A standalone wireless AP solution is being installed into the campus infrastructure. The access points appear to boot correctly， however， wireless clients are not obtaining correct access. You verify that the local switch configuration connected to the access point appears as the following： 
interface ethernet 0/1 
switchport access vlan 10 
switchport mode access 
spanning-tree portfast 
mls qos trust dscp 
What is the most likely issue causing the problem？（）

A campus infrastructure supports wireless clients via Cisco Aironet AG Series 1230， 1240， and 1250 access points. With DNS and DHCP configured， the 1230 and 1240 access points appear to boot and operate normally； however， the 1250 access points do not seem to operate correctly. 
What is the most likely issue causing this problem？（）