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  1. What does ESS stand for in IEEE 802.11 networking?
    a. Extended Service Set
    b. Efficient Service System
    c. Ethernet Service Segment
    d. Enhanced Security Set
    Answer: a. Extended Service Setwikipedia+2
  2. Which device forms the core of a Basic Service Set (BSS)?
    a. Router
    b. Access Point
    c. Switch
    d. Hub
    Answer: b. Access Pointscribd+2
  3. Which statement describes an Extended Service Set?
    a. Single AP network
    b. Two or more BSS interconnected
    c. Only wireless clients
    d. Only wired clients
    Answer: b. Two or more BSS interconnectedsciencedirect+2
  4. All APs within an ESS share which network property?
    a. Unique BSSID
    b. Common SSID
    c. Multiple MAC addresses
    d. Different VLANs
    Answer: b. Common SSIDgeeksforgeeks+2
  5. What is the advantage of using ESS over a single BSS?
    a. Lower cost
    b. Greater wireless coverage
    c. Reduced complexity
    d. Less security
    Answer: b. Greater wireless coveragegeeksforgeeks+2
  6. What network component connects multiple APs within an ESS?
    a. Distribution System
    b. Virtual LAN
    c. Ethernet Cable
    d. Firewall
    Answer: a. Distribution Systemlogicapt+2
  7. In an ESS, clients perceive the network as:
    a. Multiple networks
    b. A single unified network
    c. Multiple VLANs
    d. Multiple ESSID
    Answer: b. A single unified networknetworklessons+2
  8. What service allows users to move across APs without losing connectivity in ESS?
    a. Routing
    b. Roaming
    c. Switching
    d. Bridging
    Answer: b. Roaminggeeksforgeeks+2
  9. To which layer does an ESS appear as a single BSS?
    a. Physical Layer
    b. Logical Link Control Layer
    c. Application Layer
    d. Transport Layer
    Answer: b. Logical Link Control Layersciencedirect+2
  10. Which identifier is common across all APs in an ESS?
    a. VLAN ID
    b. SSID
    c. BSSID
    d. IP address
    Answer: b. SSIDgeeksforgeeks+2
  11. Which IEEE standard defines ESS?
    a. IEEE 802.3
    b. IEEE 802.11
    c. IEEE 802.1Q
    d. IEEE 802.15
    Answer: b. IEEE 802.11wikipedia+1
  12. An ESS enables a wireless network to cover:
    a. Small rooms only
    b. Large areas such as campuses
    c. Two devices only
    d. Wired-only segments
    Answer: b. Large areas such as campuseswikipedia+2
  13. What happens when a client moves from one BSS to another within an ESS?
    a. Disconnects
    b. Roams seamlessly
    c. Re-authenticates
    d. Changes VLAN
    Answer: b. Roams seamlesslynetworklessons+2
  14. Each AP in an ESS uses a _________ identifier.
    a. Common BSSID
    b. Unique BSSID
    c. Unique SSID
    d. MAC address only
    Answer: b. Unique BSSIDwikipedia+1
  15. What does distribution system (DS) interconnect in an ESS?
    a. Wired clients
    b. Multiple APs/BSSs
    c. Switches
    d. Routers only
    Answer: b. Multiple APs/BSSscisco+2
  16. Which of the following is not an advantage of ESS?
    a. Scalability
    b. Limited coverage
    c. Centralized management
    d. Enhanced mobility
    Answer: b. Limited coveragegeeksforgeeks+1
  17. Which parameter do wireless clients use to identify an ESS?
    a. IP address
    b. SSID
    c. MAC address
    d. Port number
    Answer: b. SSIDlogicapt+1
  18. In ESS, APs are usually connected to what network type?
    a. Wired LAN
    b. WAN
    c. MAN
    d. VPN
    Answer: a. Wired LANgeeksforgeeks+2
  19. Which configuration allows wireless devices to move between BSSs in an ESS?
    a. Ad hoc mode
    b. Infrastructure mode
    c. Peer-to-peer mode
    d. Mesh mode
    Answer: b. Infrastructure modelogicapt+1
  20. What ensures seamless transition between APs in ESS?
    a. Same channel allocation
    b. Overlapping coverage areas
    c. Different SSIDs
    d. Physical proximity
    Answer: b. Overlapping coverage areasipcisco+1
  21. Which identifier is unique to each AP in ESS?
    a. SSID
    b. BSSID
    c. VLAN ID
    d. Gateway IP
    Answer: b. BSSIDnetworklessons+1
  22. In ESS topology, client stations are able to:
    a. Connect to a single AP only
    b. Roam across multiple APs
    c. Connect only via wired LAN
    d. Connect with VPN only
    Answer: b. Roam across multiple APsgeeksforgeeks+1
  23. ESS is necessary when:
    a. Only one AP is present
    b. Coverage for a large area is needed
    c. Wired connectivity only
    d. No APs present
    Answer: b. Coverage for a large area is neededwikipedia+2
  24. What protocol facilitates client movement between APs in ESS?
    a. DHCP
    b. Roaming protocols
    c. Proxy ARP
    d. Spanning Tree
    Answer: b. Roaming protocolsnetworklessons
  25. Which system supports centralized management in ESS?
    a. Standalone APs
    b. Wireless controller-based system
    c. Only switches
    d. Direct communication only
    Answer: b. Wireless controller-based systemgeeksforgeeks
  26. ESS covers which of the following network types?
    a. Local administrative domains
    b. Large physical areas
    c. WAN only
    d. Only homes
    Answer: b. Large physical areasgeeksforgeeks+2
  27. Which network parameter helps mitigate interference within ESS?
    a. Using same channels for all APs
    b. Assigning different channels to APs
    c. Using same IPs for APs
    d. Disabling wireless security
    Answer: b. Assigning different channels to APsipcisco+1
  28. Which is not a function of distribution system in ESS?
    a. Interconnecting APs
    b. Providing wireless coverage
    c. Routing packets externally
    d. Supporting client mobility
    Answer: c. Routing packets externallylogicapt+1
  29. In ESS, why is overlapping coverage between APs important?
    a. To increase interference
    b. To permit seamless roaming
    c. To restrict bandwidth
    d. To lower throughput
    Answer: b. To permit seamless roamingipcisco+1
  30. Which IEEE standard pertains to wireless local area networks using ESS?
    a. 802.11
    b. 802.3
    c. 802.15
    d. 802.1D
    Answer: a. 802.11wikipedia+1
  31. ESS can be expanded by:
    a. Adding more APs
    b. Increasing bandwidth alone
    c. Using repeaters only
    d. Restricting SSID broadcast
    Answer: a. Adding more APsgeeksforgeeks+2
  32. Clients moving from one AP to another in ESS are performing:
    a. Channel switching
    b. Roaming
    c. Handover
    d. VLAN hopping
    Answer: b. Roamingnetworklessons+1
  33. What helps distinguish individual BSSs within ESS?
    a. IP address
    b. Unique BSSID
    c. Password
    d. SSID
    Answer: b. Unique BSSIDwikipedia+1
  34. What layer in OSI model is impacted by ESS configuration?
    a. Data Link Layer
    b. Presentation Layer
    c. Application Layer
    d. Session Layer
    Answer: a. Data Link Layerscribd+1
  35. ESS setup increases:
    a. Network complexity
    b. Security flaws
    c. Speed only
    d. Single point of failure
    Answer: a. Network complexitygeeksforgeeks+1
  36. What information do APs broadcast to facilitate ESS association?
    a. Channel number only
    b. SSID and BSSID
    c. Port numbers only
    d. VLAN ID only
    Answer: b. SSID and BSSIDlogicapt+2
  37. Client mobility within ESS is described as:
    a. Wired migration
    b. Wireless handoff (roaming)
    c. Channel hopping
    d. Proxy migration
    Answer: b. Wireless handoff (roaming)ipcisco+1
  38. For seamless roaming in ESS, APs should have:
    a. Overlapping basic service areas
    b. Distinct network types
    c. Different network protocols
    d. Restricted access control
    Answer: a. Overlapping basic service areasipcisco+1
  39. Each AP in ESS is a part of which logical group?
    a. VLAN
    b. SSID group
    c. Basic Service Set
    d. Security domain only
    Answer: c. Basic Service Setwikipedia+2
  40. Which type of authentication may be centralized in ESS?
    a. Local only
    b. Centralized authentication
    c. No authentication
    d. Token-based only
    Answer: b. Centralized authenticationwikipedia
  41. ESS is used in which environments?
    a. Small offices only
    b. Enterprise networks and campuses
    c. Personal LANs only
    d. Peer-to-peer only
    Answer: b. Enterprise networks and campusesgeeksforgeeks+2
  42. Which parameter is unique for each AP but common for ESS?
    a. SSID
    b. BSSID
    c. Gateway IP
    d. Subnet Mask
    Answer: a. SSIDnetworklessons+2
  43. ESS helps wireless clients to:
    a. Remain connected while moving
    b. Switch networks manually
    c. Use multiple VLANs
    d. Restrict access
    Answer: a. Remain connected while movinggeeksforgeeks+1
  44. The logical network service set identifier for ESS is:
    a. SSID
    b. AP name
    c. VLAN name
    d. DS number
    Answer: a. SSIDlogicapt+2
  45. Which of the following is essential for creating ESS?
    a. Multiple APs
    b. Single router
    c. Proxy ARP
    d. Wired-only clients
    Answer: a. Multiple APssciencedirect+2
  46. Which network layer entity coordinates communication in ESS?
    a. Logical Link Control
    b. Network Layer
    c. Transport Layer
    d. Session Layer
    Answer: a. Logical Link Controlscribd+2
  47. When APs in ESS share the same SSID but different BSSID, this enables:
    a. Seamless roaming
    b. Channel interference
    c. Frequency clash
    d. VLAN hopping
    Answer: a. Seamless roamingnetworklessons+1
  48. What is the role of Distribution System (DS) in ESS?
    a. Connect multiple APs
    b. Restrict roaming
    c. Segment traffic by VLAN
    d. Limit SSID broadcast
    Answer: a. Connect multiple APscisco+2
  49. Which network model increases both coverage and user mobility using ESS?
    a. Wired infrastructure
    b. Wireless infrastructure
    c. Hybrid model
    d. Virtual LAN only
    Answer: b. Wireless infrastructurelogicapt+1
  50. ESS allows which device to move throughout a building without disconnecting?
    a. Switch
    b. Wireless client device (STA)
    c. Hub
    d. Fiber channel device
    Answer: b. Wireless client device (STA)wikipedia+2

 

  1. https://en.wikipedia.org/wiki/Service_set_(802.11_network)
  2. https://www.sanfoundry.com/network-security-question-bank/
  3. https://www.scribd.com/document/632675575/What-Does-Extended-Service-Set-Mean
  4. https://blog.logicapt.com/wifi-7-ieee-802-11be-concepts-definitions/
  5. https://ipcisco.com/lesson/wireless-principles/
  6. https://www.sciencedirect.com/topics/computer-science/extended-service-set
  7. https://www.geeksforgeeks.org/computer-networks/difference-between-bss-and-ess/
  8. https://www.geeksforgeeks.org/computer-networks/advantages-and-disadvantages-of-ess/
  9. https://networklessons.com/cisco/ccna-200-301/wireless-lan-802-11-service-sets
  10. https://www.cisco.com/E-Learning/bulk/guest/celc/fwl/ch2/2_1_5/index.html
  11. https://en.wikipedia.org/wiki/IEEE_802.11
  12. https://www.ieee802.org/21/doctree/2004_Meeting_Docs/2004-07_meeting_docs/21-04-0105-00-0000-what_ess.ppt
  13. https://mcqmate.com/discussion/16584/in-wireless-network-an-extended-service-set-is-a-set-of
  14. https://www.studocu.com/in/document/national-institute-of-electronics-information-technology/basic-computer-course/wifi-questions/114612433
  15. https://www.sanfoundry.com/computer-networks-questions-answers-wireless-lan/
  16. https://www.geeksforgeeks.org/computer-organization-architecture/ieee-802-11-architecture/
  17. https://www.watelectronics.com/mcq/wireless-local-area-network/
  18. https://gtu-mcq.com/BE/Computer-Engineering/Semester-7/2170710/2533/MCQs?q=9aZHDjblmRk%3D
  19. https://www.scribd.com/document/462112424/UNIT4-WCN-MCQS
  20. https://testbook.com/objective-questions/mcq-on-ieee-802-11–5eea6a0939140f30f369d904

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