Refer to the exhibit. An architect is designing a Layer 2 network for a customer. The network will use the spanning-tree protocol. During a link failure between SW1 and SW2, the fastest possible…

UplinkFast is a Cisco proprietary feature that provides rapid convergence in STP by immediately transitioning a backup uplink port to forwarding state when the primary root port fails, without waiting for standard STP timers. It is specifically designed for switches with redundant links to the distribution or core layer.

PortFast immediately transitions an access port to the forwarding state, bypassing the listening and learning states, but it is used for end-host ports and does not help with uplink failures between switches.

BackboneFast is a Cisco proprietary feature that speeds up convergence when an indirect link to the root bridge fails (i.e., a link failure not on the switch's direct root port or an alternate port).

Loop Guard prevents alternate or root ports from becoming designated ports, protecting against Layer 2 loops, but it does not accelerate convergence during a link failure.