CCNP Enterprise Certification Study Guide (2020)

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CCNP®Enterprise Certification StudyGuideBen Piper

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Copyright © 2020 by John Wiley & Sons, Inc., Indianapolis, IndianaISBN: 978-1-119-65875-7ISBN: 978-1-119-65882-5 (ebk.)ISBN: 978-1-119-65880-1 (ebk.)Manufactured in the United States of AmericaNo part of this publication may be reproduced, stored in a retrieval system or transmitted inany form or by any means, electronic, mechanical, photocopying, recording, scanning orotherwise, except as permitted under Sections 107 or 108 of the 1976 United States CopyrightAct, without either the prior written permission of the Publisher, or authorization throughpayment of the appropriate per-copy fee to the Copyright Clearance Center, 222 RosewoodDrive, Danvers, MA 01923, (978) 750-8400, fax (978) 6468600. Requests to the Publisher forpermission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online athttp://www.wiley.com/go/permissions.Limit of Liability/Disclaimer of Warranty: The publisher and the author make norepresentations or warranties with respect to the accuracy or completeness of the contents ofthis work and specifically disclaim all warranties, including without limitation warranties offitness for a particular purpose. No warranty may be created or extended by sales orpromotional materials. The advice and strategies contained herein may not be suitable forevery situation. This work is sold with the understanding that the publisher is not engaged inrendering legal, accounting, or other professional services. If professional assistance isrequired, the services of a competent professional person should be sought. Neither thepublisher nor the author shall be liable for damages arising herefrom. The fact that anorganization or Web site is referred to in this work as a citation and/or a potential source offurther information does not mean that the author or the publisher endorses the informationthe organization or Web site may provide or recommendations it may make. Further, readersshould be aware that Internet Web sites listed in this work may have changed or disappearedbetween when this work was written and when it is read.For general information on our other products and services or to obtain technical support,please contact our Customer Care Department within the U.S. at (877) 762-2974, outside theU.S. at (317) 572-3993 or fax (317) 572-4002.Wiley publishes in a variety of print and electronic formats and by print-on-demand. Somematerial included with standard print versions of this book may not be included in e-books orin print-on-demand. If this book refers to media such as a CD or DVD that is not included inthe version you purchased, you may download this material at http://booksupport.wiley.com.For more information about Wiley products, visit www.wiley.com.Library of Congress Control Number: 2020935632TRADEMARKS: Wiley, the Wiley logo, and the Sybex logo are trademarks or registeredtrademarks of John Wiley & Sons, Inc. and/or its affiliates, in the United States and othercountries, and may not be used without written permission. CCNP is a registered trademark ofCisco Technology, Inc. All other trademarks are the property of their respective owners. JohnWiley & Sons, Inc. is not associated with any product or vendor mentioned in this book.

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I dedicate this book to the Lord Jesus Christ through Whom all thingswere created and in Whom all things hold together

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AcknowledgmentsI’d like to thank the following people who helped create thisCCNPEnterprise Certification Study Guide:Exam 350-401. A special thanksto Kenyon Brown, senior acquisitions editor, for the opportunity towrite this book. Thanks to John Sleeva, project editor, for pushing meto meet my deadlines. His suggestions and edits helped make thisbook more user friendly. Thanks also go to Christine O’Connor,production editor; Pete Gaughan, content enablement manager; andLouise Watson at Word One, proofreader. Jon Buhagiar reviewed thechapters and questions for technical accuracy. His comments guidedby his expertise helped make this book more practical, accurate, andwell rounded.

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About the AuthorBen Piper is a networking and cloud consultant who has authoredmultiple books including theAWS Certified Solutions Architect StudyGuide: Associate SAA-C01 Exam, Second Edition (Sybex, 2019), AWSCertified Cloud Practitioner Study Guide: Foundational CLF-C01Exam (Sybex, 2019), and Learn Cisco Network Administration in aMonth of Lunches(Manning, 2017). You can contact Ben by visitinghis website https://benpiper.com.

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CONTENTSCoverAcknowledgmentsAbout the AuthorIntroductionWhat Does This Book Cover?Interactive Online Learning Environment and Test BankExam ObjectivesObjective MapAssessment TestAnswers to Assessment TestChapter 1: Networking FundamentalsThe OSI ModelLayer 1: The Physical LayerLayer 2: The Data Link LayerLayer 3: The Network LayerLayer 4: The Transport LayerSummaryExam EssentialsReview QuestionsChapter 2: Spanning Tree ProtocolsThe Need for Spanning TreeVLANs and TrunkingRapid Per-VLAN Spanning TreeMultiple Spanning TreeSpanning Tree ExtensionsSummaryExam Essentials

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ExercisesReview QuestionsChapter 3: Enterprise Network DesignPhysical Network ArchitecturesLayer 2 DesignEtherChannelsFirst-Hop Redundancy ProtocolsSummaryExam EssentialsReview QuestionsChapter 4: Wireless LAN (WLAN)Radio Frequency FundamentalsWLAN 802.11 StandardsAccess Point ModesRoaming and Location ServicesSummaryExam EssentialsReview QuestionsChapter 5: Open Shortest Path First (OSPF)Link-State AdvertisementsNeighbor OperationsConfiguring OSPFSummaryExam EssentialsExercisesReview QuestionsChapter 6: Enhanced Interior Gateway Routing Protocol (EIGRP)EIGRP FundamentalsConfiguring EIGRP

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SummaryExam EssentialsExercisesReview QuestionsChapter 7: The Border Gateway Protocol (BGP)BGP FundamentalsConfiguring BGPSummaryExam EssentialsExercisesReview QuestionsChapter 8: Network Address Translation and MulticastNetwork Address TranslationMulticastSummaryExam EssentialsExercisesReview QuestionsChapter 9: Quality of ServiceUnderstanding Quality of ServiceClassification and MarkingPolicingQueuingShapingSummaryExam EssentialsExercisesReview QuestionsChapter 10: Network Virtualization

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Virtual Machines, Hypervisors, and Network VirtualizationGeneric Routing Encapsulation TunnelsIP SecurityLocation/ID Separation ProtocolVirtual Extensible Local Area NetworkVirtual Routing and ForwardingSummaryExam EssentialsExercisesReview QuestionsChapter 11: Software-Defined Networking and NetworkProgrammabilityWhat Is Software-Defined Networking?Software-Defined AccessSoftware-Defined WANNetwork Programmability and AutomationSummaryExam EssentialsExercisesReview QuestionsChapter 12: Network Security and MonitoringInfrastructure SecurityCisco Security ProductsWireless SecurityMonitoringSummaryExam EssentialsExercisesReview Questions

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Appendix Answers to Review QuestionsChapter 1: Networking FundamentalsChapter 2: Spanning Tree ProtocolsChapter 3: Enterprise Network DesignChapter 4: Wireless LAN (WLAN)Chapter 5: Open Shortest Path First (OSPF)Chapter 6: Enhanced Interior Gateway Routing Protocol(EIGRP)Chapter 7: The Border Gateway Protocol (BGP)Chapter 8: Network Address Translation and MulticastChapter 9: Quality of ServiceChapter 10: Network VirtualizationChapter 11: Software-Defined Networking and NetworkProgrammabilityChapter 12: Network Security and MonitoringIndexOnline Test BankEnd User License AgreementList of TablesChapter 1Table 1.1Table 1.2Table 1.3Chapter 2Table 2.1Chapter 3Table 3.1

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Table 3.2Table 3.3Table 3.4Chapter 4Table 4.1Table 4.2Table 4.3Chapter 8Table 8.1Chapter 9Table 9.1Table 9.2Chapter 11Table 11.1Table 11.2Chapter 12Table 12.1Table 12.2List of IllustrationsChapter 1Figure 1.1How layers abstract the network from anapplicationFigure 1.2At each layer, data is encapsulated in a PDU andpassed down to the n...Figure 1.3Layer 2 frame and layer 1 packet, structurallyidentical to the revis...

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Figure 1.4Early Ethernet over a shared medium comparedto Ethernet using a swit...Figure 1.5Simple layer 2 and layer 3 topologiesFigure 1.6Layered representation of the networkFigure 1.7Encapsulation of a TCP segment and IP packetinside an Ethernet frame...Chapter 2Figure 2.1Physical looped topologyFigure 2.2Converged STP topology with SW1 as the rootFigure 2.3Multiple VLANs over 802.1Q trunksFigure 2.4Converged STP topology with SW3 as the newrootFigure 2.5VLAN 1 topology with SW3 as rootFigure 2.6Converged VLAN 1 topology with SW2Gi1/0...Figure 2.7Multiple Spanning TreeFigure 2.8Physical topology for Exercise 2.1Chapter 3Figure 3.1East-West traffic flow in a data center networkusing the leaf...Figure 3.2Core, distribution, and access tiersFigure 3.3Two access-distribution blocks connected to thecoreFigure 3.4Collapsed coreFigure 3.5Switched vs. routed topologyFigure 3.6A looped triangle topologyFigure 3.7A looped square topologyFigure 3.8Recommended loop-free topologyFigure 3.9Loop-free U-topology

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Figure 3.10Loop-free inverted-U topologyFigure 3.11Virtual switch topologyFigure 3.12Routed access topologyFigure 3.13EtherChannel between SW3 and SW4Chapter 4Figure 4.1Representation of radio wave at 10 Hz with anamplitude of 1...Figure 4.2Amplitude decreases with the square of thedistance.Chapter 5Figure 5.1An OSPF topologyFigure 5.2Layer 2 topologyChapter 6Figure 6.1Simple EIGRP topologyFigure 6.2EIGRP weighted metric formulaFigure 6.3EIGRP layer 3 topologyFigure 6.4Layer 2 topologyChapter 7Figure 7.1BGP peers in different autonomous systemsFigure 7.2Route propagation and loop prevention amongBGP neighbors in...Figure 7.3Layer 3 topology using BGP, OSPF, and EIGRPChapter 8Figure 8.1Inside versus outside networksFigure 8.2Static NATFigure 8.3Layer 3 topologyFigure 8.4Layer 2 topology

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Figure 8.5Multicast topologyChapter 9Figure 9.1Setting a QoS profileFigure 9.2The Platinum QoS profileChapter 10Figure 10.1L2 VM-to-VM traffic using a virtualswitching...Figure 10.2L2 VM-to-switch traffic using a virtual switc...Figure 10.3L3 VM-to-VM traffic using a virtual switchan...Figure 10.4L2 VM-to-VM traffic switched internallyusing...Figure 10.5L2 VM-to-VM traffic switched externallyusing...Figure 10.6Underlay topology running BGP. R1 (AS65001) and R2 (AS 650...Figure 10.7GRE topologyFigure 10.8Using LISP for IP mobilityFigure 10.9VXLAN flood-and-learn configuration usingmul...Figure 10.10VRF topologyChapter 11Figure 11.1Scalable groups in Cisco DNA CenterFigure 11.2Group-based access control policies in CiscoDNA CenterFigure 11.3Network Settings page under the Designworkflow of Cisco DNA CenterFigure 11.4Inventory page under the Provision workflow ofCisco DNA Center

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Figure 11.5Fabric Infrastructure page under the Provisionworkflow of Cisco DNA...Figure 11.6Fabric Host Onboarding page under theProvision workflow of Cisco DN...Figure 11.7The Overall Health dashboard in the Assuranceworkflow of Cisco DNA ...Figure 11.8The Application Health dashboard in theAssurance workflow of Cisco ...Figure 11.9The Client Health dashboard in the Assuranceworkflow of Cisco DNA C...Figure 11.10The vManage Network Management Systemweb interfaceChapter 12Figure 12.1Example network topologyFigure 12.2WebAuth login page configurationFigure 12.3WLAN listFigure 12.4WLAN layer 2 configurationFigure 12.5RADIUS server configurationFigure 12.6AAA server configurationFigure 12.7WLAN WPA2 and 802.1X configurationFigure 12.8Specifying security and encryptionauthentication methodFigure 12.9Specifying user authentication modeFigure 12.10Setting a WPA/WPA2 preshared key

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IntroductionNetworking is uniquely challenging in that it's not a single technology,but a collection of interdependent technologies that every other aspectof IT depends on. Without networking, there are no connectedapplications and that means there are no IT employees. Even if you'renot sure that you want networking to become your permanent career,becoming an expert at networking will open the doors for other in-demand areas of IT, including security, software development, andcloud computing.Cisco's Professional Network CertificationsIn 2019, Cisco announced updates to its Cisco Certified NetworkProfessional (CCNP) certification program. There are six professionallevel certifications to choose from:CCNP EnterpriseCCNP Data CenterCCNP SecurityCCNP Service ProviderCCNP CollaborationCisco Certified DevNet ProfessionalEach certification requires passing one core exam and oneconcentration exam. The core exam for the CCNP Enterprisecertification is 350-401 ENCOR, “Implementing Cisco EnterpriseNetwork Core Technologies.” The concentration exams let you focuson a specific specialty, such as routing, wireless, network design,automation, or software-defined networking (SDN). Regardless of theconcentration exam you choose, you must pass the ENCOR exam toattain your CCNP Enterprise certification.Is CCNP Certification Right for You?

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Many who attain the Cisco Certified Network Associate (CCNA) don'tgo on to pursue more advanced Cisco certifications. So why should youconsider the CCNP Enterprise certification, and is it right for you? Itmay be right for you ifYou have a passion for networking.You want to set yourself apart as someone who has a passion fortechnology and isn't just in it for the money (although there isplenty of that!).You want to specialize in security, wireless, network automation,cloud, or software-defined networking.You enjoy tweaking the “nerd knobs” on individual technologiesjust to see what will happen.You love facing and overcoming the challenges of troubleshooting.Study TipsBefore taking the CCNP ENCOR exam, there are a few things to keepin mind. There's no reason that you can't pass the exam the first time.To help you do that, I want to share with you some study tips that havehelped me pass several Cisco certification exams on the first try. Oneof the neglected skills required on any Cisco exam is speed. Being ableto troubleshoot a 10-router Open Shortest Path First (OSPF) topologyis good. Taking 15 minutes to do it is not so good. I can't stress enoughthe importance of spending quality time with the command-lineinterface (CLI). You should spend at least 50 percent of your studytime on configuring and troubleshooting a variety of topologies andtechnologies.There's an old Latin proverb that repetition is the mother of learning.Repetition—in terms of both study and practice—is going to be yourbest friend. Understanding networking requires making connectionsthat aren't always obvious, and the more you practice and study, themore opportunities your mind has to make those connections. Foryears I've used SuperMemo (https://super-memory.com), a flashcard-like program that lets you create your own question-and-answer pairs,quizzes you, and shows you how well you're retaining the information.

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What makes SuperMemo superior to flashcards is that it identifies theinformation you've already retained, and it doesn't waste timecontinuing to quiz you on it. That means you can safely load yourcollection with hundreds of items while still using your timeefficiently.One last tip: As you read this study guide cover to cover, keep arunning list of questions and things you're not sure about. Chances areif you find something confusing, a lot of other people did too, and thatmakes it good fodder for the exam. Be sure to visithttps://benpiper.com/encor for book resources, updates, and errata.Prerequisites and Lab RequirementsThe CCNA certification isn't required to attain the CCNP Enterprisecertification. Nevertheless, I strongly recommend that you obtain yourCCNA certification or the equivalent experience before embarking onyour CCNP Enterprise journey. Refer to the CCNA exam blueprint(www.cisco.com/c/en/us/training-events/training-certifications/certifications/associate/ccna.html) for a full list of topicsyou should already be familiar with. Because the CCNP Enterprise is aprofessional-level certification, I don't review some of the basicscovered by the CCNA such as subnetting, IPv4, and IPv6 addressing.You'll need a virtual or physical lab, which you should already havefrom your previous networking studies. Your lab should be able tosupport at least eight routers and two layer 3 switches running IOSversion 15.2 or later. You should be able to configure your lab on yourown by looking at layer 2 and layer 3 diagrams. Topology diagramswill be included in each chapter.If your existing lab doesn't meet the requirement, Cisco VirtualInternet Routing Lab (http://virl.cisco.com) includes virtual machineimages for a variety of switches and routers. These images are virtualmachines that run using QEMU and are light on CPU and memory, soyou don't need a beast of a server to run simulations, although moreresources always help. Other options, although not blessed by Cisco,are GNS3 (https://gns3.com) and EVE-NG (www.eve-ng.net).

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How to Use This BookHands-on experience is crucial for exam success. Each chapter in thisstudy guide contains hands-on exercises that you should strive tocomplete during or immediately after your reading of the chapter. Theexercises are there to test your understanding, and not to cover everypossible permutation of configurations. The exercises are yourfoundation, and you should build on them by experimenting withthem, breaking things, and then figuring out how to fix them.Each chapter contains review questions to thoroughly test yourunderstanding of the services and concepts covered in that chapter.They also test your ability to integrate the concepts with informationfrom preceding chapters. I've designed the questions to help yourealistically gauge your understanding and identify your blind spots.Once you complete the assessment in each chapter, referring to theanswer key will give you not only the correct answers but a detailedexplanation as to why they're correct. Even if you feel comfortable on acertain topic, resist the urge to skip over the pertinent chapter. Istrongly encourage you to carefully read this book from cover to coverso that you can discover your strengths and weaknesses—particularlythe ones you may not be aware of. Remember, even though you can'tlearn networking just by reading a book, it's equally true that you can'tlearnwithoutreading a book.The book also contains a self-assessment exam with 36 questions, twopractice exams with 50 questions each to help you gauge yourreadiness to take the exam, and flashcards to help you learn and retainkey facts needed to prepare for the exam.

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What Does This Book Cover?This book covers topics you need to know to prepare for the CCNPENCOR exam:Chapter 1: Networking FundamentalsThis chapter overviewsthe fundamentals of networking theory and network design.Chapter 2: Spanning Tree ProtocolsThis chapter coversSpanning Tree protocols, including Rapid Spanning Tree and MultipleInstance Spanning Tree. We also cover VLANs, trunking, and pruning.Chapter 3: Enterprise Network DesignIn this chapter, you'lllearn the advantages and disadvantages of different physical and layer2 network designs. We also dive into EtherChannels and first-hopredundancy protocols.Chapter 4: Wireless LAN (WLAN)This chapter explains thefundamentals of radio frequency, WLAN 802.11 standards, wirelesssecurity, and WLAN controller (WLC) design and deploymentconsiderations.Chapter 5: Open Shortest Path First (OSPF)In this chapter,you'll learn how to configure and troubleshoot OSPF adjacencies,authentication, route filtering, summarization, and more.Chapter 6: Enhanced Interior Gateway Routing Protocol(EIGRP)This chapter covers advanced EIGRP concepts, includingredistribution, multipathing, and path control.Chapter 7: The Border Gateway Protocol (BGP)In thischapter, you'll learn all about BGP, including path selection,redistribution, summarization, and filtering.Chapter 8: Network Address Translation and MulticastThistwo-for-the-price-of-one chapter gives you complete coverage ofnetwork address translation and multicast.Chapter 9: Quality of ServiceThis chapter covers QoS concepts,including queuing, policing, shaping, and classification.

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Chapter 10: Network VirtualizationThis chapter dives deep intovirtualization concepts such as server virtualization, networkvirtualization, generic routing encapsulation, IPsec, LISP, andVXLAN.Chapter 11: Software-Defined Networking and NetworkProgrammabilityIn this chapter, you'll learn about Cisco'ssoftware-defined networking (SDN) solutions, SD-Access, Cisco DNACenter, and SD-WAN. You'll also learn about network automationtools such as Python, RESTCONF, NETCONF, Ansible, Chef, Puppet,and SaltStack.Chapter 12: Network Security and MonitoringThis chapterwill show you how to implement infrastructure security best practicesand wireless security configurations. You'll also learn about Ciscosecurity products and how to monitor your network using NetFlow,IPSLA, debugs, Syslog, SNMP, and more.Interactive Online Learning Environment andTest BankThe interactive online learning environment that accompanies thisCCNP Enterprise Certification Study Guide: Exam 350-401providesa test bank with study tools to help you prepare for the certificationexam—and increase your chances of passing it the first time! The testbank includes the following:Sample TestsAll the questions in this book are provided, includingthe assessment test at the end of this introduction and the chaptertests that include the review questions at the end of each chapter. Inaddition, there are two practice exams with 50 questions each. Usethese questions to test your knowledge of the study guide material.The online test bank runs on multiple devices.FlashcardsThe online text banks include 100 flashcards specificallywritten to hit you hard, so don't get discouraged if you don't ace yourway through them at first. They're there to ensure that you're reallyready for the exam. And no worries—armed with the review questions,practice exams, and flashcards, you'll be more than prepared when

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exam day comes. Questions are provided in digital flashcard format (aquestion followed by a single correct answer). You can use theflashcards to reinforce your learning and provide last-minute test prepbefore the exam.Other Study ToolsA glossary of key terms from this book isavailable as a fully searchable PDF.Go to www.wiley.com/go/sybextestprep to register andgain access to this interactive online learning environment and testbank with study tools.Exam ObjectivesThe CCNP ENCOR exam is intended for people who have experienceimplementing enterprise network technologies including IPv4 andIPv6 architecture, virtualization, monitoring, security, andautomation. In general, you should have the following before takingthe exam:A minimum of two years of hands-on experience configuring andtroubleshooting routers and switchesAbility to design and configure a network based on customerrequirementsAbility to provide implementation guidanceA mastery of IPv4 and IPv6The exam covers six different domains, with each domain brokendown into objectives.Objective MapThe following table lists each domain and its weighting in the exam,along with the chapters in the book where that domain's objectives arecovered.

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DomainPercentageof examChapterDomain 1: Architecture15%1.1 Explain the different design principlesused in an enterprise network1, 31.2 Analyze design principles of a WLANdeployment41.3 Differentiate between on-premises andcloud infrastructure deployments111.4 Explain the working principles of theCisco SD-WAN solution111.5 Explain the working principles of theCisco SD-Access solution111.6 Describe concepts of wired and wirelessQoS91.7 Differentiate hardware and softwareswitching mechanisms1Domain 2: Virtualization10%2.1 Describe device virtualizationtechnologies102.2 Configure and verify data pathvirtualization technologies102.3 Describe network virtualization concepts10Domain 3: Infrastructure30%3.1 Layer 21, 2, 33.2 Layer 31, 5, 6, 73.3 Wireless43.4 IP Services3, 8, 12Domain 4: Network Assurance10%4.1 Diagnose network problems using toolssuch as debugs, conditional debugs, trace12

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route, ping, SNMP, and syslog4.2 Configure and verify device monitoringusing syslog for remote logging124.3 Configure and verify NetFlow andFlexible NetFlow124.4 Configure and verifySPAN/RSPAN/ERSPAN124.5 Configure and verify IPSLA124.6 Describe Cisco DNA Center workflows toapply network configuration, monitoring, andmanagement114.7 Configure and verify NETCONF andRESTCONF11Domain 5: Security20%5.1 Configure and verify device access control125.2 Configure and verify infrastructuresecurity features125.3 Describe REST API security115.4 Configure and verify wireless securityfeatures4, 125.5 Describe the components of networksecurity design4, 12Domain 6: Automation15%6.1 Interpret basic Python components andscripts116.2 Construct valid JSON encoded file116.3 Describe the high-level principles andbenefits of a data modeling language, such asYANG116.4 Describe APIs for Cisco DNA Center andvManage116.5 Interpret REST API response codes and11

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results in payload using Cisco DNA Centerand RESTCONF6.6 Construct EEM applet to automateconfiguration, troubleshooting, or datacollection116.7 Compare agent vs. agentless orchestrationtools, such as Chef, Puppet, Ansible, andSaltStack11Assessment Test1. IP depends on which of the following?A. Address Resolution ProtocolB. Data link layerC. Network layerD. Transport layer2. Which isnota function of a bridge?A. Simulating some properties of a shared physical EthernetcableB. MAC-based routingC. Reducing the size of a broadcast domainD. Frame check sequence validation3. What are the purposes of TCP sequence numbers? (Choose two.)A. Error controlB. OrderingC. Flow controlD. Reliable delivery4. Three switches are connected via 802.1Q trunk links. You need toprevent VLAN 25 traffic from reaching two of the switches. Which

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of the following can accomplish this? (Choose two.)A. Prune VLAN 25 on the trunk links.B. Use routed interfaces instead of trunks.C. Configure Spanning Tree to block the ports to the switches.D. Delete VLAN 25 on the switches.5. Switch SW1 is running RPVST+ and is connected via a routedinterface to SW2, which is running Multiple Spanning Tree. If youadd VLAN 2 to both switches and map VLAN 2 to MST1 on SW2,which switch will necessarily be the root for VLAN 2?A. SW1B. SW2C. The switch with the lowest bridge priorityD. Both SW1 and SW26. Which of the following can effectively prune a VLAN from atrunk?A. BPDU GuardB. BPDU FilterC. Loop GuardD. UDLD7. Which of the following is the most scalable physical architecturefor East-West traffic patterns?A. Two-tier collapsed coreB. Leaf-and-spine architectureC. RoutedD. Three-tier8. What are two reasons to choose a routed topology over a switchedtopology?A. Better scalability

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B. Better use of IP address spaceC. The ability to stretch subnetsD. Faster convergence9. Which protocol does not use multicast?A. LACPB. EtherChannelC. VRRPD. HSRP10. An access point running in lightweight mode has clientsconnected to two SSIDs. The total number of connected clients is25. How many CAPWAP tunnels are there between the AP and itsWLAN controller (WLC)?A. 1B. 2C. 25D. Lightweight mode doesn't use a WLC.11. A client performs an intra-controller roam, keeping its IP address.Which of the following is true of this roam?A. The SSID changes.B. The VLAN changes.C. It's a layer 2 roam.D. It's a layer 3 roam.12. What are two disadvantages of 5 GHz Wi-Fi versus 2.4 GHz Wi-Fi?A. Incompatibility with 802.11gB. Incompatibility with 802.11nC. Increased free space path lossD. Lower throughput

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13. There are three OSPF routers connected to the same subnet.Which is the designated router?A. The one with the lowest router IDB. The first one that became activeC. The one with the highest router IDD. The one with the highest priority14. Two OSPF routers are connected to each other. One router'sinterface is configured as a broadcast network type, whereas theother router's interface is configured as a point-to-point networktype. Which of the following is true of this configuration? (Choosetwo.)A. They won't form an adjacency.B. They will form an adjacency.C. They won't exchange routes.D. They will exchange routes.15. You have a router with an interface that's connected to a subnetdedicated to servers. You want to advertise this subnet into OSPFbut don't want any servers running OSPF software to form anadjacency with the router. How can you accomplish this?A. Configure null authentication.B. Use a distribute list.C. Advertise a default route.D. Configure the interface as a passive interface.16. An OSPF autonomous system boundary router (ASBR) isredistributing the prefix 192.168.0.0/16 into EIGRP AS 1. What isthe administrative distance of the route?A. 20B. 110C. 170

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