Drag and Drop Questions 2
Here you will find answers to Drag and Drop Questions – Part 2
Question 1
Drag the network characteristic on the left to the design method on the right which will best ensure redundancy at the building distribution layer
Answer:
Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches:
FHRP for convergence, no VLANs span between access layer switches across the distribution switches
Layer 3 between distribution and access layers, with a Layer 3 link between the distribution switches:
Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches
VSS: Convergence (FHRP) is not an issue
Question 2
Click and drag the QoS feature type on the left to the category of QoS mechanism on the right.
Answer:
+ classification and marking: ACLs
+ congestion avoidance: WRED
+ traffic conditioners: CAR
+ congestion management: LLQ
+ link efficiency: LFI
Explanation
Classification is the process of partitioning traffic into multiple priority levels or classes of service. Information in the frame or packet header is inspected, and the frame’s priority is determined.Marking is the process of changing the priority or class of service (CoS) setting within a frame or packet to indicate its classification. Classification is usually performed with access control lists (ACL), QoS class maps, or route maps, using various match criteria.
Congestion-avoidance techniques monitor network traffic loads so that congestion can be anticipated and avoided before it becomes problematic. Congestion-avoidance techniques allow packets from streams identified as being eligible for early discard (those with lower priority) to be dropped when the queue is getting full. Congestion avoidance techniques provide preferential treatment for high priority traffic under congestion situations while maximizing network throughput and capacity utilization and minimizing packet loss and delay.
Weighted random early detection (WRED) is the Cisco implementation of the random early detection (RED) mechanism. WRED extends RED by using the IP Precedence bits in the IP packet header to determine which traffic should be dropped; the drop-selection process is weighted by the IP precedence.
Traffic conditioner consists of policing and shaping. Policing either discards the packet or modifies some aspect of it, such as its IP Precedence or CoS bits, when the policing agent determines that the packet meets a given criterion. In comparison, traffic shaping attempts to adjust the transmission rate of packets that match a certain criterion. Shaper typically delays excess traffic by using a buffer or queuing mechanism to hold packets and shape the ?ow when the source’s data rate is higher than expected. For example, generic traffic shaping uses a weighted fair queue to delay packets to shape the flow. Traffic conditioner is also referred to as Committed Access Rate (CAR).
Congestion management includes two separate processes: queuing, which separates traffic into various queues or buffers, and scheduling, which decides from which queue traffic is to be sent next. There are two types of queues: the hardware queue (also called the transmit queue or TxQ) and software queues. Software queues schedule packets into the hardware queue based on the QoS requirements and include the following types: weighted fair queuing (WFQ), priority queuing (PQ), custom queuing (CQ), class-based WFQ (CBWFQ), and low latency queuing (LLQ).
LLQ is also known as Priority Queuing–Class-Based Weighted Fair Queuing (PQ-CBWFQ). LLQ provides a single priority but it’s preferred for VoIP networks because it can also configure guaranteed bandwidth for different classes of traffic queue. For example, all voice call traffic would be assigned to the priority queue, VoIP signaling and video would be assigned to a traffic class, FTP traffic would be assigned to a low-priority traffic class, and all other traffic would
be assigned to a regular class.
Link efficiency techniques, including link fragmentation and interleaving (LFI) and compression. LFI prevents small voice packets from being queued behind large data packets, which could lead to unacceptable delays on low-speed links. With LFI, the voice gateway fragments large packets into smaller equal-sized frames and interleaves them with small voice packets so that a voice packet does not have to wait until the entire large data packet is sent. LFI reduces and ensures a more predictable voice delay.
(Reference: Cisco Press Designing for Cisco Internetwork Solutions)
Question 3
Click and drag the Cisco Self-Defending Network term on the left to the SDN description on the right. Not all terms will be used.
Answer:
+ provides secure network access, isolates and controls infected devices attempting access: Trust and Identity Management
+ uses encryption and authentication to provide secure transport across untrusted networks: Secure Connectivity
+ uses security integrated into routers, switches, and appliances to defend against attacks: Threat Defense
+ integrates security into the network to identify, prevent, and adapt to threats: Cisco Self-Defending Network
Explanation
Trust and identity management solutions provide secure network access and admission at any point in the network and isolate and control infected or unpatched devices that attempt to access the network. If you are trusted, you are granted access.
We can understand “trust” is the security policy applied on two or more network entities and allows them to communicate or not in a specific circumstance. “Identity” is the “who” of a trust relationship.
The main purpose of Secure Connectivity is to protect the integrity and privacy of the information and it is mostly done by encryption and authentication. The purpose of encryption is to guarantee confidentiality; only authorized entities can encrypt and decrypt data. Authentication is used to establish the subject’s identity. For example, the users are required to provide username and password to access a resource…
Question 4
Match the Cisco security solution on the left to its function on the right.
Answer:
+ protects the endpoints (desktops, laptops and servers): Cisco Security Agent
+ provides multiple functions as a high performance security appliance: ASA
+ prevents DDoS attacks: Anomaly Guard and Detector
+ provides Web-Based VPN services: SSL Service Module
+ prevents attacks inline: IPS Appliance
Question 5
Answer:
limits the number of frames transmitted before an acknowledgement is received: window size
reduces data size to save transmission time, optimizing the use of WAN bandwidth: data compression
allows network administrators to manage the varying demands generated by applications: queuing
discards packets or modifies some aspect of them (such as IP precedence): traffic policing
Question 6
Place the PPDIOO Methodology in the correct order
| Optimize | Step 1 |
| Design | Step 2 |
| Prepare | Step 3 |
| Implement | Step 4 |
| Operate | Step 5 |
| Plan | Step 6 |
Answer:
Step 1: Prepare
Step 2: Plan
Step 3: Design
Step 4: Implement
Step 5: Operate
Step 6: Optimize
Question 7
Answer:
Agent: generate traps of events
MIB: store information about network objects
SNMP: management transport mechanism
Manager: periodically collects object information
Explanation
The SNMP system consists of three parts: SNMP manager, SNMP agent, and MIB.
The agent is the network management software that resides in the managed device. The agent gathers the information and puts it in SNMP format. It responds to the manager’s request for information and also generates traps.
A Management Information Base (MIB) is a collection of information that is stored on the local agent of the managed device. MIBs are databases of objects organized in a tree-like structure, with each branch containing similar objects
I think question 7 answers are incorrect,
Agent- Agents use the Trap operation to inform the NMS manager of a significant alarm event.
Bruno, Anthony; Jordan, Steve (2011-06-09). CCDA 640-864 Official Cert Guide (4th Edition) (Kindle Locations 11384-11385). Cisco Press. Kindle Edition.
snmp – managment trasnnport mechanism
mib – store information about network objects
manager- periodically collects object information.
Thanks for this site :)
question 1 is wrong, vlan are span between two distributors only if a Layer2 link connect them.
In Implements Cisco switch Networks (SWITCH) Foundation Learning Guide starting from pag 256 there is the answer.
.. if a link Layer2 beetween connect access and distributors.
sorry
Guys/Gals,
Can someone please explain Q1.
I believe answers are incorrect?
@dstut
do you have anything on question 1
I think the answer need to be corrected
Folks, I think the first question is correct. Look at page 97-98 of the 640-864 guide:
The following are best practices at the distribution layer:
Use first-hop redundancy protocols (this is FHRP). HSRP or GLBP should be used if you implement layer 2 links between the layer 2 access switches and the distribution layer
Use the distribution switches to connect layer 2 Vlans that span multiple access layer switches. (L3 links between the access switches and the distribution layer)
VSS solves the STP unused blocked links problem (no convergence happens)
If I am looking at this wrong, please let me know as this question is bugging the heck out of me.
definitely 1 is wrong. if want span vlan trough dist then you need l2 trunk from access to distribution with stp enabled.
if l3 is enabled between access and distribution then no vlan information is transferrend but the l3 address then fhrp in access + eigrp/ospf with redundant paths connected to dist.
i would answer 1 3 2
I agree Question #1 is technically wrong but it might be correct on the exam.
For the record, I just recently took this exam. The answers for Question 1 here are (slightly) wrong.
The options SHOULD be:
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
3) VSS
What is the correct answer for this question ?
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
3) VSS
ok, been there done that – passed with 855. Not a walk in the park.
DnD on Data Centre and virtualisation technology that I had never seen previously anyhwhere
All but one of the DnD’s listed on the forum appear.
some others that appeared included.
When characterising the existing network get the order right in your head
Step 1, Identify all EXISTING organization information and DOCUMENTATION.
Step 2, Perform a NETWORK AUDIT that adds detail to the description of the network
Step 3, Use TRAFFIC ANALYSIS information to augment information on applications and protocols used. (remember by DNA acronym)
Q.Which consideration is the most important for the network designer when considering IP routing.
A. Convergence
Q about gathering as much detail as possible during a network audit…….. with minimal impact on devices themselves.
A. Netflow
Q Best practices in designing the access layer of E Campus (choose 2)
A. Always use Spanning Tree Protocol;preferred Rapid PVST
A.Use VTP transparent mode to decrease the potential for operational error
With deterministic WLAN Controller redundancy design, the different options have their own strengths. Which is true?
A. N+N reduncancy configuration allows logically grouping access points on controllers to minimise inter controller roaming events.
Q. Which is true of data centre access design?
A. With L2 access the default gateway for the servers can be configured at the access or aggregation layer
Q Which one of these statements should the designer keep in mind when considering advanced routing features.
A. The heirarchical felxibility of IPv6 addressing avoids…………….
Q8. Which 2 statements about designing the DC access layer are correct
A. Layer 2 connectivity is implemented in the access layer
A2. L2 clustering requires servers to be L2 adjacent
Q12. Which is true concerning enterprise data centre
A The data centre design will differ substantially depending on whether in Campus or Remote.
Q16. Characteristic only of a small remote site?
A. A collapsed Access and Distribution is required
Q18 What are 4 main benefits of PPDIOO life cycle approach
A improved business availability, increased NW availability, faster access to apps and serices, lower TCO.
Q20 When design solutions for the enterprise edge which would be the most suitable to consider. ( I wont share my answer as it may be wrong – look it up properly Brain dumps are conflicting)
Make sure you know which layer is the most Feature Rich – research as info on this sit conflicts with Cisco Press.
Q. What is Primary consideration when choosing a router NW design over a traditional campus NW design.
A L3 service support at NW edge
DND on Data centre was present Space, Power, Cooling, Security etc – DnD on this site is correct
Q When selecting which hardware to use throughout an Ent Campus. Which consideration is not relevant.
A number of shared media segments (technolgy is no longer relevant)
Why is a managed vpn approach preferred for Ent Teleworkers
A. allows centralised management and application of security policies
Q40. When considering the 3 VOIP design models……whcih question would eliminate one of these questions
A. Are there users whose only ent access is via a QoS enabled WAN
Q Which aspect would most likely be found in the draft design doc
A. the level of redundancy or high availability that currently exists or is required…..
Q around the 64Kbps bit rate
A. 2x4kHz x 8-bit code words (be careful – the answers had been juggled around)
Remember G729 recomended by Cisco for VoIP WAN
Which 3 mech are required to depoy QoS in IP WAN – go read as I have seen conflicting answers to this and I am not 100 sure my answer was correct.
Q WHich 2 routing protocols operate over NBMA point to multipoint NW without the use of p2p sub interfaces.
A. OSPF
A. EIGRP
Remember that Full Mesh, Partial Mesh and Star WAN topologies can be deployed in the Cisco Ent Arch WAN module
That’s all folks, at least that is all that I can remember.
I like http://www.aiotestking.com/cisco/2011/11/define-some-of-the-activities-tools-and-techniques-used-in-todays-network-design-processchoose-three/
I do not like www. certificationking.com – lot of wrong answers in dump, a lot of the questions are incorrectly worded. Stay clear.
Always remember….. A Little Knowledge is a Dangerous thing.
Really do recommend that your study the course work and understand the content.
No point having a certificate that says that you can tie your shoe laces when you cant. Sooner or later you will trip over and fall flat on your face and your academic credibility will be lost forever.
take care and good luck and I apologise if I hurt anyones feelings with some cutting remarks about stupid Q&A on the forum.
Suppose I best be off to aggravate the folk on CCNA forum now.
Smoggy
Is there a ccna 3 final quotsiens here? ?f not, i can upload it . But ? do not know how to do?Hi, AhmetCan you share the ccna 3 final quotsiens with me? I’m going to take the ccna 3 exam. So, please . my email address is
Today passed with 854, all things that Smoggy posted are valid.
Focus on DnD questions, there’re really lot of them.
Dont use dumps, there’re a lot of errors in it.
I just used CCDA official preparation book, Internet(for additional info, some things isnt covered well) and questions at the end of chapters.
Good luck.
Passed today 970/1000. Used lead2pass dump and studied the 640-864 official cert guide.
Almost all of the questions were from the lead2pass dump.
Drag and drop question were from the dump and dstut. But i suggest u can check 2-3 new DDs from the dump.
If u study the dump and dstut, you will pass.
Thanks everybody and good luck for all :)
Hi Vicent
can u please send me a copy of Lead2pass
shameer8283@gmail.com
thanks
Most of these drag and drop come up, but I had 2 new ones and also more new questions on Basic enterprise campus networks.
Oh and I passed by 868 points.
I failed today guys …, I have 5 new DDs and 5 older DDs. Many new questions – i would a round 50% plus appeared on this site. Please, do study Enterprise Edge and specifics about its submodules, as well as Virtualization of Cisco Data Center 3.0. I got around 4 or 5 questions on this section, which i ignored during my readings.
Please read the book official CCDA book 4th Edition for 640-864. I failed with 783 points. Good luck!
@ Anonymous – Did you use any dumps to study? If so, were they the same questions or different?
Anyone else take it recently that knows if the dumps are still valid?
@DA, I did the dumps shown on this site (where you are in now). about five drag and drops seen here appeared in the exams. about Sevens other Drag and drops, I saw them in the 640-864 official book but could not remember the matching criteria because i just skipped them during my reading. I just went like oh shit…, i saw this table in the book, and the next question, i went like, holy shit…, i saw this table in the book…, i also skipped much of the Virtualization of Cisco Data Center during my reading and I pay the price. I didn’t do any other dumps – i think there are latest dumps somewhere out there …., but i do not want to pay for dumps. I saw one at certcollection.org for 640.863, don’t trust those sources, many wrong answers. if you want to pass the first time, i recommend you to pay for the latest dump somwhere or keep banging hard ahead just like me and prepare harder for the next attempt. i booked mine in 2 weeks again today to give me enough time to look into Cisco Virtualization. Good luck once again!
Hi Vincent, could you please send me a copy of the Lead2pass you use for reviewing for CCDA. My email again is: mymsnacc@hotmail.com. Thanks big time :-)
Can someone send me a copy of the lead2pass please :)
amine.medouar@gmail.com
Could some please send me the lead2pass dump to roy2140@gmail.com many thanks :)
Question 1:
Drag the network characteristic on the left to the design method on the right which will best ensure redundancy at the building distribution layer
Answer:
Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches:
–> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches
Layer 3 between distribution and access layers, with a Layer 3 link between the distribution switches:
–> FHRP for convergence, no VLANs span between access layer switches across the distribution switches
VSS: –> Convergence (FHRP) is not an issue
Can any one share the latest dump here.. my paper in week time..Thanks
please guyz
i have my exam next week
someone send me this book
CCDA book 4th Edition for 640-864
Francistito@gmail.com
Question 1:
All,
for clarification on Q1, as mentioned above, the question is wrong and you will find it wrong also in many study guides/dumps, like my actualtests.com dump also has it wrong.
As the user “Question 1″ stated above, the first and second options on the right side of the question are wrong.
I just took the test and the right side blocks are actually:
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
3) VSS
Finally, the question starts to make sense. This question is about layer 2 switching. You can span a VLAN across Layer 2 switches, but if there is a Layer 3 link between them, you need some extra stuff…
So the questions and answers are:
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
–> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
–> FHRP for convergence, no VLANs span between access layer switches across the distribution switches
3) VSS
–> Convergence (FHRP) is not an issue
Choices for 1 and 2 are because FHRP is a Layer 3 protocol, so you would not have it without Layer 3 in the mix.
Source for the 3rd choice is here:
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/white_paper_c11_589890.html
“Managing the Layer 3 Network
In VSS, no First Hop Redundancy Protocol (FHRP) protocol is configured, as it is not needed.”
Hi
I am going to exam of CCDA Plz sends me dums question as soon . And simulation pani aau6 ki? mailing address pakuwalsundar@ymail.com
sundarpakuwal@gmail.com
Is simulation there CCDA exam ?
Looks like the lead2pass dump has the answers wrong that Keith mentioned above. According to the dump:
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
–> FHRP for convergence, no VLANs span between access layer switches across the distribution switches
–> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
–> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches3)
VSS
–> Convergence (FHRP) is not an issue
The dump or whoever compiled the dump got this one wrong while Keith is correct.
We know that routers do not forward broadcasts so to me this means that vlans cannot span across them however if we use a Layer 3 switch, we can set up a layer 2 link that will forward the vlan information.
If Im way off with this, let me know.
I doubled up the answer on my last comment that might make it look cofusing. So Im posting again to show what the dump is saying.
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
–> FHRP for convergence, no VLANs span between access layer switches across the distribution switches
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
–> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches3)
VSS
–> Convergence (FHRP) is not an issue
The answer for this quesiton seems to be wrong per what Im reading about CatOS.
In a Cisco CatOS switch, what is the recommended practice when configuring switch-to-switch intercommunications to carry multiple VLANs for Dynamic Trunk Protocol?
A.
auto to auto_negotiate
B.
disable Dynamic Trunk Protocol when operating in the distribution layer
C.
auto to auto_no_negotiate
D.
desirable to desirable_no_negotiate
E.
on to on_negotiate
F.
desirable to desirable_negotiate
According to the CCDA cert book, best practices are to use ON to ON_negotiate and that is the answer that the dumps are sayig is correct, however the CatOS documentation says and I quote “Cisco recommends an explicit trunk configuration of desirable at both ends. In this mode, network operators can trust syslog and command line status messages that a port is up and trunking, unlike on mode, which can make a port appear up even though the neighbor is misconfigured. In addition, desirable mode trunk provides stability in situations where one side of the link cannot become a trunk or drops trunk state.”
http://www.cisco.com/en/US/products/hw/switches/ps4324/products_tech_note09186a0080094713.shtml#vlan_trunking_protocol
On page 96 of the CCDA cert exam book, Access Layer best practices: Set Trunks to ON and ON with no-negotiate. So answer E isnt correct anyways since it states ON to ON_negotiate. With this information, the answer has to be D…..
Somebody want to chime in? Im taking the test tomorrow and would like some thoughts. I posted several other questions that seem to be wrong in the “Share your CCDAv2 experience” page but nobody has responded to those posts either.
Can somebody explain how the answer to this question is Etherchannel?
You are designing a small branch office that requires these attributes:
support for 60 users
the growth capacity to add another 15 users soon
redundant access
higher bandwidth between the Layer 2 switch and routing to the WAN
Which branch office topology or technology must be used?
A.
EtherChannel
B.
loop-free
C.
three-tier
D.
two-tier
E.
integrated routing and switching
That answer makes no sense at all. Etherchannel is a technology about port aggregation, not site topology. The answer is cleary D for a two-tier design for up to 100 users.
I passed the exam today with a 912. The last 2 questions that I posted on here that are confusing did not show up on the exam thankfully. There were a couple of new questions and 2 DnDs that were not listed here or in the VCEs. I think I got them right but since we dont know which questions we get wrong, I will never know. Off to start working on my CCNP and CCDP. Later dudes……………
Can someone please suggest.. what dumps to follow and are correct.. I need to give exam in 2 days..
can someone please tells us if theses drag and drop are still valid ? thx for sharing
I recall questions 1 and 5 were on the exam …as well as many others. I’m guessing I had at least ten D &Ds, so know them! Also, there were several multiple choice questions regarding virtualization, and one question regarding the step order of characterizing a network. Another important note…the multiple choices are mixed up, they don’t match the brain dumps. Bottom line–read the Ciscopress 640-864 book, study your azzes off, don’t rely on the dumps alone and you’ll be fine.
Hi, can you help send me the CCDA 640-864 pdf study Guide…appreciate your help greatly..thank you. (email: samteo25@yahoo.com)
TO ALL
It seems that maybe there was a test refresh somewhere in Late July / Early August, which has made some of these existing D/D, Lead2Pass, and ActualTest dumps no longer included. I noticed that these most current Lead2Pass, and ActualTest questions are the same as in the current Pass4Sure as well.
This leads me to believe that there isn’t ‘the most recent’ dump data available.
Can anyone confirm this?
–Scott
Passed CCDA today w/ 868 :)
Lots of study required. I’d say that most of these questions shared here are good material to study, just verify all the answers you see w/ backed up cisco material.
I saw lots of the dstut.com d/d, and lots of other stuff in various dumps and study refs, study everything and read the book!
–Scott
Scott,
There were several new questions?
Thanks in advance.
I passed today with 883/1000 there were some new D&D and some new questions.
I studied the Official CISCO Certification GUIDE 640-864 4th edition and Actualtest dumps.
This site was very helpful.
Thank you dstut
Regarding Q1 above, assuming the question is misquoted (L2 with L2, vs L2 with L3) then this has to be the correct answer:
1) Layer 2 between distribution and access layers, with a Layer 2 link between the distribution switches.
–> Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches3)
2) Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches.
–> FHRP for convergence, no VLANs span between access layer switches across the distribution switches
VSS
–> Convergence (FHRP) is not an issue
stated very clearly here:
http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/HA_campus_DG/hacampusdg.html#wp1108899
I uploaded this file ActualTest-Certifyme-Pass4sure.Cisco.640-864.v2011-11-11.by.DD.331q.vce today, so should be there by 11/15/2012
It seems that there are only 4 questions that have answers that differ – depending on the source. This includes
1) the Vitualization Question (already included in DSTUT)
2) D&D matching
email applications
IP voice network services
Budget Business constraint
Security Technical goals
3) When designing the wireless portion of an enterprise campus network,
which one of these statements should serve as a strict guideline?
Wireless controllers should be distributed throughout the building distribution layers
Dynamic controller redundancy, where the access points attempt to join the least loaded controller, is a best-practice approach
Wireless controllers should be centralized in the core layer ************
To improve the RF coverage, the controllers of any building should be put in the same mobility group. – some say this answer -
4) You are designing a small branch office that requires these attributes:
support for 60 users
the growth capacity to add another 15 users soon
redundant access
higher bandwidth between the Layer 2 switch and routing to the WAN
Which branch office topology or technology must be used
EtherChannel some say this is the answer
loop-free
three-tier
two-tier ******
ntegrated routing and switching
For Ques 4
http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html
Access:
+ provide security, QoS, and IP multicast to network
+ the most feature-rich parts of the campus network
Distribution:
+ enforces policy within the network
+ routing boundary (dynamic, summarization, static)
Core:
+ high level of availability, scalability and fast convergence
+ provides a limited set of services
===============================================================================
Space: amount of racks, equipment, cabling, people
Weight load: rack servers vs blade servers
Power: variability of computing load, computing power and memory requirements
Cooling: arranging equipment racks face-to-face or back-to-back
Cabling: abundant, variable, well organized and easy to maintain
Security: disasters, fire suppression and alarm systems
===============================================================================
Layer 2 between distribution and access layers, with a Layer 3 link between the distribution switches:
FHRP for convergence, no VLANs span between access layer switches across the distribution switches
Layer 3 between distribution and access layers, with a Layer 3 link between the distribution switches:
Support Layer 2 VLANs spanning multiple access layer switches across the distribution switches
VSS: Convergence (FHRP) is not an issue
===============================================================================
Great site. A lot of helpful information here. I am sending it to several friends ans also sharing in delicious. And of course, thanks for your sweat!