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Switch Questions

November 20th, 2018 Go to comments

Quick review of switch function:

In brief, the basic switching function at Layer 2 adheres to these rules for determining forwarding responsibility:
+ If the destination MAC address is found in the CAM table, the switch sends the frame out the port that is associated with that destination MAC address in the CAM table. This process is called forwarding.
+ If the associated port to send the frame out is the same port that the frame originally came in on, there is no need to send the frame back out that same port, and the frame is ignored. This process is called filtering.
+ If the destination MAC address is not in the CAM table (that is, unknown unicast), the switch sends the frame out all other ports that are in the same VLAN as the received frame. This is called flooding. It does not flood the frame out the same port on which the frame was received.
+ If the destination MAC address of the received frame is the broadcast address (FFFF.FFFF.FFFF), the frame is sent out all ports that are in the same VLAN as the received frame. This is also called flooding. The only exception is the frame is not sent out the same port on which the frame was received.

Reference: http://www.ciscopress.com/articles/article.asp?p=2348264

Question 1


In cut-through switching, the switch copies into its memory only the destination MAC address (first six bytes of the frame) of the frame. After processing these first six bytes, the switch had enough information to make a forwarding decision and move the frame to the appropriate switchport. This switching method is faster than store-and-forward switching method.

In store-and-forward switching, the switch copies each complete Ethernet frame into the switch memory and computes a Cyclic Redundancy Check (CRC) for errors. If a CRC error is found, the Ethernet frame is dropped. If no CRC error is found then that frame is forwarded.

Question 2


From the output we notice that the administrator has just shut down Interface Vlan1, which is the default VLAN so no one can access it remotely (like telnet) -> B is correct.

Answer A is not correct as STP calculation does not depend on which port comes up first or last. STP recalculates when there is a change in the network.

A normal switch can operate without VLAN -> C is not correct.

This IOS does support VLAN because it has VLAN 1 on it -> D is not correct.

Question 3


Host A ( and the management IP address of the Switch ( are in the same subnet so telnet from host A to the switch can be successful even if a default gateway is not set on host A.

But host B ( and the management IP address of the Switch ( are not in the same subnet. Therefore packets from host B must reach the router Fa0/0.32 interface before forwarding to the switch. But when the switch replies, it does not know how to send packets so an appropriate default gateway must be assigned on the switch (to Fa0/0.32 –

Answer A is not correct because even when host B & the switch are in the same subnet, they cannot communicate because of different VLANs.

Answer C is not correct as host B can ping other two hosts.

Answer D is not correct because host B always belongs to VLAN 32 so assigning an IP address in VLAN 1 does not solve the problem.

Question 4

Question 5

Question 6


In the configuration above, the “no shutdown” command was missing so interface Vlan 1 is still inactive. Notice that only the loopback command does not need the “no shutdown” command to work.

Question 7


A VLAN does not need to be assigned to any port -> B is not correct.

An access port can only receive traffic from one VLAN -> C is not correct.

If not assigned to a specific VLAN, an access port carries traffic for VLAN 1 by default -> D is not correct.

An access port will drop packets with 802.1Q tags -> A is correct. Notice that 802.1Q tags are used to packets moving on trunk links.

Question 8


Carrier Sense Multiple Access with Collision Detection (CSMA/CD) is the LAN access method used in Ethernet. When a device wants to gain access to the network, it checks to see if the network is free. If the network is not free, the device waits a random amount of time before retrying. If the network is free and two devices access the line at exactly the same time, their signals collide. When the collision is detected, they both back off and wait a random amount of time before retrying.

CSMA/CD is used with devices operating in half-duplex mode only. CSMA/CD helps devices connecting to half-duplex switch ports operate correctly.

Question 9


The “!” is a special character which is not allowed in the hostname of Cisco device.

Question 10

Question 11


All ports on a Layer 2 switch are in the same broadcast domain. Only router ports separate broadcast domains.

Comments (30) Comments
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  1. Manan
    February 23rd, 2017

    question no 13:

    SwitchB(config)#ip default-gateway
    SwitchB(config)#interface vlan 1
    SwitchB(config-if)#ip address
    SwitchB(config-if)#no shutdown

    SwitchB(config)#ip default-network
    SwitchB(config)#interface vlan 1
    SwitchB(config-if)#ip address
    SwitchB(config-if)#no shutdown
    I do not find out any different between B & D. But answer is B . Could you explain ?

  2. djkey
    February 25th, 2017

    Answer D has the command SwitchB(config)#ip default-network in the command string. ip default-network is not a valid command for setting the default gateway on a switch

  3. Pindan
    February 25th, 2017

    Q3 the multiple choice answer is correct but your explanation talks about host B default gateway. The actual explanation should be for the switches default gateway to be set not the host B.
    Switch default gateway should be

    Please correct or advise.

  4. Pindan
    February 25th, 2017

    Typo for above q3 comment. Correction switch default gateway

  5. Anonymous
    March 5th, 2017

    why the questions are not written ?

  6. me
    March 31st, 2017

    type of device replaced by subinterface for vlan routing???
    A.layer 3 switch
    C. router
    plz answer me

  7. Sam
    April 1st, 2017

    Its really annoying that the question are not written. Very disappointed….

  8. qasi
    April 6th, 2017

    PLZ VISIT THIS SIDE FOR QUESTIONS http://congressreiki.ranm.org/?all=vlan-questions

  9. Anonymous
    April 8th, 2017

    You have to pay to see full questions and tutorials, without payment you can’t get full access.

  10. mikiko
    April 18th, 2017


  11. Rahul
    May 4th, 2017

    http://networkerinterview.net is the best website i have found for CCNA, CCNP & CCIE interview questions

  12. nick
    May 8th, 2017

    Question #9
    Should ask which is valid. Hostnames must start with a letter and end with a letter or number. They may contain a hyphen but not start or end with one. No other characters allowed. So the only valid hostname is D.

  13. GMPP
    May 10th, 2017

    Where can I find the questions?

  14. missmurder
    May 12th, 2017

    Guys, I need a hand on this question:

    Which interface counter can you use to diagnose a duplex mismatch problem?

    A. no carrier
    B. late collisions
    C. giants
    D. CRC errors
    E. deferred
    F. runts

    Answer: B

    Many dumps say it’s late collisions but I’m pretty sure it’s CRC errors. Can someone confirm this and why??? Thanks!

  15. CCNAgeek
    May 28th, 2017

    yes, it is CRC errors, late collisions are from a cable that is too long, google it to confirm.

  16. Anonymous
    June 4th, 2017

    Iin a duplex mismatch the collisions seen on the half-duplex side of the link are often LATE COLLISIONS. The full-duplex side usually will register FCS (frame check sequence) errors, or RUNTS

  17. Brock
    June 13th, 2017
  18. Hiram
    June 19th, 2017

    Passed with the 747q dumps, all questions were from there.

  19. Minh
    June 19th, 2017

    Dose anyone have the full version for this dumps?https://drive.google.com/open?id=0B5mAFqgydmCzc3BmR214LWFuTDg

  20. Blue_line
    July 14th, 2017

    Ref: Q3

    If you want to access telnet from PC-B, you have to have default gateway-gate
    on the PC-A as and on PC-B…not on the switch.

    If you provide default-gateway or on the switch it won’t work.

    If you provide default-gateway only on the PC-B, packet will go to the PC-A but it (PC-A) wont be able to reply since it don’t have a default-gateway, it wouldn’t know where to go.

    The way Question and choice for the answers is laid out; answer will be A. Please comment if you have different opinion.

  21. Blue_line
    July 16th, 2017

    Ref: Q3 Correction on my previous comments

    For telnet connection you do require to setup a default gateway (e.g., i configured with on the switch and also require to setup default gateway on the PC-A, PC-B and PC-C (as,

    If you check “Port Security Questions” section, Q2 will be more clear

  22. Haris
    July 18th, 2017

    Passed 8xx,
    A few new questions but it’s still very easy to pass. Only got 8xx is due to my laziness.
    Practice the labs and practice again, labs weight a lot on the score.
    I used the it-libraries dumps for the questions, labs are explained to but without hands on it’s hard to rely on them.

  23. idiott
    July 19th, 2017


    Pls share the dumps aktparthiban 2 gmail. com

  24. idiott
    July 19th, 2017

    Pls share the dumps aktparthiban @ gmail. com

  25. Anonymous
    July 21st, 2017

    Please share the dumps highgroundz @ gmail . com

  26. mahmoud
    August 24th, 2017

    i need dumps for ccnp switching

  27. mahmoud
    August 24th, 2017

    i need duumps for ccnp switching if there have it please send me mahmoud.altigani14 @ gmail .com

  28. Aung Kyi Lwin
    September 11th, 2017

    I can’t see question. Just answer. Why?

  29. Dina
    October 31st, 2017

    could you please send me the link of latest dump that is still working?

  30. Anonymous
    November 1st, 2017

    why questions are not available ???

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