🔧 Cisco Hardware & Components - CCT Practice Questions

Identify Cisco router and switch hardware: modules, interfaces, power supplies, fans, LEDs, and how to perform physical hardware troubleshooting and RMA.

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CCT Hardware Question Bank (22 Questions)

Browse all 22 practice questions covering Cisco Hardware & Components for the CCT certification exam. Each question includes the full answer and a detailed explanation to help you understand the concepts.

  1. Question 1Cisco Equipment and Related Hardware

    What does a solid green System LED on a Cisco Catalyst switch indicate?

    ASystem error
    BThe system is operating normally✓
    CThe system is in ROMmon mode
    DPower failure
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Solid green System LED = normal operation. Amber = POST failure or system error. Off = no power. Blinking green = boot in progress. Understanding LED indicators is essential for hardware troubleshooting.

  2. Question 2Cisco Equipment and Related Hardware

    What is a SFP (Small Form-factor Pluggable) module used for?

    AProviding wireless connectivity
    BA hot-swappable transceiver that converts electrical signals to optical (fiber) or copper signals for network connectivity✓
    CStoring the IOS image
    DProviding power to IP phones
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    SFP modules are hot-swappable transceivers that plug into switch/router ports. They support various media types (multimode fiber, single-mode fiber, copper) and speeds (1G SFP, 10G SFP+, 25G SFP28). They enable flexible port configuration.

  3. Question 3Cisco Equipment and Related Hardware Topics

    When replacing a failed power supply in a Cisco Catalyst 9300, which type of replacement does the switch support?

    ACold swap only (power off required)
    BHot swap (no power interruption)✓
    CRequires full chassis replacement
    DSoftware-initiated swap only
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Cisco Catalyst 9300 switches support hot-swappable power supplies, allowing replacement without powering down the switch or disrupting network traffic.

  4. Question 4Cisco Equipment and Related Hardware Topics

    What should a field technician verify FIRST before replacing a Cisco SFP module in a production switch?

    ASoftware compatibility of the SFP
    BThe replacement SFP is from the same vendor batch
    CTraffic has been migrated away from the port✓
    DThe switch is running the latest IOS
    Show Answer & Explanation
    Correct Answer: C
    Explanation:

    Before replacing an SFP, traffic should be migrated to avoid disruption. Then verify compatibility (Cisco-branded or compatible), proper type (SR/LR), and correct speed for the port.

  5. Question 5Cisco Equipment and Related Hardware

    What is the function of a transceiver module (SFP) in a Cisco switch?

    APower supply
    BConverts electrical signals to optical signals for fiber connections✓
    CRouting packets
    DEncrypting traffic
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    SFP (Small Form-factor Pluggable) transceivers convert electrical signals to optical signals, enabling fiber optic connectivity on Cisco switches and routers.

  6. Question 6Cisco Equipment and Related Hardware

    What is the purpose of a network module or line card in a modular Cisco router?

    ATo store the IOS image
    BTo add additional interface types (WAN, LAN, voice) and expand the router's port capacity✓
    CTo provide UPS backup power
    DTo increase RAM capacity
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Network modules/line cards add interfaces to modular routers and switches: WAN cards (serial, T1/E1), LAN cards (additional Ethernet), service modules (firewall, VPN), and voice modules (FXO/FXS). They're hot-swappable on many platforms.

  7. Question 7Cisco Equipment and Related Hardware Topics

    What type of WAN connectivity do serial interfaces on Cisco routers provide?

    AWireless connectivity
    BPoint-to-point WAN connections using protocols like HDLC, PPP, or Frame Relay over leased lines or circuits✓
    CLAN connectivity
    DSAN connectivity
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Serial interfaces provide WAN connectivity using synchronous serial protocols. They connect to CSU/DSU devices for T1/E1 lines. Default encapsulation is HDLC (Cisco proprietary). PPP is the standard alternative. Frame Relay was used for older WANs.

  8. Question 8Cisco Equipment and Related Hardware

    Which LED color on a Cisco switch typically indicates the device is operating normally?

    ARed
    BAmber
    CGreen✓
    DOff
    Show Answer & Explanation
    Correct Answer: C
    Explanation:

    A green LED on a Cisco switch indicates normal operation. Amber indicates a fault, and red typically indicates a critical failure or RPS issue.

  9. Question 9Service-Related Knowledge

    What information does 'show ip interface brief' display?

    ADetailed interface statistics
    BA summary of all interfaces showing IP address, status (up/down), and protocol status in a compact table✓
    CRouting table entries
    DARP table entries
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    'show ip interface brief' provides a quick summary table: Interface name, IP address (or unassigned), OK? (config validity), Method (DHCP/manual), Status (admin up/down), Protocol (line protocol up/down). Essential for quick health checks.

  10. Question 10Cisco Equipment and Related Hardware

    What happens when a fan tray fails in a Cisco switch or router?

    ANothing — fans are optional
    BThe device generates alarms, may reduce power/speed, and can shut down to prevent heat damage if cooling is insufficient✓
    CThe device automatically switches to liquid cooling
    DThe device continues normal operation indefinitely
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Fan failure triggers syslog alerts and SNMP traps. The device may reduce port speeds or shut down modules to lower heat output. Prolonged fan failure leads to overheating and automatic shutdown to protect components. Replace failed fans immediately.

  11. Question 11Cisco Equipment and Related Hardware

    What is the purpose of the RPS (Redundant Power Supply) port on a Cisco switch?

    ANetwork connectivity
    BProvides backup power from an external power supply if the internal PSU fails✓
    CConsole access
    DStacking switches
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    The RPS port connects to an external redundant power supply that automatically takes over if the switch's internal power supply fails, ensuring continuous operation.

  12. Question 12Cisco IOS Software Operation

    What does the 'show interfaces status' command display on a switch?

    AIP routing table
    BPort status, VLAN assignment, duplex, speed, and type for all interfaces✓
    CARP table
    DRunning configuration
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    'show interfaces status' provides a summary table of all switch ports showing connected/notconnect status, VLAN assignment, duplex, speed, and interface type.

  13. Question 13Troubleshooting

    How do you identify interface errors on a Cisco switch?

    Ashow vlan brief
    BUse 'show interfaces' to view CRC errors, runts, giants, input/output errors, and collision counters✓
    Cshow mac address-table
    Dshow spanning-tree
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    'show interfaces' displays detailed counters: CRC errors (cable/NIC issues), runts (undersized frames), giants (oversized frames), collisions, and input/output error counts for troubleshooting.

  14. Question 14Cisco Equipment and Related Hardware Topics

    Which fiber optic connector type is most commonly used with Cisco SFP modules?

    AST (Bayonet)
    BLC (Lucent Connector) — small form factor duplex connector✓
    CSC (Subscriber Connector)
    DFC (Ferrule Connector)
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    LC connectors are the standard for SFP/SFP+ modules due to their small size (half the size of SC). They use a push-pull latching mechanism. SC connectors are larger and used with GBIC/older equipment. Both use ceramic ferrules for precise alignment.

  15. Question 15Cisco Equipment and Related Hardware

    What does a blinking amber LED on a Cisco switch port indicate?

    ANormal traffic flow
    BPort is administratively disabled
    CError condition or port fault✓
    DPoE device connected
    Show Answer & Explanation
    Correct Answer: C
    Explanation:

    A blinking amber LED indicates an error condition such as excessive errors, STP blocking, or a port security violation on that specific port.

  16. Question 16Cisco Equipment and Related Hardware Topics

    A field technician notices a Cisco switch port LED alternating between green and amber. What does this indicate?

    ANormal operation
    BLink fault or excessive errors✓
    CPoE negotiation in progress
    DSpeed mismatch
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    An alternating green/amber LED on a Cisco switch port indicates a link fault condition, which could be caused by excessive CRC errors, frame errors, or cabling issues.

  17. Question 17Service-Related Knowledge

    What is the recommended first troubleshooting step when a Cisco switch port is showing 'err-disabled' status?

    AReplace the cable
    BShut/no shut the interface
    CIdentify the cause using 'show errdisable recovery'✓
    DReload the switch
    Show Answer & Explanation
    Correct Answer: C
    Explanation:

    First identify why the port was err-disabled using 'show errdisable recovery' or 'show interface status err-disabled'. Common causes include BPDU guard, port security, or link-flap. Fix the root cause before re-enabling.

  18. Question 18Cisco Equipment and Related Hardware

    Which LED color on a Cisco switch port indicates an active link?

    ARed
    BAmber
    CGreen✓
    DBlue
    Show Answer & Explanation
    Correct Answer: C
    Explanation:

    A solid or blinking green LED on a Cisco switch port indicates an active, healthy link with traffic flowing.

  19. Question 19Cisco Equipment and Related Hardware

    What is the difference between SFP and SFP+ modules?

    ANo difference
    BSFP supports up to 1 Gbps; SFP+ supports up to 10 Gbps✓
    CSFP is for copper; SFP+ is for fiber only
    DSFP+ is older technology
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    SFP modules support speeds up to 1 Gbps, while SFP+ modules support up to 10 Gbps. SFP+ slots are backward compatible with SFP modules.

  20. Question 20Cisco Equipment and Related Hardware

    What does an amber LED on a Cisco switch port indicate?

    ANormal operation
    BA fault condition or the port is disabled/blocked by STP✓
    CMaximum speed reached
    DPoE is active
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    An amber LED indicates a problem: the port may be disabled administratively, blocked by Spanning Tree Protocol, or experiencing errors.

  21. Question 21Cisco Equipment and Related Hardware

    What does an amber system LED on a Cisco switch indicate?

    ANormal operation
    BA hardware fault or POST (Power-On Self-Test) failure requiring attention✓
    CPoE active
    DHigh CPU usage
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    An amber system LED indicates the switch failed POST or has a hardware issue. Green indicates normal operation. Blinking green means the switch is booting.

  22. Question 22Troubleshooting

    What does 'err-disabled' state on a switch port indicate?

    ANormal disabled state
    BThe port was automatically shut down due to a security or protocol violation (port-security, BPDU guard, etc.)✓
    CManual shutdown
    DCable disconnected
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Err-disabled means the switch automatically disabled the port due to a violation: port security, BPDU guard, loopback detection, or DHCP snooping. Use 'errdisable recovery' to auto-recover.

Key Hardware Concepts for CCT

hardwaremoduleinterfacepower supplyledrmarouterswitchsfp

CCT Hardware Exam Tips

Cisco Hardware & Components questions in CCT are typically scenario-based. Focus on service-level decision making aligned to official exam objectives. Priority concepts: hardware, module, interface, power supply, led, rma.

What CCT Expects

  • Anchor your answer in select the most practical, secure, and scalable answer for the stated scenario.
  • Hardware scenarios for CCT are frequently mapped to Domain 1 (35%), so read the objective carefully before picking controls or architecture.
  • Expect multi-service scenarios where Hardware interacts with IAM, networking, storage, or observability patterns rather than appearing as an isolated service question.
  • When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Entry) and managed-service best practices.

High-Value Hardware Concepts

  • Know the core Hardware building blocks cold: hardware, module, interface, power supply.
  • Review the edge-case features and limits for led, rma; these details are commonly used to differentiate answer choices.
  • Practice service-integration reasoning: how Hardware pairs with IOS Basics, Troubleshooting in real deployment patterns.
  • For CCT, explain why the chosen Hardware design meets reliability, security, and cost expectations better than the alternatives.

Common CCT Traps

  • Watch for answers that partially solve the requirement but miss operational constraints.
  • Questions in Cisco Equipment and Related Hardware often include distractors that look correct for Hardware but violate least-privilege, durability, or availability requirements.
  • Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
  • If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.

Fast Review Checklist

  • Can you compare at least two Hardware implementation paths and justify which one best fits the scenario?
  • Can you map the chosen answer back to Cisco Equipment and Related Hardware (35%) outcomes for CCT?
  • Can you explain security and access boundaries for Hardware without relying on default-open assumptions?
  • Can you describe how Hardware integrates with IOS Basics and Troubleshooting during failure, scaling, and monitoring events?

Exam Domains Covering Hardware

Domain 1Cisco Equipment and Related Hardware35%

Related Resources

🎯 Free CCT Mock Exam📝 IOS Basics Questions📝 Troubleshooting Questions

More CCT Study Resources

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