220-1201 Mobile Device Network Connectivity — 15 Questions

Question 1

A technician is troubleshooting a tablet that can connect to Bluetooth headphones but cannot connect to a Bluetooth keyboard. The keyboard is known to work with other devices. What should the technician check first?

Accepted Answer

Check if the keyboard is in pairing mode.. Bluetooth keyboards often require pairing in a specific mode, such as making the keyboard discoverable by pressing a button. If the keyboard is not in pairing mode, the tablet will not find it.

Answer

Ensure the tablet's Bluetooth is turned on.

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Update the tablet's operating system.

Answer

Reset the tablet's network settings.

Question 2

A user complains that their smartphone frequently disconnects from the office Wi-Fi and then reconnects after a few seconds. The issue occurs only when the user walks to a specific part of the building. What is the most likely cause?

Accepted Answer

The smartphone is encountering a Wi-Fi dead zone due to building materials.. Wi-Fi signals can be blocked or weakened by building materials like concrete, metal, or thick walls. The user is likely entering an area with poor signal coverage, causing the device to disconnect and then reconnect when moving back into range.

Answer

The smartphone's battery saver mode is turning off Wi-Fi.

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The office access point is overloaded with too many connections.

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The smartphone's Wi-Fi antenna is loose.

Question 3

A technician is configuring a smartphone for a user who frequently travels internationally. The user wants to avoid high roaming charges but still use data when connected to local Wi-Fi. What should the technician do?

Accepted Answer

Disable cellular data in the mobile network settings.. Disabling cellular data ensures the device only uses Wi-Fi for internet access, preventing accidental roaming charges. The user can still connect to local Wi-Fi networks for data.

Answer

Enable airplane mode and then turn on Wi-Fi.

Answer

Enable data roaming.

Answer

Set the device to 2G only.

Question 4

A user reports that their smartphone's mobile hotspot stops working after a few minutes of use. The laptop connected to it loses internet access. What is the most likely cause?

Accepted Answer

The smartphone's hotspot timeout setting is enabled.. Many mobile carriers and device manufacturers impose a timeout on hotspots to conserve battery and data. The hotspot may automatically turn off after a period of inactivity or after a set time.

Answer

The laptop's Wi-Fi adapter is faulty.

Answer

The smartphone's cellular signal is too weak.

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The laptop has a static IP address configured.

Question 5

A customer reports that their smartphone can connect to Wi-Fi at home but fails to connect to the company's 5 GHz Wi-Fi network in the office. Other devices connect fine. What is the most likely cause?

Accepted Answer

The smartphone is too far from the office access point for 5 GHz.. The 5 GHz band has shorter range and is more easily blocked by walls and obstacles. The customer's device may be too far from the access point or there may be interference, causing the connection to fail while 2.4 GHz remains available.

Answer

The smartphone's Wi-Fi antenna is damaged.

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The office access point is configured for 2.4 GHz only.

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The smartphone's Wi-Fi driver needs updating.

Question 6

A user reports that their smartphone's mobile hotspot works for a few minutes, then the connected laptop loses internet access, but the smartphone still shows a cellular data connection. The hotspot remains enabled. What is the most likely cause?

Accepted Answer

The carrier is throttling the hotspot data after a usage threshold.. Carrier throttling can reduce data speeds after a certain amount of data is used, making the connection too slow for practical use. This is common on unlimited plans that throttle after a threshold, and the hotspot may still appear active but with severely limited throughput.

Answer

The smartphone's battery saver mode is limiting hotspot performance.

Answer

The laptop's Wi-Fi adapter is overheating.

Answer

The smartphone is switching to a different cellular band.

Question 7

A technician is deploying a fleet of tablets for field workers. The tablets need to connect to a cellular network for data, but the company wants to minimize data usage. Which setting should the technician configure on each tablet?

Accepted Answer

Enable data saver mode.. Limiting background data prevents apps from using data when not in active use, which significantly reduces overall data consumption. This is a common practice for managing data usage on mobile devices.

Answer

Disable Wi-Fi.

Answer

Enable airplane mode.

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Set the preferred network type to 5G.

Question 8

A user's smartphone can send and receive text messages but cannot access the internet over cellular data. Wi-Fi internet works fine. Which setting is most likely misconfigured?

Accepted Answer

The APN settings are incorrect.. APN settings define how a device connects to the carrier's data network. If the APN is incorrect or missing, the device can still use SMS (which uses a different channel) but cannot establish a data connection.

Answer

The Wi-Fi hotspot is enabled.

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Bluetooth is turned on.

Answer

The device is in roaming mode.

Question 9

A technician is troubleshooting a smartphone that cannot connect to any Wi-Fi network. The technician has already verified that the device's Wi-Fi adapter is enabled and that other devices can connect to the same networks. What should the technician check next?

Accepted Answer

Check if the device has a static IP address configured.. A static IP address can prevent a device from obtaining a valid IP from the DHCP server, causing connection failure. This is a common issue when a device has been manually configured with an IP that is not in the network's range or is already in use.

Answer

Check the device's MAC address filter on the router.

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Check if the device's date and time are correct.

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Check if the device's Bluetooth is interfering.

Question 10

A user is setting up a new tablet and wants to share its internet connection with a laptop that has no cellular capability. The tablet has a cellular data plan. Which configuration should the user enable on the tablet?

Accepted Answer

Enable Wi-Fi hotspot.. Tethering allows a mobile device to share its cellular internet connection with other devices via Wi-Fi, Bluetooth, or USB. This is the standard method for providing internet access to a non-cellular laptop.

Answer

Enable Bluetooth pairing only.

Answer

Enable airplane mode.

Answer

Enable NFC.

Question 11

A user reports that their smartphone can connect to Wi-Fi at home but not at the office. Other devices connect fine to the office Wi-Fi. What is the most likely cause?

Accepted Answer

The smartphone has the wrong Wi-Fi password or security type saved.. This scenario tests understanding of Wi-Fi configuration issues. The most common cause is an incorrect password or security mismatch on the device, as other devices connect successfully to the same network.

Answer

The smartphone's Wi-Fi antenna is damaged.

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The office Wi-Fi router is out of range.

Answer

The smartphone's IP address is static and conflicting.

Question 12

A user's smartphone can connect to a corporate Wi-Fi network but cannot access any internet sites. Other devices on the same network work fine. The smartphone shows it is connected with full signal. What is the most likely cause?

Accepted Answer

The smartphone's DNS settings are misconfigured or pointing to a non-functional server.. This scenario points to a device-specific issue, such as an incorrect DNS server setting. The device can connect to the local network (Wi-Fi) but DNS resolution fails, preventing internet access.

Answer

The corporate network is blocking the smartphone's MAC address.

Answer

The smartphone's Wi-Fi adapter is faulty.

Answer

The corporate proxy server is down.

Question 13

A technician is deploying a fleet of tablets for a retail store that uses a captive portal for guest Wi-Fi. After connecting to the Wi-Fi, the tablets do not automatically open the login page. What is the most likely missing configuration?

Accepted Answer

The tablets have a static IP address configured.. Captive portals require the device to detect the portal and open a browser. If the tablet has a static IP or the captive portal detection feature is disabled, the login page will not appear automatically.

Answer

The tablets are using a VPN.

Answer

The Wi-Fi network is hidden.

Answer

The tablets have Bluetooth disabled.

Question 14

A user reports that their iPhone cannot send or receive MMS messages, but SMS works fine. They have enabled cellular data. What is the most likely missing configuration?

Accepted Answer

The MMS APN settings are incorrect or missing.. MMS requires specific APN settings for the carrier, including MMS proxy and port. Even with cellular data on, incorrect or missing MMS APN fields will prevent MMS from working.

Answer

The phone's iMessage is disabled.

Answer

The phone is in Airplane Mode.

Answer

The recipient's phone does not support MMS.

Question 15

A technician is troubleshooting a laptop that connects to a Wi-Fi network but gets a 'No Internet, Secured' message. The laptop has a static IP address configured. What is the most likely issue?

Accepted Answer

The laptop's static IP address is not in the same subnet as the router.. This tests understanding of IP configuration. A static IP that is not in the same subnet as the router or has an incorrect default gateway will prevent internet access even though the Wi-Fi link is established.

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The Wi-Fi network's SSID is hidden.

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The laptop's Wi-Fi driver is corrupted.

Answer

The router's DHCP server is disabled.