Question: What happens to the DRB and/or SRB connections between the UE and the SN during N2 and Xn handover?
Option 1: The connections are updated with new security keys.
Option 2: The connections remain unchanged, but the SN RRC and UP keys are refreshed.
Option 3: The connections are released, and the SN and the UE delete the SN RRC and UP keys.
Option 4: The connections are suspended until the handover is complete.
Explanation: During N2 and Xn handover, the DRB and/or SRB connections between the UE and the SN need to be released to ensure a secure transition. This involves deleting the existing SN RRC and UP keys, which will be refreshed by the new KSN derived by the target-MN.