A user calls the help desk reporting that their laptop is experiencing limited connectivity when connected to the office's wireless network. The laptop successfully obtains an IP address but cannot access internal network resources or the internet. The user's smartphone, connected to the same wireless network, has full connectivity. Which of the following should the technician investigate FIRST to resolve the issue?
Check the Network Access Control (NAC) settings for any restrictions on the user's laptop.
Ensure that the laptop is connected to the correct SSID.
Check if the Ethernet cable is securely plugged into the laptop.
Verify if the DHCP scope is full.