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What is the primary function of roaming in mobile networking?
a. To prevent access to local networks
b. To enable seamless connectivity outside one’s home network
c. To limit data usage
d. To improve device battery life
Answer: b. To enable seamless connectivity outside one’s home network.javna+1
In Wi-Fi, what triggers a client to start the roaming process?
a. High bandwidth demand
b. Low downlink RSSI (signal strength)
c. Firmware update
d. Reboot of the device
Answer: b. Low downlink RSSI (signal strength).info.huawei
Which wireless protocol is specifically designed to enable fast transitions during roaming?
a. 802.11a
b. 802.11g
c. 802.11r
d. 802.1Q
Answer: c. 802.11r.teldat+1
In the context of mobile networks, what is a “visited network”?
a. The original service provider’s network
b. The network used before a device is activated
c. A local network where the roaming user is currently connected
d. The backup network for emergencies
Answer: c. A local network where the roaming user is currently connected.javna
Which of the following best describes national roaming?
a. Roaming within one’s home country
b. Roaming only in rural areas
c. Roaming in another country
d. Roaming on different devices
Answer: a. Roaming within one’s home country.javna
Which type of handover involves moving between different subnets?
a. Layer 1 roaming
b. Layer 2 roaming
c. Layer 3 roaming
d. Hybrid roaming
Answer: c. Layer 3 roaming.info.huawei
What are the main phases of Wi-Fi roaming?
a. Triggering, scanning, selecting, handover
b. Booting, shutting down, scanning, reconfiguring
c. Encrypting, authenticating, tunneling, scanning
d. Initiating, probing, deleting, encrypting
Answer: a. Triggering, scanning, selecting, handover.info.huawei
What is the role of protocol 802.11k in Wi-Fi roaming?
a. Facilitates fast re-authentication
b. Provides information about neighboring APs to clients
c. Manages MAC address allocation
d. Delivers encryption keys
Answer: b. Provides information about neighboring APs to clients.come-star+1
What term describes a seamless transition as a client moves between APs without noticeable interruption?
a. Session snapping
b. Layering
c. Seamless roaming
d. Key roaming
Answer: c. Seamless roaming.lenovo+1
Which protocol is commonly used to maintain mobile IP connectivity when switching between networks?
a. UDP
b. Mobile IP
c. HTTP
d. DNS
Answer: b. Mobile IP.lenovo
What does the Basic Service Set Identifier (BSSID) represent?
a. The IP address of an access point
b. The MAC address of the AP’s radio interface
c. VLAN ID
d. Username for authentication
Answer: b. The MAC address of the AP’s radio interface.networkacademy
When an SSID maps to a VLAN, what does this indicate in Wi-Fi roaming scenarios?
a. The SSID is not used
b. That the APs belong to the same logical network segment
c. That clients lose connectivity
d. SSIDs are disabled
Answer: b. That the APs belong to the same logical network segment.networkacademy
During active scanning for roaming, what does a client send to locate nearby APs?
a. Beacon frames
b. Probe Request frames
c. ARP requests
d. ICMP packets
Answer: b. Probe Request frames.info.huawei
What technology is designed to avoid re-authentication during fast AP switches?
a. 802.1D Spanning Tree
b. 802.11r Fast Transition
c. 802.3ad Link Aggregation
d. 802.1X Port Security
Answer: b. 802.11r Fast Transition.teldat+1
What is inter-operator settlement in mobile roaming?
a. The process of distributing firmware updates to roaming users
b. Agreements between operators for charging and billing clients using foreign networks
c. Assigning new SIM cards to every user
d. Disabling unused devices
Answer: b. Agreements between operators for charging and billing clients using foreign networks.globalyo
What does the 802.11v protocol primarily enable?
a. Device load balancing and network optimization for better roaming
b. MAC address filtering
c. Firmware rollback
d. Manual key entry for authentication
Answer: a. Device load balancing and network optimization for better roaming.come-star
Which method of scanning for APs involves passive listening for beacons?
a. Passive scanning
b. Manual scanning
c. Directed scanning
d. ARP scanning
Answer: a. Passive scanning.info.huawei
What is the main difference between internal and external roaming in WLANs?
a. Internal occurs on the same network; external is between different networks
b. Internal is slower than external
c. External occurs in the same AP
d. There is no difference
Answer: a. Internal occurs on the same network; external is between different networks.watelectronics
For what reason does a roaming client device assess the signal quality from neighboring APs?
a. To download updates
b. To optimize and maintain the best possible connection
c. To delete old profiles
d. To switch to 2G
Answer: b. To optimize and maintain the best possible connection.networkacademy+1
How does Layer 2 roaming differ from Layer 3 roaming?
a. Layer 2 keeps the same subnet; Layer 3 changes it
b. Both always change the subnet
c. Layer 3 only works in WANs
d. Layer 2 requires reboot
Answer: a. Layer 2 keeps the same subnet; Layer 3 changes it.info.huawei
What is a “home network” in mobile roaming?
a. The network currently in use
b. The original service provider’s network
c. The network with the highest RSSI
d. The network outside the country
Answer: b. The original service provider’s network.globalyo+1
Which component often authenticates a mobile device during international roaming?
a. Firewall
b. Visited network
c. SIM card
d. DHCP server
Answer: c. SIM card.javna
What is the purpose of the GPRS Tunneling Protocol (GTP) in roaming?
a. To route voice calls outside of coverage
b. To manage mobility and communication between network nodes in cellular networks
c. To encrypt voice data only
d. To query DNS servers
Answer: b. To manage mobility and communication between network nodes in cellular networks.lenovo
What does the 802.11k protocol assist the physical layer of the client device in doing?
a. Firmware encryption
b. Searching for nearby APs
c. Resetting passwords
d. Updating MAC addresses
Answer: b. Searching for nearby APs.antaira+1
A seamless AP switch without noticeable disconnection is most critical for:
a. Email access
b. VoIP and video calls
c. Background downloads
d. SMS authentication
Answer: b. VoIP and video calls.come-star+1
Which best describes an “SSID” in wireless networking?
a. Secure Service Identity Device
b. Switch Synchronization ID
c. Service Set Identifier
d. Secure Service Integration Device
Answer: c. Service Set Identifier.networkacademy
Why is Power Saving Mode significant in roaming with 802.11v?
a. Increases battery drain
b. Allows network to manage client’s power needs during handover
c. Disables all APs
d. Blocks roaming
Answer: b. Allows network to manage client’s power needs during handover.come-star
When is international roaming most commonly used?
a. Moving between floors in one building
b. Traveling between countries
c. Roaming between VLANs
d. Local AP switching
Answer: b. Traveling between countries.javna
What factor can negatively affect roaming performance?
a. Dense AP placement
b. Minimal interference
c. AP placement errors or excessive interference
d. Using modern protocols
Answer: c. AP placement errors or excessive interference.lenovo
In the 802.11k protocol, what is a “neighbor report”?
a. Financial statement
b. List of AP candidates for roaming
c. List of blocked MAC addresses
d. SSID list
Answer: b. List of AP candidates for roaming.teldat+1
Which activity is a client device performing during Layer 2 roaming?
a. Changing VLANs
b. Moving between APs in the same subnet
c. Downloading new drivers
d. Changing IP addresses
Answer: b. Moving between APs in the same subnet.info.huawei
What does “handover” refer to in roaming terminology?
a. Changing wireless standards
b. Transitioning from one AP to another while maintaining connectivity
c. Swapping SIM cards
d. Updating firmware
Answer: b. Transitioning from one AP to another while maintaining connectivity.networkacademy+1
What does a “seamless handover” prevent in Wi-Fi?
a. Network congestion
b. Service interruption during AP switch
c. Client list update
d. Security protocol change
Answer: b. Service interruption during AP switch.lenovo
Which protocol combination is most relevant for a modern enterprise Wi-Fi network seeking optimal roaming performance?
a. 802.1Q/802.1D
b. 802.11k/802.11r/802.11v
c. 802.3ad/802.3af/802.3at
d. PPPoE/L2TP/IPSec
Answer: b. 802.11k/802.11r/802.11v.come-star
What is the “SSID” used for during the roaming process?
a. Identifies the specific wireless network to connect to
b. Encrypts traffic
c. Assigns subnet masks
d. Updates firmware
Answer: a. Identifies the specific wireless network to connect to.networkacademy
What happens if a network’s roaming agreements are not in place?
a. Increased data rate
b. Denied network access for roaming users
c. Reduced roaming charges
d. Always connects at 5 GHz
Answer: b. Denied network access for roaming users.javna
What does Diameter protocol provide in mobile networks relevant to roaming?
a. Authentication, authorization, and accounting functions
b. Address translation only
c. Layer 2 switching
d. Access point naming
Answer: a. Authentication, authorization, and accounting functions.lenovo
In the wireless roaming process, what follows “triggering”?
a. Disconnecting
b. Scanning for other APs
c. Rebooting
d. Encrypting
Answer: b. Scanning for other APs.info.huawei
Which wireless protocol directly reduces reconnection time during the roaming handoff by optimizing authentication?
a. 802.1X
b. 802.11r
c. 802.3af
d. 802.11ac
Answer: b. 802.11r.teldat+1
When does Layer 3 roaming occur?
a. Device moves across different subnets
b. Device remains on the same subnet
c. Device switches to 2G
d. Device powers off
Answer: a. Device moves across different subnets.info.huawei
Which is a primary benefit of seamless Wi-Fi roaming?
a. Increased service disruption
b. Uninterrupted user productivity and satisfaction
c. More complex wiring
d. Frequent authentication prompts
Answer: b. Uninterrupted user productivity and satisfaction.lenovo+1
Which mobile network component logs the activities of roaming users for billing purposes?
a. Access point
b. Core switch
c. Visited network
d. DHCP server
Answer: c. Visited network.globalyo+1
For roaming, what does a “home agent” manage in Mobile IP?
a. Device battery charging
b. Assigns a care-of-address for the mobile node
c. Loads the SSID list
d. Decrypts Wi-Fi packets
Answer: b. Assigns a care-of-address for the mobile node.lenovo
What is a practical user-facing symptom when Wi-Fi roaming is not seamless?
a. Faster network speed
b. Interruptions or drops in active sessions (e.g., calls/videos)
c. Improved battery life
d. Encrypted traffic
Answer: b. Interruptions or drops in active sessions (e.g., calls/videos).networkacademy+1
Which protocol is involved in authentication, authorization, and accounting (AAA) for cellular and LTE networks?
a. SMTP
b. Diameter
c. DNS
d. IMAP
Answer: b. Diameter.lenovo
In Wi-Fi, what does a wireless client look for when deciding when and where to roam?
a. MAC addresses only
b. Signal strength and AP load
c. VLAN assignment only
d. Username list
Answer: b. Signal strength and AP load.teldat+1
What protocol enables clients to make more informed AP selection decisions during roaming?
a. 802.11k
b. 802.3af
c. 802.11b
d. 802.11n
Answer: a. 802.11k.come-star
What kind of agreement must mobile network operators establish to support international roaming?
a. ISP alliance
b. Roaming agreement
c. VLAN contract
d. SSID sharing
Answer: b. Roaming agreement.globalyo+1
How are roaming charges typically billed to users?
a. Flat monthly fee for all activity
b. Based on activity logged by the visited network and reported to the home network
c. Ignored if user is international
d. Only by time spent abroad
Answer: b. Based on activity logged by the visited network and reported to the home network.globalyo
Which is a recommended practice when planning WLANs for optimal Layer 2 roaming?
a. Place APs on the same VLAN for same-floor coverage
b. Use different subnets within the same building
c. Assign random SSIDs for every AP
d. Avoid wireless controllers
Answer: a. Place APs on the same VLAN for same-floor coverage.info.huawei

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