Which of the following technologies can be utilized in a wireless network environment to provide secure SSO access for WiFi and network resources?

A user's mobile device appears to be losing battery life rapidly and often feels warm to the touch, even when it is put away. The device is relatively new, so the user is concerned it is defective. A technician inspects the device and see the following:

Which of the following should be changed to resolve this issue?

Ann, a user, has purchased a new Android phone and is attempting to access a public hotspot. When she opens a browser, she gets a message indicating the page cannot be displayed. She notices there is a "?" in the radio icon in the toolbar. She has verified Bluetooth is active, airplane mode is off, and tethering is turned on.
She uses the cell phone to call a technician for assistance.
Which of the following is the MOST likely issue Ann is experiencing?

Users are reporting slow connections on their mobile devices when trying to download large data files from the network servers, but users on wired connections are not having any issues. A network technician notices multiple alerts about wireless access points going offline, and several devices connecting to the WLAN are unable to authenticate successfully, Which of the following issues are the mobile users experiencing?

Which of the following should be done prior to installing replacement RAM modules into a desktop computer?