MCQs

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1. Which command displays statistics for all configured network interfaces on a Cisco router?
   a. show running-config
   b. show version
   c. show interfaces
   d. show ip route
   Answer: c. show interfacescisco
2. What status indicates that an interface is ready to send and receive traffic?
   a. Down
   b. Shut
   c. Up/Up
   d. Blocked
   Answer: c. Up/Upnetworklessons
3. Which output field shows the speed of an interface?
   a. MTU
   b. Bandwidth
   c. Duplex
   d. MAC address
   Answer: b. Bandwidthnetworklessons
4. The command used to check status and errors on FastEthernet0/0 is:
   a. show ip interface brief
   b. show interface FastEthernet0/0
   c. show running-config
   d. show startup-config
   Answer: b. show interface FastEthernet0/0networklessons
5. What does the “Hardware is …” line show in “show interface” output?
   a. Protocol type
   b. Interface physical type
   c. Memory type
   d. IP address
   Answer: b. Interface physical typenetworklessons
6. Which metric is not shown by the show interfaces command?
   a. Input errors
   b. Output errors
   c. Usernames
   d. MTU size
   Answer: c. Usernamesnetworklessons
7. The “line protocol is up” phrase means:
   a. The interface is disabled
   b. Layer 2 is functional
   c. No traffic can flow
   d. Interface is administratively shut down
   Answer: b. Layer 2 is functionalnetworklessons
8. To check if an interface is administratively shut down, look for:
   a. Protocol status
   b. “Administratively down” status
   c. MAC address
   d. IP address
   Answer: b. “Administratively down” statusnetworklessons
9. Which field displays the unique identifier for an interface?
   a. IP address
   b. MAC address
   c. Bandwidth
   d. Protocol status
   Answer: b. MAC addressnetworklessons
10. What is the default MTU size for Ethernet interfaces on Cisco routers?
    a. 512 bytes
    b. 128 bytes
    c. 1500 bytes
    d. 4096 bytes
    Answer: c. 1500 bytesnetworklessons
11. “show interfaces” can help troubleshoot which issue?
    a. Password problems
    b. Connectivity and port errors
    c. DNS resolution failures
    d. NTP synchronization
    Answer: b. Connectivity and port errorsnetworkstraining
12. Where is the interface reliability metric shown?
    a. Output errors
    b. Reliability field
    c. Bandwidth field
    d. Protocol status
    Answer: b. Reliability fieldnetworklessons
13. A “Full-duplex” output indicates:
    a. Communication in one direction only
    b. Communication in both directions simultaneously
    c. Interface is down
    d. Protocol error
    Answer: b. Communication in both directions simultaneouslynetworklessons
14. Which field indicates ARP protocol type?
    a. Protocol status
    b. ARP type
    c. Bandwidth
    d. Duplex
    Answer: b. ARP typenetworklessons
15. What does “Last input never” in show interface mean?
    a. Interface never received traffic
    b. Interface is always active
    c. Interface MAC is missing
    d. Routing protocol is down
    Answer: a. Interface never received trafficnetworklessons
16. What does the “Input queue” field monitor?
    a. Incoming packets waiting to be processed
    b. Output packets
    c. IP address assignments
    d. Reliability statistics
    Answer: a. Incoming packets waiting to be processednetworklessons
17. Which Cisco command summarizes all interface statuses briefly?
    a. show interfaces summary
    b. show ip route
    c. show ip interface brief
    d. show protocols
    Answer: c. show ip interface briefnetworklessons
18. To view error counters per interface, use:
    a. show ip route
    b. show running-config
    c. show interfaces
    d. show hostname
    Answer: c. show interfacesciscozine
19. Duplex mismatches can be detected using:
    a. show ip route
    b. show interfaces
    c. show startup-config
    d. show hosts
    Answer: b. show interfacesciscozine
20. What value shows how loaded the interface is?
    a. MTU
    b. txload/rxload
    c. IP Address
    d. Status
    Answer: b. txload/rxloadnetworklessons
21. The “Encapsulation” field in “show interface” output tells:
    a. IP address type
    b. Data link framing method used
    c. Duplex mode
    d. Bandwidth setting
    Answer: b. Data link framing method usednetworklessons
22. What does “Total output drops” mean?
    a. All packets are received
    b. Packets were dropped during transmission
    c. No errors reported
    d. MAC address not known
    Answer: b. Packets were dropped during transmissionnetworklessons
23. Admin wants to see status of all interfaces. Which command?
    a. show interface
    b. show run
    c. ipconfig
    d. reload
    Answer: a. show interfacecisco
24. Which field displays the physical address of the interface?
    a. Protocol status
    b. Hardware address
    c. Bandwidth
    d. Reliability
    Answer: b. Hardware addressnetworklessons
25. “Output hang never” in show interfaces means:
    a. Output traffic was never delayed
    b. Interface is down
    c. Reliability is low
    d. For VLANs only
    Answer: a. Output traffic was never delayednetworklessons
26. To check which packets were switched at Layer 2, use:
    a. show vlan
    b. show interface
    c. show version
    d. show hosts
    Answer: b. show interfaceciscozine
27. “Input errors” line displays:
    a. Number of successful incoming packets
    b. Number of incoming packets with errors
    c. Types of errors on outgoing packets
    d. Interface admin status
    Answer: b. Number of incoming packets with errorsnetworklessons
28. Which field reveals queue strategy used on output?
    a. MAC address
    b. Protocol status
    c. Output queue: strategy
    d. Duplex
    Answer: c. Output queue: strategynetworklessons
29. The command “show interface vlan 1” shows statistics for:
    a. Physical interface only
    b. Serial interface only
    c. VLAN 1 interface
    d. Loopback only
    Answer: c. VLAN 1 interfaceciscozine
30. What indicates when interface counters were last cleared?
    a. Last input field
    b. Last clearing of counters
    c. Protocol status
    d. Reliability field
    Answer: b. Last clearing of countersnetworklessons
31. “show interface” command on VLAN shows counters for?
    a. Layer 3 processed packets
    b. Layer 2 only
    c. Shutdown interfaces
    d. MAC address only
    Answer: a. Layer 3 processed packetsciscozine
32. MTU stands for:
    a. Maximum Transmission Unit
    b. Maximum Traffic Utility
    c. Media Type Used
    d. Management Type Utility
    Answer: a. Maximum Transmission Unitincludehelp
33. To view interface description, use:
    a. show interfaces description
    b. show ip route
    c. show run
    d. show host
    Answer: a. show interfaces descriptiontechdocs.audiocodes
34. Errors on transmitted packets shown by:
    a. tx_errors field
    b. rx_packets field
    c. MTU field
    d. Bandwidth field
    Answer: a. tx_errors fieldtechdocs.audiocodes
35. “show interface” output includes statistics like:
    a. Uptime, dropped packets, collisions
    b. Only IP addresses
    c. System log data
    d. VLAN information only
    Answer: a. Uptime, dropped packets, collisionstechdocs.audiocodes
36. Which layer does “line protocol” indicate status for?
    a. Layer 1 Physical
    b. Layer 2 Data Link
    c. Layer 3 Network
    d. Layer 4 Transport
    Answer: b. Layer 2 Data Linknetworklessons
37. Input queue drops signal:
    a. Output errors
    b. Dropped incoming packets due to congestion
    c. No errors
    d. MTU mismatches
    Answer: b. Dropped incoming packets due to congestionnetworklessons
38. “show interface” displays which counters for VLANs?
    a. All packets on the physical interface
    b. Only CPU processed packets
    c. All output traffic
    d. Only errors
    Answer: b. Only CPU processed packetsciscozine
39. How can you verify port speed?
    a. Status line
    b. Bandwidth field
    c. Protocol status
    d. IP address
    Answer: b. Bandwidth fieldnetworklessons
40. Encapsulation ARPA means:
    a. Interface runs IPX
    b. Standard Ethernet framing used
    c. Serial communication in use
    d. Ports are disabled
    Answer: b. Standard Ethernet framing usednetworklessons
41. “show interface” command works on:
    a. Only switches
    b. Only routers
    c. Both routers and switches
    d. Only firewalls
    Answer: c. Both routers and switchesnetworkstraining
42. Which field displays time since counters were cleared?
    a. Last input
    b. Last clearing of counters
    c. Duplex mode
    d. Queue length
    Answer: b. Last clearing of countersnetworklessons
43. A duplex mismatch may cause:
    a. MAC address confusion
    b. Increased collision and errors
    c. Higher MTU
    d. Protocol status up
    Answer: b. Increased collision and errorsciscozine
44. Which field states ARP timeout value?
    a. Bandwidth
    b. ARP Timeout
    c. MTU
    d. Output queue
    Answer: b. ARP Timeoutnetworklessons
45. Reliable interface should display:
    a. Reliability 255/255
    b. MTU 128
    c. Line protocol down
    d. Output hang
    Answer: a. Reliability 255/255networklessons
46. What does the “rx_packets” counter show?
    a. Outgoing packets
    b. Incoming packets received
    c. Collisions
    d. VLAN status
    Answer: b. Incoming packets receivedtechdocs.audiocodes
47. “tx_packets” counter shows:
    a. Packets sent out
    b. Errors reported
    c. Layer 2 only traffic
    d. MAC address
    Answer: a. Packets sent outtechdocs.audiocodes
48. How do you check VLAN interface statistics?
    a. show interface vlan n
    b. show ip route
    c. show mac-address-table
    d. show run
    Answer: a. show interface vlan nciscozine
49. Which output shows input packet rate?
    a. 5 minute input rate field
    b. MAC address field
    c. Reliability field
    d. Line protocol field
    Answer: a. 5 minute input rate fieldnetworklessons
50. If output queue drops are high, which command helps you diagnose?
    a. show interface
    b. show run
    c. show version
    d. copy tftp flash
    Answer: a. show interfacenetworklessons

1. https://www.cisco.com/E-Learning/bulk/public/tac/cim/cib/using_cisco_ios_software/cmdrefs/show_interfaces.htm
2. https://networklessons.com/cisco/ccnp-tshoot/cisco-ios-show-interface-explained
3. https://www.networkstraining.com/cisco-show-interface-command/
4. https://www.ciscozine.com/show-interface-in-depth/
5. https://www.includehelp.com/linux/network-commands-aptitude-questions-and-answers.aspx
6. https://techdocs.audiocodes.com/session-border-controller-sbc/command-line-interface/version-760/Content/CLI/show%20network%20interface.htm
7. https://examradar.com/basics-of-user-interfaces-command-line-interface-cli-and-graphical-user-interface-gui-mcqs/
8. https://testbook.com/objective-questions/mcq-on-interface-commands–5eea6a0a39140f30f369dae5
9. https://www.sanfoundry.com/software-engg-mcqs-user-interface-design/
10. https://www.scribd.com/document/229341388/Operating-System-MCQ-S
11. https://itexamanswers.net/10-4-3-the-cisco-ios-command-line-quiz-answers.html
12. https://www.sanfoundry.com/1000-unix-questions-answers/
13. https://www.computernetworkingnotes.com/ccna-study-guide/cisco-router-show-command-explained-with-examples.html
14. https://learningnetwork.cisco.com/s/question/0D53i00000Kt6krCAB/help-needed-to-interpret-show-interface-output
15. https://www.placementpreparation.io/mcq/linux/
16. https://labex.io/tutorials/linux-how-to-interpret-network-interface-output-438374
17. https://testbook.com/objective-questions/mcq-on-io-interface–5eea6a0a39140f30f369dadc
18. https://study-ccna.com/show-interfaces-status-command/
19. https://www.reddit.com/r/ccna/comments/183epph/where_can_i_find_info_on_understanding_every_line/
20. https://www.examtray.com/java-questions/java-interface-interview-mcq-questions-and-answers