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ICND1 – Basic Questions

June 26th, 2017 in ICND1 100-105 Go to comments

Question 1


CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection. In an Ethernet LAN, before transmitting, a computer first listens to the network media. If the media is idle, the computer sends its data. If the media is not idle (another station is talking), the computer must wait for some time.

When a station transmits, the signal is referred to as a carrier. Carrier Sense means that before a station can send data onto an Ethernet wire, it have to listen to see if another “carrier” (of another station) is present. If another station is talking, this station will wait until there is no carrier present.

Multiple Access means that stations can access the network at any time. It is opposed to Token-Ring network where a station must have the “token” so that it can send data.

Although Carrier Sense help two stations not send data at the same time but sometimes two stations still send data at the same time! This is because two stations listen for network traffic, hear none, and transmit simultaneously -> a collision occurs and both stations must retransmit at some later time. Collision Detection is the ability of the media to detect collisions to know that they must retransmit.

Basically, the CSMA/CD algorithm can be summarized as follows:

+ A device that wants to send a frame must wait until the LAN is silent (no one is “talking”)
+ If a collision still occurs, the devices that caused the collision wait a random amount of time and then try to send data again.

Note: A switch separates each station into its own collision domain. It means that station can send data without worrying its data is collided with the data of other stations. It is as opposed to a hub which can cause collision between stations connected to it.

Question 2


Only two commands “show interfaces” and “show ip interface brief” reveal the status of router interfaces (up/up, for example).

The outputs of two commands are shown below:



Question 3


HTTP is based on TCP connection so a TCP connection must be established first between the workstation and the web server.

Question 4


Hubs do not separate collision domains so if hub is used in the topology above, we will have only 1 collision domain. Switches do separate collision domains so if hubs are replaced by switches, we would have 22 collision domains (19 collision domains for hosts and 3 collision domains among three switches. Please notice that the WAN (serial) connection is not counted as a collision (or broadcast) domain.

Question 5


A broadcast storm can cause congestion within a network. For more information about broadcast storm please read my STP tutorial.

Question 6


Before a host can send ICMP (ping) packets to another device, it needs to learn the MAC address of the destination device so it first sends out an ARP Request. In fact, the first ping packet is dropped because the router cannot create a complete packet without learning the destination MAC address.

Question 7


The “show running-config” command displays active configuration in memory.

Question 8

Question 9

Question 10


Full-duplex communication allows both sending and receiving of data simultaneously. Switches provide full-duplex communication capability. Half-duplex communication only allows data transmission in only one direction at a time (either sending or receiving).

Comments (54) Comments
Comment pages
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  1. Jerry
    March 9th, 2017

    Passed today, a few new questions.
    Used the 285 dump, 45/50 were cover in the dump.

    Good Luck all !

  2. Hey Jerry
    March 9th, 2017

    What is the 285 dump and where did you get it?

  3. Rob
    March 10th, 2017

    Everyone, please read this.

    I’m really sick of these test dump sites that charges you $50 for wrong answers! They all say β€œPass or money back” but if you read the fine print, that will never happen.

    So, I have compiled my test dump with the user ANSWERS to make 1 big document. You will see a lot of repetitive questions and some that have different answers.. that’s because I couldnt find the definitive answer. All I can tell you is that I pass with a 900/1000 just by studying this file. This mean that I DO have some wrong answers.

    Here is the link to your free test dump!


  4. Ch
    March 11th, 2017

    Thanks Rob for the link. Are you sure that these are valid dumps? I am appearing for exam next week

  5. Rob
    March 13th, 2017

    @Ch ..its the best I could do.. I tried to correct all the wrong answers from DUMPS4DOWNLOAD.. I got 900 by using this which means there are some wrong answers

  6. karim
    March 14th, 2017

    Hi Guys can you please send me ICND1 dump {email not allowed}

  7. karim
    March 14th, 2017

    {email not allowed}

  8. Anonymous
    March 14th, 2017

    Rob, you are a legend.

  9. nobs
    March 16th, 2017

    Hey Jerry, how many simulations were in icnd1. Congratulations on your achievements.

  10. Fakefake
    March 16th, 2017

    Hey @Rob thanks very much for the dump, Did you take the exam recently? and did this dump reflect the questions that were on there.

  11. Anonnymous
    March 20th, 2017

    Por favor compartir examen my email: {email not allowed}

  12. Anonymous
    March 20th, 2017

    thanks Rob! you r rock

  13. Nickname
    March 20th, 2017

    Guys; please send here the link with 284 dumps or any dump with more than 221 questions. this is the only one i find on other free sites

  14. Fling
    March 21st, 2017

    Hi Rob, I am going to be sitting for the exam soon but wanted to know how to get the dump.

  15. Fling
    March 21st, 2017

    Rob, disregard my question. I found it. Thanks for your help.

  16. Tazz
    March 27th, 2017

    Hi guys i am writting icdn1 sometime this week please help with dump link

  17. Tokkie
    April 5th, 2017

    I see expanations but no questions. Where can I found the content of the questions ? Sorry but newbie here.

  18. Fazz
    April 16th, 2017

    Am gonna write ICND1 on 18th of this April . Any suggestions ? Any of u wrote the exam in this month ?

  19. Anonymous
    April 19th, 2017

    ospf is not part of icnd1 100-105 as per cisco website…why we have so many questions on ospf in dumps.Are these dumps real?

  20. Anonymous
    April 19th, 2017

    ^Was thinking the same dam thing. Wth is up with all the OSPF?!?!

  21. Anonymous
    April 22nd, 2017

    If any of you guys had the lastest dumps or anything please could you share , I’ve come short twice with this exam (788,813) I really want to just pass πŸ™

  22. Easy
    April 24th, 2017

    Just failed the exam today..had 801

  23. Anonymous
    April 25th, 2017

    Any recent dumps?

  24. Anonymous
    April 25th, 2017

    taking the exam in May is there a more recent dump?

  25. Anonymous
    April 26th, 2017

    Hey I will take a test next week. But I need to learn that how to find dumps form link below;

    I haven’t seen this.Do I need to sign in?

  26. Cat
    April 29th, 2017

    I have taken the exam twice and I am falling short 790/810. Where can I find the dump questions?

  27. need help my test is next week for the 100-105
    April 30th, 2017

    Rob where can I get this information from I couldn’t download it..

  28. need help my test is next week for the 100-105
    April 30th, 2017

    Rob, How can I get your files? do you have to be a member of filedropper? I am new and need help… taking my exam next Monday….

  29. need help my test is next week for the 100-105
    April 30th, 2017

    Can anyone that pass the test for 100-105 please email me any dump they have for this exam please… {email not allowed}
    my test is next week and need help…

  30. Bob-doe
    May 3rd, 2017

    Does any one have any updates to how they did using the info Rob provided? I d/l it am ready to go next week. just looking to see if there are any changes that need to be made.

    thanks! oh and Rob, thanks for the great work!

  31. Anonymous
    May 4th, 2017

    rob you are the best.

  32. Gray
    May 4th, 2017

    Failed on 1-May with 800, retesting 7-June. This time I will incorporate Rob’s dump and see how I do. Only (1) LabSim and it was the DHCP one that is on here which is relatively easy – seemed like there was some new material but don’t remember much..

  33. Mr. Alp
    May 10th, 2017

    Hi, this dump posted by Rob is really valid?

  34. Anonymous
    May 12th, 2017

    @Mr. Alp yes. but some answers needs to be corrected

  35. Nirbad
    May 12th, 2017

    @rob you ROCK man!! I passed today….slightly tweaked of Rob’s version….moving to ICND 2

  36. vijay
    May 12th, 2017

    Guys are there any simulations question in icnd1 100-105 ?

  37. Raider
    May 12th, 2017

    Guys im writing ICND 1 next month, any dumps?

  38. ANI
    May 14th, 2017

    Hi I just signed up as a premium member and I CAN see all CCNAv3 questions and answers but when I want to see the ICND1 and 2 Q&A it asks me to log in and when I do it says incorrect user name and password. why is that?

  39. jane woken
    May 16th, 2017

    hi guys,
    can someone send me the dumps according the answers of this site for ICND1???? please please please. I really neeeeeeeeeeeeeeeed it. my email address is jane_woken52 at yahoo.com . It will be big help. Pleeeeeeeeeeeeeeeease .

    my email address is jane_woken52 @ yahoo.com

  40. natutota
    May 16th, 2017

    Anyone has valid 100-105 vce dumps?
    If yes – can you please send it? My email is natutota at tutanota.com
    And give me your payback email (or different way) to send you my return πŸ™‚

  41. jane
    May 17th, 2017

    hi guys,
    can someone send me the dumps according the answers of this site for ICND1???? please please please. I really neeeeeeeeeeeeeeeed it. my email address is jane_woken52 at yahoo.com . It will be big help. Pleeeeeeeeeeeeeeeease .

    my email address is jane_woken52 @ yahoo.com

  42. jane
    May 17th, 2017

    hi guys,
    can someone send me the dumps according the answers of this site for ICND1???? please please please. I really neeeeeeeeeeeeeeeed it. heeeeelp me please πŸ™ πŸ™ .

    my email address is jane_woken52 @ yahoo.com (no spaces before and after @ sign)

    πŸ™ πŸ™

  43. Jabu
    May 18th, 2017

    hi -Anyone has valid ICND1 dumps?Please email alok_gusain @ yahoo.co.nz

  44. Fahim
    May 18th, 2017

    HI friends anyone have latest ICND1 100-105 dumps with answer

  45. Anonymous
    May 23rd, 2017

    Hi friends, why do you think that Rob’s dumps are not already valid? how often dumps are changed?

  46. Fox
    May 23rd, 2017

    hi gusy >>
    I have taken the exam twice and I am falling short 816/825. Where can I find the dump questions?

    if any know where i can find valid dumps pls let me know >>>

  47. Fox
    May 23rd, 2017

    i will try rob dumps look like good dumps and i find lat of Question in exam matching rob dumps>>

  48. Mamito
    May 29th, 2017

    hi guys .I was mocked by the exam today.where can I get valid dumps?

  49. hackker777
    June 7th, 2017

    @ MAMITO, hows the exam?

  50. john
    June 14th, 2017

    hey Team,

    anyone has dumbs for 100-105?
    if you have any please reply!!

  51. paradise
    June 17th, 2017

    Guys, probably ROB dumbs are ok. But for sure are not updated. There are too many questions about OSPF which is not on ICND1. So, probably are very old questions from the 100-101 exam. Or maybe are also some valid questions but is hard to say.

  52. alm
    June 19th, 2017

    hi there, i don’t see any questions for the icnd 1 100-105 test. i only see the answers. Can i downlod the questions and answers as pdf file. Please help

  53. beamy
    June 20th, 2017

    Rob’s dump has a massive amount of OSPF questions. OSPF was not in CCNA1 and CCNA2.

    Are there a massive amount of OSPF in the icend1-100-105 exam?

  54. Anonymous
    June 22nd, 2017

    Took the icnd 1 today, only one of the questions in Robs dump was included.

Comment pages
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