Question: What sublayer enables routing over multiple hops on the wireless backhaul for F1-U and F1-C protocols in an Integrated Access and Backhaul (IAB) network?
Option 1: IP transport layer
Option 2: Backhaul Adaptation Protocol (BAP)
Option 3: BH RLC channels
Option 4: SRBs
Explanation: The correct answer is the Backhaul Adaptation Protocol (BAP) sublayer, which enables routing over multiple hops on the wireless backhaul for F1-U and F1-C protocols in an IAB network. This is specified in the provided text as "The IP layer is carried over the Backhaul Adaptation Protocol (BAP) sublayer, which enables routing over multiple hops."