ICND1 – OSI & TCP/IP Model
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Premium Member: You can test your knowledge with these questions first via this link.
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Note: If you are not sure about OSI Model, please read my OSI Model Tutorial.
Question 1
[am4show have=’p2;’]Which OSI layer header contains the address of a destination host that is on another network?
A. application
B. session
C. transport
D. network
E. data link
F. physical
Answer: D[/am4show]
Question 2
[am4show have=’p2;’]At which layer of the OSI model does the protocol that provides the information that is displayed by the show cdp neighbors command operate?
A. application
B. transport
C. network
D. physical
E. data link
Answer: E[/am4show]
Explanation
CDP runs at Layer 2 (Data Link) of the OSI model -> E is correct.
Question 3
[am4show have=’p2;’]What are two common TCP applications? (Choose two)
A. TFTP
B. SMTP
C. SNMP
D. FTP
E. DNS
Answer: B D[/am4show]
Explanation
SMTP stands for Simple Mail Transfer Protocol. It’s a set of communication guidelines that allow software to transmit email over the Internet while File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host to another host over TCP-based network.
Note: Simple Network Management Protocol (SNMP) uses UDP as the transport protocol for passing data between managers and agents. SNMP uses UDP to help reduce the impact on your network’s performance. Although SNMP can be configured to run on TCP but we should only do it in special situations. SNMP uses the UDP port 161 for sending and receiving requests, and port 162 for receiving traps from managed devices.
DNS work on both the TCP and UDP protocols. DNS uses TCP for zone exchanges between servers and UDP when a client is trying to
resolve a hostname to an IP address. Therefore in most cases we say “DNS uses UDP”.
Question 4
[am4show have=’p2;’]Which two characteristics describe the access layer of the hierarchical network design model? (Choose two)
A. layer 3 support
B. port security
C. redundant components
D. VLANs
E. PoE
Answer: B D[/am4show]
Explanation
The primary function of an access-layer is to provide network access to the end user.
The hardware and software attributes of the access layer that support high availability include security services for additional security against unauthorized access to the network through the use of tools such as 802.1x, port security, DHCP snooping, Dynamic ARP Inspection, and IP Source Guard.
Question 5
[am4show have=’p2;’]Which layer of the TCP/IP stack combines the OSI model physical and data link layers?
A. Internet layer
B. transport layer
C. application layer
D. network access layer
Answer: D[/am4show]
Explanation
The picture below compares the two TCP/IP and OSI models:
Question 6
[am4show have=’p2;’]Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments?
A. Physical
B. Data-link
C. Transport
D. Network
Answer: C[/am4show]
Explanation
Transmission Control Protocol (TCP) has all the features mentioned above and TCP resides in Transport Layer (Layer 4) of the OSI model.
Flow control: A methodology used to ensure that receiving units are not overwhelmed with data from sending devices when buffers at a receiving unit are full, a message is transmitted to the sending unit to temporarily halt trans-missions until all the data in the receiving buffer has been processed and the buffer is again ready for action.
Sequencing: is used to number segments before sending so they can be put back together again in the correct order at the receiving side.
Acknowledgment: When the receiver gets the data, it sends a response telling the sender that the data have been safely arrived.
Question 7
[am4show have=’p2;’]Which network device functions only at Layer 1 of the OSI model?
A. 
bridge
B. 
hub
C. 
NIC
D. 
router
E. 
switch
Answer: B[/am4show]
Explanation
In CCNA, the popular devices operate in Layer 1 are hub and repeater.
Question 8
[am4show have=’p2;’]A network administrator cannot connect to a remote router by using SSH. Part of the show interfaces command is shown.
| router#show interfaces Serial0/1/0 is up, line protocol is down |
At which OSI layer should the administrator begin troubleshooting?
A. physical
B. data link
C. network
D. transport
Answer: B[/am4show]
Question 9
[am4show have=’p2;’]On which OSI layer does a VLAN operate?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Answer: B[/am4show]
Hello,
are you sure the answer to question 4 is A, B? I believe it should be B,D.
Even I think the answer to question 4 is B,D
Please review question 7, this could be either B and C there should be a ‘choose two’
Mike, a NIC operates at two layers and the question states “which device operates ONLY at Layer 1 of the OSI model.” You have to watch for those keywords. 🙂
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I have a exam this evening on chapter 3 these questions really help.
Answers to question 4 must be wrong. Why would an access layer switches support Layer3 (IP addresses) if the Ethernet operates at Layer2? I believe it’s B and D.
I think Question 4 should be amended to “Choose 3”.
I was investigating and the answer of the question 4 is Security Port, VLAN and PoE http://www.ciscopath.com/content/61/
RE question 4: i saw it somewhere else and the correct answers are B and D.
Please change it.
It is enough to study the question from 200-120 or i want this part of questions ah????
Según CCNP SWITCHING
Access Layer In-Depth
The building access layer aggregates end users and provides uplinks to the distribution layer. With the
proper use of Cisco switches, the access layer may contain the following benefits:
• High availability: The access layer is supported by many hardware and software features.
System-level redundancy using redundant supervisor engines and redundant power supplies for
critical user groups is an available option within the Cisco switch portfolio. Moreover, additional
software features of Cisco switches offer access to default gateway redundancy using dual
connections from access switches to redundant distribution layer switches that use first-hop
redundancy protocols (FHRP) such as the hot standby routing protocol (HSRP). Of note, FHRP and
HSRP features are supported only on Layer 3 switches; Layer 2 switches do not participate in
HSRP and FHRP and forwarding respective frames.
• Convergence: Cisco switches deployed in an access layer optionally support inline Power over
Ethernet (PoE) for IP telephony and wireless access points, enabling customers to converge voice
onto their data network and providing roaming WLAN access for users.
• Security: Cisco switches used in an access layer optionally provide services for additional
security against unauthorized access to the network through the use of tools such as port
security, DHCP snooping, Dynamic Address Resolution Protocol (ARP) Inspection, and IP Source
Guard. These features are discussed in later chapters of this book.
En síntesis, debería ser PoE y también seguridad de puertos según lo descrito por el libro oficial de CCNP.
So in the Question 4 correct B and D? (Port Security and PoE) right?
@Riccardo,
B and D are port security and VLANs. Anyway, I totally agree to all that layer 3 support should not be the answer, but VLAN is also being used in distribution and core layer. For me, if its asking for 3, then definitley its B, D and E. But since its just asking to choose 2, I’ll put my money on B and E (port security and power over ethernet).
@9tut – hope you can review this and provide more detailed explanation as to why its A and B.
Anyone,
I plan on taking exam next week. What other sims/labs did you get besides the OSPF 6 router?
Thanks in Advance!
J’ai l’intention de prendre l’examen la semaine prochaine. Quels sont les autres sims?
Question 4 answer is B(port security) and E(POE)
@9tut
Why is the answer in question 4 A B and not B E?
Thanks,
My self for question 4,i could recommend B and D as the correct answers the network access layer is the combination of physical and datalink layer so how could it be A and B? A deals with ip address
Is this what you meant? Access layer: The main purpose of the access layer is to provide direct connection to devices on the network and controlling which devices are allowed to communicate over it. The access layer interfaces with end devices, such as PCs, printers, and IP phones, to provide access to the rest of the network. The access layer can include routers, switches, bridges, hubs, and wireless access points (AP).
Switch features in the Access layer:
Port security
VLANs
Fast Ethernet/Gigabit Ethernet
Power over Ethernet (PoE)
Link aggregation
Quality of Service (QoS)
I searched the CISCO website, and found this description:
At the same time as providing simple uncomplicated network access for users, the access layer provides the first line of security defense for the network, provide service differentiation based upon management policies and, providing power to support the deployment of specialized devices.
The roles can be broken broadly into the following areas:
•Access layer security
•Access layer QoS
•Access layer Power-over-Ethernet (PoE)
Since CISCO’s definition is Security and PoE, I’d go with those two. B and E
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Education/SchoolsSRA_DG/SchoolsSRA-DG/SchoolsSRA_chap9.html
Thnx 9tut u made it all possible, passed 947
Question 4 is B, E. D is vague and depending on use, can be applied to distribution or access layer.
Q4 is tricky. access layer main focus is connecting end devices to the rest of the network.
I would say main goal is connection and security.
connection is PoE and VLANs
security is port security.
If i had to choose, i would choose Port Sec and VLANs.
Why is question 4 even here? It has to do with the Cisco hierarchical model , not the OSI model.
Arriba Cruz Verde
Welcome to Potrero City
Question 4 should be B D
At access layer switches appears, so secuirty and Vlans comes in, Also we can not create vlans in routers, please correct me if I am wrong.
Passed my 100-101 exam today and question 1, 3 and 6 was there.. all the best.
Q4:
Answer is B D
L3 support is designated at the distribution layer, not the access layer. Can you imagine a building with routing in every single switch closet? Access laeys is about 3 services: high availability, POE, and port security (security services).
I hope this helps.
Question 4 should be B and D @9Tut why you not saying nothing?
Got 986/1000 Marks, {5/16/2014} 50 Questions, Ospf Sim, Security simlet, and Router and switch Simlet Was also there…..All questions From 9tut. and Examcollections…..Now Heading For Icnd2 And Blogging…..
For Any Help.
Manohar Tn
Website: http://www.techlinko.com
G+ : https://plus.google.com/u/0/+ManoharTN9/
@all: Q.4 the answers should be B D. Thanks for your detection. We updated it!
@all:Q- 4 is now corrected it was a mistake i believe so.
Shout out to 9tut… you are awesome
This is awesome I’ve been looking for a site like this for days, now I got it watch the space CISCO CERTIFICATES. Thanks to all of you guys for your participation and also thank you 9tut
I would be so grateful if someon can please send the latest ICDN1 and ICND2 dumps to my email jscott3@heidelberg.edu. I’ll be very grateful
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Hi Guys,
I’m planning to take the ICND1 this Sunday, Are there any changes or the questions will be the same. Please for the people who take the exam recently. What’s your opinion?
Thanks for help
Hi,
Most of the question ICNDI exam. from 9.tut and ospf sim.
Guys Q No.4 answer is A & B…..
Hi everyone,
I will have my exam in 2 weeks Please send send me the dumps ICND1 gfedejko@yahoo.com
much appreciated
http://www.ciscopath.com/content/61/ does list Q4 having Ans: B, D, & E. The other 2 are listed as Layer 2 Distribution layer. Just saying.
Switch features in the Access layer: I.Port security
II.VLANs
III.Fast Ethernet/Gigabit Ethernet
IV.Power over Ethernet (PoE)
V.Link aggregation
VI.Quality of Service (QoS)
http://www.ciscopath.com/content/61/ tells about layer of The Hierarchical Network Model, but Question 4 ask about the Access layer of TCP/IP model. Please, attend!
i will pass exam next week please send me the dumps ICND1 dukensstlouis@yahoo.fr
Questions 2-4 were in exam on 20/11/2014, more than 45 questions were from 9tut !
Q4 should be C & E
I can’t imagine the answer to question 4 has been debates for over a year now. 9tut help out here. What is the final answer?
@Deriq: Q.4 the answers are B & D. Although PoE is not wrong but B & D are better choices.
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For Q4, it is referring to the hierarchical design model, which is NOT OSI and suggests the three layer topology of core, distribution, and access. I think that they simply grabbed a question that someone else provided and did their best. If we are referring to Layer 2, then sure, VLANS and Port Security. However, in the Access layer design it clearly states that implementing VLANs, Port Security, and PoE are all part of the puzzle. This is difficult because the distribution layer also utilizes the handling of VLAN traffic. If only left to two possible answers, I would still say VLANs and Port Security though. Has anyone seen this question on THE ACTUAL TEST, not a dump or practice test?
@9tut, can you confirm what the question in Q4 is referring to, and if the three layer design, why PoE is less of a correct answer based on Cisco’s articles on their website? Thank you!
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Hey guys ….. I’d really appreciate it if someone could spare the ICND1 and the ICND2 dumps. I’m going in for my ICND1 test in the next week or two and I have done tons of study but the question layout seems to be tripping me up a bit …. would be great to see what the real question structure looks like.
Don’t mind throwing a starbucks your way or something for the help …. Thanks guys!
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Questions 1, 2 and 7 were on the exams.
q4 in icnd1 exam today
q3 was in the exam
We have succeeded in the exam today
Good luck to all
Thanks 9tut
Question 5 in exam today( drag an drop)
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Still confused why q4 is B/ D when it states:
Figure 1-5 Access Layer
The access layer serves a number of functions, including
•Layer 2 switching
•High availability
•Port security
•QoS classification and marking and trust boundaries
•Address Resolution Protocol (ARP) inspection
•Virtual access control lists (VACLs)
•Spanning tree
•Power over Ethernet (PoE) and auxiliary VLANs for VoIP
http://www.ciscopress.com/articles/article.asp?p=2202410&seqNum=4
HI! Could someone PLEASE send me the latest ICND1 dumps? THANKS evansj51@yahoo.com
PASSED in United States, in New Mexico got a 947. id like to say 98% of all questions were on here except one maybe two. some questions might of had different wording or addresses. but all the same as long as you study 9tut. understand why the answers are the answers youll do great. thanks you 9tut community. also dont get strung up on dumps in any way shape or form. spend 9 $ get the premium member ship and boom! next up off to ICND2!! good luch to all, and may the odds ever be in your favor!
Access layer question. it should 3 answers on this question, Port security, Vlan and Poe.
@9tut please give more explanation why would you choose Vlan over PoE?
guys i got the dumps from this link
wurl. cc/dumps
Hi, i passed exam on 26th june got 986. every question on this site bar one was on exam, the premium membership is well worth the $9 for the labs and quiz’s.
@all: We had to move all the questions and answers out of 9tut. We can only keep the explanation. You can download the questions and answers at: https://mega.co.nz/#!oIdESYbD!yyu33vygrfKPy4rcmcbV6qW2fxINNoTokuDM3CjA_og
why cant we see the questions
@tasha: We had to remove the questions because of copyrighted issues. We can only keep the explanation. We are very sorry for the inconvenience we caused. You can download all the questions at: http://www.4shared.com/office/WXdZDq7Xce/ICND1_2_Questions_July_2015.html
hi all.
I took ICND1 23-07-2015 and passed 907/1000………….thanks 9tut. I only study this site and got 907/1000 so, if you study extra sites you will be better than me. yeh there is no any configuration only practice “show COMMANDS” and practice all the SIMs.
How to make the questions appear? I see question number but no actual question.
@khurisu: We had to remove the questions because of copyrighted issues. We can only keep the explanation. We are very sorry for the inconvenience we caused. You can download all the questions at: http://www.4shared.com/office/WXdZDq7Xce/ICND1_2_Questions_July_2015.html
Hi do we have IPv6 question in icnd1 exam?
HI! Could someone PLEASE send me the latest ICND1 dumps? THANKS newsletterm@arcor.de
Hey 9tut are these the exact answers on the test or they are just similar? I suppose they will be all out of order as well. Can anyone tell me how they are?
I can not believe you removed all those questions! good to know that I’m not into it or to get any cisco certs from now and on! such $$$ hungry ppl!!
Pat, I’m not sure who you are targeting that comment to, but if it’s to 9tut you need to read their reasoning to removing the questions: “We had to remove the questions because of copyrighted issues.” They are not looking to get sued by Cisco; I think we can understand that part of wanting to keep their $$$
hie.
Any please email me the latest dumps. thank you guys.
Hello, someone can give me the link to download the questions?
Thanks a lot
Hi please send the latest dumps for CCNA 1,2,3 AND 4 to saviour.majansi@zamtel.co.zm
Why am I only seeing the explanations and not the questions?
Do I have to have a premium account to see the questions? All I see is the explained answers.
Is there a new dump/question link? The one from July 31st. 2015 doesn’t work.
Please send to {email not allowed} if so please. Thanks!
To jdark628 at gmail
Hi,can someone please update me with the link for the questions above
Hi,
I cannot find the questions. I can see only the explanations. Could someone tell me how to see the questions?
@9tut
The links to questions is not valid any more. Could pls post new link
Dude your site is AWESOME!. Bless you bradda
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