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1. Which function best describes a cable modem in a home network?
   a. Data encryption
   b. Connecting to ISP via coaxial cable
   c. Switching Ethernet frames
   d. DHCP address allocation
   Answer: bhitrontech
2. What physical cable does a cable modem typically use for its main WAN connection?
   a. Fiber optic
   b. Coaxial
   c. Twisted pair
   d. USB
   Answer: blenovo+1
3. What is the primary international standard for cable modem operation?
   a. TCP/IP
   b. DOCSIS
   c. PPPoE
   d. ATM
   Answer: bidc-online+2
4. Which layer does a cable modem operate at when modulating and demodulating signals?
   a. Physical
   b. Network
   c. Application
   d. Presentation
   Answer: aasianetbroadband
5. The most recent DOCSIS version enabling gigabit speeds is:
   a. DOCSIS 2.0
   b. DOCSIS 3.0
   c. DOCSIS 3.1
   d. DOCSIS 1.1
   Answer: cavsystem+1
6. What main protocol do cable modems use for device configuration?
   a. SNMP
   b. DHCP
   c. UDP
   d. ARP
   Answer: bwikipedia
7. Cable modems that also include router functionality are often called:
   a. Switches
   b. Gateways
   c. Repeaters
   d. Bridges
   Answer: bhitrontech+1
8. How does a cable modem connect a user’s LAN to the ISP?
   a. Wi-Fi signal
   b. POWERline adapter
   c. Coaxial to WAN, Ethernet to LAN
   d. Phone line
   Answer: casianetbroadband+1
9. Which device in the cable network does a cable modem authenticate with to access the Internet?
   a. Firewall
   b. CMTS (Cable Modem Termination System)
   c. ISP core switch
   d. Router
   Answer: bcablelabs+1
10. Which frequency range is commonly used for downstream data in DOCSIS 1.0?
    a. 5–30 MHz
    b. 50–750 MHz
    c. 750–1000 MHz
    d. 1000–1500 MHz
    Answer: bidc-online
11. Cable modem bridges are defined under which IEEE standard?
    a. IEEE 802.1D
    b. IEEE 802.11
    c. IEEE 802.3
    d. IEEE 802.16
    Answer: awikipedia
12. Which security feature encrypts all traffic between a cable modem and CMTS?
    a. WPA2
    b. BPI (Baseline Privacy Interface)
    c. WEP
    d. S/MIME
    Answer: bgarykessler+1
13. A cable modem’s LAN side typically supports which common interface?
    a. SCSI
    b. USB
    c. Ethernet
    d. HDMI
    Answer: clenovo+1
14. With DOCSIS 3.1, what encryption standard is commonly used for device communications?
    a. DES
    b. RSA 2048-bit
    c. MD5
    d. AES 128-bit
    Answer: bcablelabs
15. Which protocol is most commonly used for cable modem remote management?
    a. FTP
    b. TFTP
    c. SNMP
    d. HTTP
    Answer: cetsi+1
16. What happens if a cable modem digital certificate is compromised?
    a. Device slows down
    b. Certificate is revoked; device denied network access
    c. Device switches protocol
    d. Device receives firmware update
    Answer: bcablelabs+1
17. Which device divides upstream and downstream channels for multiple cable modems?
    a. Switch
    b. CMTS
    c. Router
    d. Modem rack
    Answer: bidc-online
18. The main difference between a cable modem and DSL modem is:
    a. Cable modems use coaxial, DSL uses twisted pair
    b. Cable uses optical fiber, DSL uses coaxial
    c. DSL is faster than cable
    d. Cable modems work only for TV services
    Answer: ahitrontech+1
19. Which is NOT true of cable modem Internet access?
    a. It can be a shared broadcast medium
    b. Provides high bandwidth over coaxial
    c. Each modem has a dedicated channel
    d. Supports bidirectional traffic
    Answer: csanfoundry
20. What is the function of a cable modem termination system (CMTS)?
    a. Encrypts WLAN traffic
    b. Interfaces cable modems with the provider’s backbone network
    c. Provides DNS lookup
    d. Routes IP packets over LAN
    Answer: bcablelabs+1
21. Which DOCSIS version first introduced improved security features and quality of service?
    a. DOCSIS 1.0
    b. DOCSIS 1.1
    c. DOCSIS 2.0
    d. DOCSIS 3.0
    Answer: bidc-online
22. How are software updates secured in modern cable modems?
    a. Password protection
    b. Code verification certificates (CVCs)
    c. Username and password
    d. MAC filtering
    Answer: bcablelabs
23. What is typically the maximum upload rate for DOCSIS 1.0?
    a. 2.5 Mbps
    b. 10 Mbps
    c. 32 Mbps
    d. 100 Mbps
    Answer: bidc-online
24. Where does a cable modem’s IP address reside for management?
    a. LAN side device
    b. Modem itself
    c. ISP router
    d. DHCP server
    Answer: bwikipedia+1
25. Which protocol is often used for firmware upgrades in cable modems?
    a. HTTP
    b. TFTP
    c. SMTP
    d. SFTP
    Answer: bwikipedia
26. A cable modem’s MAC address is used for:
    a. Encrypting data packets
    b. Identifying device on LAN & WAN
    c. Assigning public IP
    d. Enabling Wi-Fi signal
    Answer: basianetbroadband
27. What describes the role of digital certificates in cable modem security?
    a. Certificates are used for SSL websites only
    b. Identify and authenticate modems securely
    c. Encrypt all user traffic
    d. Enable Wi-Fi direct
    Answer: bcablelabs+1
28. Which acronym stands for the architecture combining optical fiber and coaxial cable in cable networks?
    a. FTTC
    b. HFC (Hybrid Fiber-Coaxial)
    c. FTTB
    d. FTTH
    Answer: bwikipedia+1
29. DOCSIS defines:
    a. Modulation methods for DSL
    b. High-speed data interface for cable TV networks
    c. Encryption schemes for fiber optics
    d. Broadcast frequency allocation
    Answer: bwikipedia+1
30. Which basic troubleshooting step is recommended first for a cable modem not connecting?
    a. Reset modem remotely
    b. Examine physical cable connections
    c. Check email configuration
    d. Run virus scan
    Answer: bitexamanswers
31. What role does SNMP play in cable modem management?
    a. Provides email capability
    b. Permits remote monitoring and configuration
    c. Allows gaming prioritization
    d. Enables mobile connectivity
    Answer: betsi+1
32. Which element gives each cable modem a unique digital identity?
    a. MAC address only
    b. Digital certificate
    c. Username setup
    d. IP subnet mask
    Answer: bcablelabs+1
33. If multiple users download heavily on the same neighborhood cable segment, what typically happens?
    a. All users maintain maximum speeds
    b. Overall speeds may decrease
    c. Segment switches to DSL
    d. Segment blocks all traffic
    Answer: bwikipedia+1
34. Cable modem routers combine:
    a. Routing and VPN solutions
    b. Modem and router functions in one device
    c. Switch and firewall in one device
    d. Wireless and Bluetooth signals
    Answer: bhitrontech+1
35. Residential cable gateways must comply with which main DOCSIS standard version for gigabit services as of 2025?
    a. DOCSIS 2.0
    b. DOCSIS 3.1
    c. DOCSIS 4.0
    d. DOCSIS 1.1
    Answer: bavsystem+2
36. What main feature does BPI security bring to cable modems?
    a. Checks IP conflicts
    b. Encrypts transmissions between modem and CMTS
    c. Enables multiple Wi-Fi profiles
    d. Boosts physical signal strength
    Answer: bgarykessler+1
37. The upstream frequency for DOCSIS 1.0 is in what range?
    a. 5–42 MHz
    b. 50–700 MHz
    c. 200–900 MHz
    d. 1000–1500 MHz
    Answer: aidc-online
38. A stand-alone cable modem typically lacks:
    a. Ethernet ports
    b. DHCP functionality
    c. Wi-Fi capability
    d. Coaxial connection
    Answer: casianetbroadband
39. Which of these is NOT a typical component of a cable modem network?
    a. CMTS
    b. Switch
    c. HFC cable plant
    d. Fiber backbone
    Answer: bwikipedia+1
40. DOCSIS 4.0 enhances what aspect compared to older versions?
    a. Lower frequencies
    b. Multigigabit throughput & security
    c. Reduced management
    d. No support for IPv6
    Answer: betsi+1
41. Which object does SNMP manage in DOCSIS 4.0 CCAP?
    a. Switches only
    b. Management objects for CMTS and universal EQAMs
    c. Only modems
    d. Routers exclusively
    Answer: betsi
42. Which troubleshooting approach starts at the physical cable connections?
    a. Top-down
    b. Bottom-up
    c. Divide and conquer
    d. Substitution
    Answer: bitexamanswers
43. Cable modem’s primary function in a network topology is as a:
    a. Network hub
    b. Network bridge
    c. VPN server
    d. Firewall
    Answer: basianetbroadband+1
44. An ISP issues cable modems to customers because:
    a. Modem is part of the network authentication
    b. Modem provides TV broadcast only
    c. Modem is required for wireless LAN
    d. Modem stores customer billing data
    Answer: acablelabs+1
45. Which protocol helps cable modems fetch configuration files on boot?
    a. DHCP
    b. TFTP
    c. SMTP
    d. FTP
    Answer: bwikipedia
46. Which feature separates a residential gateway from a stand-alone modem?
    a. Gateway integrates modem and router
    b. Gateway offers only Wi-Fi
    c. Gateway does not use coaxial cable
    d. Gateway lacks LAN connectivity
    Answer: ahitrontech+1
47. What acronym stands for the SNMP management interface in DOCSIS 4.0?
    a. SMPS
    b. CCAP
    c. CMTS
    d. EQAM
    Answer: betsi
48. Cable modem security is enhanced by:
    a. Regular speed tests
    b. Strong password on Wi-Fi
    c. PKI-based authentication and encrypted transmission
    d. Static IP allocation only
    Answer: ccablelabs+1
49. To support multiple household devices simultaneously, cable modems often need:
    a. Multiple coaxial ports
    b. Integrated router or gateway
    c. Optical splitter
    d. T-carrier uplinks
    Answer: bhitrontech+1
50. The key reason actual cable modem download speed is often less than the theoretical maximum is:
    a. ISP uplink bottleneck
    b. Outdated device firmware
    c. Coaxial cable aging
    d. Overheating device
    Answer: aasianetbroadband

1. https://www.hitrontech.com/learn/cable-modem-gateway-introdouction/
2. https://www.lenovo.com/in/en/glossary/cable-modem/
3. https://www.idc-online.com/technical_references/pdfs/data_communications/DOCSIS.pdf
4. https://en.wikipedia.org/wiki/DOCSIS
5. https://avsystem.com/blog/csp/docsis
6. https://asianetbroadband.in/what-is-a-cable-modem/
7. https://en.wikipedia.org/wiki/Cable_modem
8. https://www.cablelabs.com/insights/securing-networks-broadband-age
9. https://www.garykessler.net/library/cm_security.html
10. https://www.etsi.org/deliver/etsi_es/203800_203899/20381101/01.01.01_60/es_20381101v010101p.pdf
11. https://www.cablelabs.com/blog/how-cable-networks-secure-communications
12. https://www.sanfoundry.com/computer-networks-mcqs-access-networks/
13. https://itexamanswers.net/module-8-6-3-troubleshoot-common-network-problems-quiz-answers.html
14. https://morefield.com/blog/guide-to-cable-modems/
15. https://www.geeksforgeeks.org/computer-networks/what-is-modem/
16. https://www.tutorialspoint.com/cable-modems
17. https://www.proprofsflashcards.com/story.php?title=there-is-even-more-iii
18. https://www.netgear.com/hub/network/security/secure-your-router/
19. https://perswww.kuleuven.be/~u0068190/Onderwijs/Extra_info/Cable%20modem.pdf
20. https://examradar.com/basic-computer-troubleshooting-mcqs/