Review: Mobile Devices (Applied)

A technician notices that a laptop battery is visibly bulging and the bottom case is slightly warped. What is the correct first action?

• Run a battery diagnostic tool to check charge capacity

• Power off the laptop and replace the swollen battery immediately

• Connect the laptop to AC power and monitor temperature

• Reinstall the battery driver from Device Manager

A user reports that their laptop screen looks washed out in bright rooms but works well in the dark. Which display panel type is most likely installed?

• OLED, because it uses self-emitting pixels with no backlight.

• IPS, because it has wide viewing angles but lower peak brightness.

• CCFL, because it relies on a fluorescent inverter for brightness.

• TN, because it has limited viewing angles and lower contrast.

A field technician needs to add a second wireless card to a laptop that has an open expansion slot next to the existing SSD. The slot is keyed with a single notch and labeled M.2. Which component should the technician order?

• An M.2 wireless card in the correct key format for that slot

• A PCIe x1 wireless card designed for desktop motherboards

• A USB wireless adapter that connects to an internal header

• A Mini PCIe wireless card with a 52-pin connector

A technician is upgrading a laptop and wants to know which components can typically be replaced without replacing the entire motherboard. Select TWO components that are commonly user-replaceable in laptops.

• RAM module (so-dimm)

• GPU integrated into the processor package

• CPU soldered directly to the motherboard

• 2.5-inch SATA SSD in a removable bay

A help desk technician is setting up a new employee's phone with company email. The IT policy requires that apps be approved before installation and that corporate data be wiped remotely if the phone is lost. Which solution enforces both of these requirements?

• Enrolling the device in a Mobile Device Management (MDM) platform

• Connecting the phone to the corporate Wi-Fi using WPA3

• Configuring a POP3 account with SSL encryption enabled

• Enabling two-factor authentication on the user's email account

A user wants to access email on two devices and have messages stay in sync so that reading a message on one device marks it read on the other. Which email protocol supports this behavior?

• POP3, because it downloads messages to a single local device

• IMAP, because it stores messages on the server and syncs state across devices

• MIME, because it encodes attachments for multi-device access

• SMTP, because it pushes messages to multiple recipients

A technician is connecting a smartphone to a public Wi-Fi hotspot at a coffee shop. The network is listed as open with no lock icon. What security risk does this present?

• The phone will default to a 2.4 GHz band with limited throughput.

• The network will block IMAP traffic on port 143.

• Data transmitted over the network is not encrypted by the Wi-Fi layer.

• The device will be unable to obtain an IP address automatically.

A network administrator is comparing wireless security protocols for a small office upgrade. Select TWO protocols that use strong encryption and are currently recommended for new deployments.

• WPA3 with SAE authentication

• WPA with TKIP encryption

• WPA2 with AES encryption

• WEP (Wired Equivalent Privacy)

A user reports that their phone can connect to a 2.4 GHz Wi-Fi network but not the 5 GHz network at the same location. The technician confirms the 5 GHz SSID is visible on other devices. What is the most likely explanation?

• The router is broadcasting on 802.11b, which only uses 2.4 GHz.

• The phone's NFC chip is interfering with the 5 GHz radio.

• The 5 GHz band has more range than 2.4 GHz and is overloaded.

• The phone's wireless card does not support the 5 GHz band.

A technician is documenting wireless standards for a client. Which 802.11 standard operates on both 2.4 GHz and 5 GHz bands and supports a maximum theoretical speed of approximately 600 Mbps?

• 802.11a, dual-band at up to 54 Mbps

• 802.11ac, 5 GHz only at up to approximately 3.5 Gbps

• 802.11n, dual-band at up to approximately 600 Mbps

• 802.11g, single-band at up to 54 Mbps