX744 Stacking modules and a CX4 stacking cable. A minimum of a single kit is required to create a stack between two switches. A group of up to 8 switches can be interconnected to form a single stack by cascading the connections between switches. It is recommended that a final connection be established between the first and the last switch to create a loop topology. This provides two 24Gbps connections per switch within the stack. Once connected the stack operates as a 48Gbps resilient, self-healing, bi-directional ring.