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CCNA Mobile Device Network Connectivity Questions

30 questions · Mobile Device Network Connectivity · All types, answers revealed

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1
MCQmedium

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?

A.Ensure the tablet's Bluetooth is turned on.
B.Check if the keyboard is in pairing mode.
C.Update the tablet's operating system.
D.Reset the tablet's network settings.
AnswerB

Many Bluetooth keyboards require a button press to enter pairing mode. If not in pairing mode, the tablet cannot discover it.

Why this answer

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.

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2
MCQeasy

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?

A.The smartphone's battery saver mode is turning off Wi-Fi.
B.The office access point is overloaded with too many connections.
C.The smartphone is encountering a Wi-Fi dead zone due to building materials.
D.The smartphone's Wi-Fi antenna is loose.
AnswerC

Building materials such as concrete or metal can create dead zones where the signal is too weak, causing intermittent disconnections.

Why this answer

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.

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3
MCQeasy

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?

A.Enable airplane mode and then turn on Wi-Fi.
B.Disable cellular data in the mobile network settings.
C.Enable data roaming.
D.Set the device to 2G only.
AnswerB

This stops all cellular data usage while allowing Wi-Fi to remain active, preventing roaming charges when connected to Wi-Fi.

Why this answer

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.

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4
MCQeasy

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?

A.The smartphone's Wi-Fi antenna is damaged.
B.The office Wi-Fi router is out of range.
C.The smartphone has the wrong Wi-Fi password or security type saved.
D.The smartphone's IP address is static and conflicting.
AnswerC

A saved incorrect password or mismatched security type (e.g., WPA2 vs WPA3) prevents connection while other devices succeed.

Why this answer

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.

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5
MCQmedium

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?

A.The laptop's Wi-Fi adapter is faulty.
B.The smartphone's hotspot timeout setting is enabled.
C.The smartphone's cellular signal is too weak.
D.The laptop has a static IP address configured.
AnswerB

Hotspot timeout settings automatically disable the hotspot after a period of inactivity or a set duration to save power and data.

Why this answer

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.

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6
MCQhard

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?

A.The smartphone's DNS settings are misconfigured or pointing to a non-functional server.
B.The corporate network is blocking the smartphone's MAC address.
C.The smartphone's Wi-Fi adapter is faulty.
D.The corporate proxy server is down.
AnswerA

Incorrect DNS prevents domain name resolution, so the device cannot reach internet sites even though it is connected to the network.

Why this answer

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.

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7
MCQeasy

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?

A.The smartphone's Wi-Fi antenna is damaged.
B.The office access point is configured for 2.4 GHz only.
C.The smartphone is too far from the office access point for 5 GHz.
D.The smartphone's Wi-Fi driver needs updating.
AnswerC

5 GHz has shorter range and lower penetration through obstacles. The customer may be in a location where the 5 GHz signal is too weak, while 2.4 GHz still works.

Why this answer

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.

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8
MCQhard

A company deploys several tablets for field technicians that need to connect to a private LTE network via a SIM card. One tablet connects to the network but has very slow data speeds. Other tablets in the same area work fine. What is the most likely cause?

A.The tablet's Wi-Fi is interfering with the LTE signal.
B.The tablet's SIM card is not fully inserted.
C.The tablet is using the wrong APN configuration.
D.The tablet's battery saver mode is enabled.
AnswerC

An incorrect APN can still allow data but may route through a slower gateway or have restrictions, resulting in poor performance.

Why this answer

APN settings define how the device connects to the carrier's data network. An incorrect APN can result in connectivity but with throttled or misrouted data, leading to slow speeds.

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9
MCQhard

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?

A.The smartphone's battery saver mode is limiting hotspot performance.
B.The carrier is throttling the hotspot data after a usage threshold.
C.The laptop's Wi-Fi adapter is overheating.
D.The smartphone is switching to a different cellular band.
AnswerB

Many carriers throttle hotspot data after a certain amount of usage, causing the connection to become too slow to load pages, even though the hotspot is still enabled.

Why this answer

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.

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10
MCQmedium

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?

A.Enable data saver mode.
B.Disable Wi-Fi.
C.Enable airplane mode.
D.Set the preferred network type to 5G.
AnswerA

Data saver mode restricts background data usage and can also limit foreground data for some apps, helping to minimize overall data consumption.

Why this answer

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.

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11
MCQmedium

A user reports that their laptop can see multiple Wi-Fi networks but cannot connect to any of them. Other devices in the same location connect without issue. What is the most likely cause?

A.The laptop's wireless adapter is disabled in Device Manager.
B.The Wi-Fi router is out of range.
C.The laptop has an incorrect or outdated Wi-Fi password saved for the networks.
D.The laptop's Bluetooth is interfering with Wi-Fi.
AnswerC

A wrong password prevents authentication even if the network is visible; forgetting the network and re-entering the password often resolves this.

Why this answer

Seeing networks but failing to connect often points to a misconfiguration on the device, such as an incorrect security key or saved credentials that no longer match. This is a common troubleshooting step.

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12
MCQeasy

A customer reports that their smartphone connects to Wi-Fi at home but cannot connect to the corporate Wi-Fi network at their office. The office uses WPA2-Enterprise with 802.1X authentication. What is the most likely reason for the connectivity failure?

A.The phone's Wi-Fi antenna is damaged.
B.The corporate network requires a different security protocol like WEP.
C.The phone does not have the correct 802.1X credentials configured for the corporate SSID.
D.The phone is out of range of the corporate access point.
AnswerC

WPA2-Enterprise uses 802.1X authentication, which requires a username/password or certificate, unlike the home PSK.

Why this answer

WPA2-Enterprise requires 802.1X authentication, which typically needs a username and password or certificate, not just a pre-shared key. The home network likely uses WPA2-Personal (PSK), so the phone's saved credentials for home won't work at the office.

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13
MCQhard

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?

A.The tablets have a static IP address configured.
B.The tablets are using a VPN.
C.The Wi-Fi network is hidden.
D.The tablets have Bluetooth disabled.
AnswerA

Static IPs can bypass DHCP, which is often needed for captive portal redirection; the device may not receive the redirect address.

Why this answer

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.

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14
MCQmedium

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?

A.The phone's iMessage is disabled.
B.The MMS APN settings are incorrect or missing.
C.The phone is in Airplane Mode.
D.The recipient's phone does not support MMS.
AnswerB

MMS requires proper APN configuration for the carrier, including MMS proxy and port, which are often separate from data APN.

Why this answer

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.

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15
MCQeasy

A user is traveling internationally and complains that their smartphone's cellular data stopped working after landing. They have an international roaming plan activated. What should the technician check first to restore data connectivity?

A.Verify that the SIM card is not locked to the home carrier.
B.Check if the device's date and time are set correctly.
C.Ensure that the device's data roaming setting is enabled.
D.Reset the device's network settings to default.
AnswerC

Data roaming must be turned on to use cellular data on foreign networks; it's often disabled by default to prevent charges.

Why this answer

When traveling internationally, devices often need to have data roaming enabled in the settings to use cellular data on foreign networks. This is a common oversight even with an active roaming plan.

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16
MCQhard

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?

A.The Wi-Fi network's SSID is hidden.
B.The laptop's static IP address is not in the same subnet as the router.
C.The laptop's Wi-Fi driver is corrupted.
D.The router's DHCP server is disabled.
AnswerB

A mismatched subnet means the laptop cannot communicate with the default gateway, so internet access fails.

Why this answer

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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17
MCQmedium

A user's iPhone connects to a public Wi-Fi hotspot but cannot load any web pages. The Wi-Fi icon shows full signal. Other devices on the same network work fine. What is the most likely issue?

A.The iPhone's DNS settings are misconfigured.
B.The iPhone is not accepting the captive portal's terms and conditions.
C.The iPhone's Wi-Fi antenna is faulty.
D.The public Wi-Fi network is using an incompatible security protocol.
AnswerB

Many public Wi-Fi networks require accepting terms via a web page; if the portal doesn't load or the user hasn't accepted, internet access is blocked.

Why this answer

Public Wi-Fi often uses a captive portal that requires web authentication. If the portal page does not automatically appear, the user may need to open Safari or go to a non-HTTPS site to trigger it.

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18
MCQmedium

A technician is configuring a company-issued tablet for a sales representative who frequently works from a car. The tablet needs internet access for CRM software and GPS navigation. Which mobile network connectivity option is most appropriate for this scenario?

A.Connect the tablet to a personal hotspot from the sales rep's smartphone.
B.Install a Wi-Fi extender in the car to boost nearby public Wi-Fi signals.
C.Use a tablet with an integrated cellular modem and a company data plan.
D.Rely on Bluetooth tethering to a laptop for internet access.
AnswerC

A cellular modem provides dedicated, always-on internet access without relying on other devices or Wi-Fi networks.

Why this answer

An integrated cellular modem (4G/5G) provides reliable internet access on the go, independent of Wi-Fi hotspots. This is ideal for mobile workers who need constant connectivity while traveling.

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19
MCQeasy

A customer complains that their smartphone's mobile hotspot stops working after a few minutes. They are using a prepaid data plan. What is the most likely cause?

A.The smartphone's battery saver mode is turning off the hotspot.
B.The connected device is out of Bluetooth range.
C.The carrier's prepaid plan restricts hotspot usage or throttles data.
D.The smartphone's Wi-Fi antenna is overheating.
AnswerC

Prepaid plans often have hotspot limits or throttling, causing the connection to drop or slow after initial use.

Why this answer

This scenario highlights carrier restrictions on tethering. Many prepaid plans limit hotspot usage or throttle data after a certain amount, causing the hotspot to disconnect or slow down.

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20
MCQmedium

A technician is setting up a new Android tablet for a warehouse worker who uses a barcode scanner app that requires constant Wi-Fi. The warehouse has multiple access points with the same SSID. The tablet frequently disconnects and reconnects as the worker moves around. What should the technician configure to improve connectivity?

A.Set the tablet to use a static IP address.
B.Disable the tablet's Bluetooth radio.
C.Configure the tablet to prefer the 2.4 GHz band over 5 GHz.
D.Enable the 'Wi-Fi roaming' or 'aggressive handover' setting in the tablet's advanced Wi-Fi options.
AnswerD

This setting optimizes the device to quickly reassociate with a stronger AP, reducing disconnects when moving.

Why this answer

Enabling the 'aggressive Wi-Fi handover' or similar roaming assist feature helps the device quickly switch between access points without dropping the connection. This is crucial in environments with multiple APs.

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21
MCQhard

A user's smartphone intermittently drops Wi-Fi connection when the device is moved from one room to another. The home uses a single Wi-Fi router. The technician suspects the issue is related to the device's power management. Which setting should be adjusted to maintain a stable connection?

A.Enable 'Wi-Fi calling' to offload calls to cellular.
B.Set the device to 'Keep Wi-Fi on during sleep' to 'Always'.
C.Disable 'Wi-Fi power saving mode' in the advanced Wi-Fi settings.
D.Change the Wi-Fi frequency band from 5 GHz to 2.4 GHz.
AnswerC

Power saving mode can throttle the Wi-Fi radio to save battery, causing drops when the signal weakens; disabling it keeps the radio at full power.

Why this answer

On many smartphones, Wi-Fi power saving mode can cause the radio to reduce power or scan less frequently, leading to disconnects when moving. Disabling this ensures the Wi-Fi radio stays active.

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22
MCQmedium

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?

A.The Wi-Fi hotspot is enabled.
B.The APN settings are incorrect.
C.Bluetooth is turned on.
D.The device is in roaming mode.
AnswerB

APN (Access Point Name) settings are required for cellular data. If misconfigured, data will not work, but SMS and calls may still function.

Why this answer

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.

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23
MCQhard

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?

A.Check if the device has a static IP address configured.
B.Check the device's MAC address filter on the router.
C.Check if the device's date and time are correct.
D.Check if the device's Bluetooth is interfering.
AnswerA

A static IP that is incorrect or conflicts with other devices can prevent Wi-Fi connectivity. The technician should check the IP settings in the Wi-Fi configuration.

Why this answer

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.

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24
MCQmedium

A user's smartphone intermittently disconnects from a known Wi-Fi network when they move to a different room. The network uses a single access point. What is the most likely cause?

A.The smartphone is connecting to the 5 GHz band, which has poor wall penetration.
B.The access point is overloaded with too many clients.
C.The smartphone's MAC address is being filtered.
D.The smartphone's battery saver mode is turning off Wi-Fi.
AnswerA

5 GHz has shorter range and is more easily blocked by walls, leading to intermittent disconnects when moving rooms.

Why this answer

This tests understanding of Wi-Fi signal propagation. 5 GHz signals attenuate quickly through walls and obstacles, causing disconnections when moving away from the access point, while 2.4 GHz has better range.

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25
MCQmedium

A technician is troubleshooting a laptop that cannot connect to a 5 GHz Wi-Fi network, but it connects to 2.4 GHz networks without issue. The laptop supports dual-band Wi-Fi. What is the most likely cause?

A.The 5 GHz router is too far from the laptop.
B.The laptop's Wi-Fi driver is outdated or misconfigured for 5 GHz.
C.The 5 GHz network is using WEP encryption.
D.The laptop's Wi-Fi card is only 2.4 GHz capable.
AnswerB

An outdated driver may not properly support 5 GHz channels or band steering, causing connection failures.

Why this answer

This tests knowledge of Wi-Fi standards and configuration. Even if a device supports dual-band, the driver or software may be set to prefer 2.4 GHz, or the 5 GHz channel may be set to a region-specific channel the laptop does not support.

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26
MCQeasy

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?

A.Enable Bluetooth pairing only.
B.Enable Wi-Fi hotspot.
C.Enable airplane mode.
D.Enable NFC.
AnswerB

A Wi-Fi hotspot (tethering) creates a local Wi-Fi network that the laptop can join to use the tablet's cellular data connection.

Why this answer

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.

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27
MCQmedium

A technician is configuring a company-issued Android tablet for a field worker who needs to use a VPN to access internal resources. The tablet connects to the internet via cellular data. After setting up the VPN, the user cannot access any internal websites. What should the technician check first?

A.Verify that the tablet's Wi-Fi is enabled.
B.Check the VPN server address and authentication credentials.
C.Ensure the tablet's date and time are set automatically.
D.Disable the firewall on the tablet.
AnswerB

Incorrect server address or credentials are the most common reasons for VPN failure, preventing the secure tunnel from forming.

Why this answer

This scenario tests VPN troubleshooting. The most common issue is incorrect VPN credentials or server address, which would prevent the tunnel from establishing. DNS settings are also critical but checking credentials is the first logical step.

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28
MCQhard

A technician is deploying a fleet of tablets that must connect to a corporate network using 802.1X authentication with certificates. After configuring the Wi-Fi profile, some tablets fail to connect. The technician verifies the SSID and security settings are correct. What is the most likely missing configuration?

A.The tablets have the wrong date and time set.
B.The tablets are missing the root CA certificate in their trusted store.
C.The tablets are using WPA2-Personal instead of WPA2-Enterprise.
D.The tablets have a static IP configured that conflicts with the DHCP scope.
AnswerB

For 802.1X with certificates, the device must trust the CA that signed the server certificate; without it, the handshake fails.

Why this answer

802.1X with certificates requires the device to trust the certificate authority (CA) that issued the server certificate. Without the CA certificate installed, the device cannot validate the server, causing authentication failure.

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29
MCQeasy

A technician is setting up a new tablet for a sales team member who travels frequently. The user needs to access the internet via cellular data and also connect to a Bluetooth headset. What should the technician configure first?

A.Enable airplane mode to prevent interference.
B.Insert the SIM card and configure the cellular APN settings.
C.Pair the Bluetooth headset first to ensure audio works.
D.Disable Wi-Fi to force cellular data usage.
AnswerB

Cellular data requires a valid SIM and correct APN settings to access the internet, which is the primary need.

Why this answer

This question tests the order of operations for mobile device connectivity. Cellular data must be enabled and configured before Bluetooth can be used for internet sharing or tethering, and Bluetooth pairing is independent but typically done after basic connectivity.

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30
MCQmedium

A technician is troubleshooting a smartphone that can send and receive text messages but cannot make or receive phone calls. The device shows full signal bars. Which network setting is most likely misconfigured?

A.The device's data roaming is turned off.
B.The device's preferred network type is set to 'LTE only' and VoLTE is disabled.
C.The device's Bluetooth is enabled.
D.The device's airplane mode is turned on.
AnswerB

On some networks, 'LTE only' without VoLTE prevents voice calls because the network doesn't fall back to 3G/2G for voice.

Why this answer

Text messages use the data channel (IMS) or signaling, while voice calls require a circuit-switched or VoLTE connection. If VoLTE is disabled but the carrier requires it, calls may fail while texts work.

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