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CCNP Enterprise Certification Study Guide (2020)

CCNP Enterprise Certification Study Guide (2020) is the ultimate study tool to help you pass your exam on the first try.

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    CCNP ® Enterprise Certification Study Guide Ben Piper

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    Copyright © 2020 by John Wiley & Sons, Inc., Indianapolis, Indiana ISBN: 978-1-119-65875-7 ISBN: 978-1-119-65882-5 (ebk.) ISBN: 978-1-119-65880-1 (ebk.) Manufactured in the United States of America No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 6468600. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online at http://www.wiley.com/go/permissions. Limit of Liability/Disclaimer of Warranty: The publisher and the author make no representations or warranties with respect to the accuracy or completeness of the contents of this work and specifically disclaim all warranties, including without limitation warranties of fitness for a particular purpose. No warranty may be created or extended by sales or promotional materials. The advice and strategies contained herein may not be suitable for every situation. This work is sold with the understanding that the publisher is not engaged in rendering legal, accounting, or other professional services. If professional assistance is required, the services of a competent professional person should be sought. Neither the publisher nor the author shall be liable for damages arising herefrom. The fact that an organization or Web site is referred to in this work as a citation and/or a potential source of further information does not mean that the author or the publisher endorses the information the organization or Web site may provide or recommendations it may make. Further, readers should be aware that Internet Web sites listed in this work may have changed or disappeared between 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 the U.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. Some material included with standard print versions of this book may not be included in e-books or in print-on-demand. If this book refers to media such as a CD or DVD that is not included in the 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: 2020935632 TRADEMARKS: Wiley, the Wiley logo, and the Sybex logo are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates, in the United States and other countries, and may not be used without written permission. CCNP is a registered trademark of Cisco Technology, Inc. All other trademarks are the property of their respective owners. John Wiley & 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 things were created and in Whom all things hold together

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    Acknowledgments I’d like to thank the following people who helped create this CCNP Enterprise Certification Study Guide : Exam 350-401 . A special thanks to Kenyon Brown, senior acquisitions editor, for the opportunity to write this book. Thanks to John Sleeva, project editor, for pushing me to meet my deadlines. His suggestions and edits helped make this book more user friendly. Thanks also go to Christine O’Connor, production editor; Pete Gaughan, content enablement manager; and Louise Watson at Word One, proofreader. Jon Buhagiar reviewed the chapters and questions for technical accuracy. His comments guided by his expertise helped make this book more practical, accurate, and well rounded.

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    About the Author Ben Piper is a networking and cloud consultant who has authored multiple books including the AWS Certified Solutions Architect Study Guide: Associate SAA-C01 Exam, Second Edition (Sybex, 2019), AWS Certified Cloud Practitioner Study Guide: Foundational CLF-C01 Exam (Sybex, 2019), and Learn Cisco Network Administration in a Month of Lunches (Manning, 2017). You can contact Ben by visiting his website https://benpiper.com.

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    CONTENTS Cover Acknowledgments About the Author Introduction What Does This Book Cover? Interactive Online Learning Environment and Test Bank Exam Objectives Objective Map Assessment Test Answers to Assessment Test Chapter 1: Networking Fundamentals The OSI Model Layer 1: The Physical Layer Layer 2: The Data Link Layer Layer 3: The Network Layer Layer 4: The Transport Layer Summary Exam Essentials Review Questions Chapter 2: Spanning Tree Protocols The Need for Spanning Tree VLANs and Trunking Rapid Per-VLAN Spanning Tree Multiple Spanning Tree Spanning Tree Extensions Summary Exam Essentials

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    Exercises Review Questions Chapter 3: Enterprise Network Design Physical Network Architectures Layer 2 Design EtherChannels First-Hop Redundancy Protocols Summary Exam Essentials Review Questions Chapter 4: Wireless LAN (WLAN) Radio Frequency Fundamentals WLAN 802.11 Standards Access Point Modes Roaming and Location Services Summary Exam Essentials Review Questions Chapter 5: Open Shortest Path First (OSPF) Link-State Advertisements Neighbor Operations Configuring OSPF Summary Exam Essentials Exercises Review Questions Chapter 6: Enhanced Interior Gateway Routing Protocol (EIGRP) EIGRP Fundamentals Configuring EIGRP

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    Summary Exam Essentials Exercises Review Questions Chapter 7: The Border Gateway Protocol (BGP) BGP Fundamentals Configuring BGP Summary Exam Essentials Exercises Review Questions Chapter 8: Network Address Translation and Multicast Network Address Translation Multicast Summary Exam Essentials Exercises Review Questions Chapter 9: Quality of Service Understanding Quality of Service Classification and Marking Policing Queuing Shaping Summary Exam Essentials Exercises Review Questions Chapter 10: Network Virtualization

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    Virtual Machines, Hypervisors, and Network Virtualization Generic Routing Encapsulation Tunnels IP Security Location/ID Separation Protocol Virtual Extensible Local Area Network Virtual Routing and Forwarding Summary Exam Essentials Exercises Review Questions Chapter 11: Software-Defined Networking and Network Programmability What Is Software-Defined Networking? Software-Defined Access Software-Defined WAN Network Programmability and Automation Summary Exam Essentials Exercises Review Questions Chapter 12: Network Security and Monitoring Infrastructure Security Cisco Security Products Wireless Security Monitoring Summary Exam Essentials Exercises Review Questions

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    Appendix Answers to Review Questions Chapter 1: Networking Fundamentals Chapter 2: Spanning Tree Protocols Chapter 3: Enterprise Network Design Chapter 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 Multicast Chapter 9: Quality of Service Chapter 10: Network Virtualization Chapter 11: Software-Defined Networking and Network Programmability Chapter 12: Network Security and Monitoring Index Online Test Bank End User License Agreement List of Tables Chapter 1 Table 1.1 Table 1.2 Table 1.3 Chapter 2 Table 2.1 Chapter 3 Table 3.1

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

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    Figure 1.4 Early Ethernet over a shared medium compared to Ethernet using a swit... Figure 1.5 Simple layer 2 and layer 3 topologies Figure 1.6 Layered representation of the network Figure 1.7 Encapsulation of a TCP segment and IP packet inside an Ethernet frame... Chapter 2 Figure 2.1 Physical looped topology Figure 2.2 Converged STP topology with SW1 as the root Figure 2.3 Multiple VLANs over 802.1Q trunks Figure 2.4 Converged STP topology with SW3 as the new root Figure 2.5 VLAN 1 topology with SW3 as root Figure 2.6 Converged VLAN 1 topology with SW2 Gi1/0 ... Figure 2.7 Multiple Spanning Tree Figure 2.8 Physical topology for Exercise 2.1 Chapter 3 Figure 3.1 East-West traffic flow in a data center network using the leaf... Figure 3.2 Core, distribution, and access tiers Figure 3.3 Two access-distribution blocks connected to the core Figure 3.4 Collapsed core Figure 3.5 Switched vs. routed topology Figure 3.6 A looped triangle topology Figure 3.7 A looped square topology Figure 3.8 Recommended loop-free topology Figure 3.9 Loop-free U-topology

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    Figure 3.10 Loop-free inverted-U topology Figure 3.11 Virtual switch topology Figure 3.12 Routed access topology Figure 3.13 EtherChannel between SW3 and SW4 Chapter 4 Figure 4.1 Representation of radio wave at 10 Hz with an amplitude of 1... Figure 4.2 Amplitude decreases with the square of the distance. Chapter 5 Figure 5.1 An OSPF topology Figure 5.2 Layer 2 topology Chapter 6 Figure 6.1 Simple EIGRP topology Figure 6.2 EIGRP weighted metric formula Figure 6.3 EIGRP layer 3 topology Figure 6.4 Layer 2 topology Chapter 7 Figure 7.1 BGP peers in different autonomous systems Figure 7.2 Route propagation and loop prevention among BGP neighbors in... Figure 7.3 Layer 3 topology using BGP, OSPF, and EIGRP Chapter 8 Figure 8.1 Inside versus outside networks Figure 8.2 Static NAT Figure 8.3 Layer 3 topology Figure 8.4 Layer 2 topology

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    Figure 8.5 Multicast topology Chapter 9 Figure 9.1 Setting a QoS profile Figure 9.2 The Platinum QoS profile Chapter 10 Figure 10.1 L2 VM-to-VM traffic using a virtual switching... Figure 10.2 L2 VM-to-switch traffic using a virtual switc... Figure 10.3 L3 VM-to-VM traffic using a virtual switch an... Figure 10.4 L2 VM-to-VM traffic switched internally using... Figure 10.5 L2 VM-to-VM traffic switched externally using... Figure 10.6 Underlay topology running BGP. R1 (AS 65001) and R2 (AS 650... Figure 10.7 GRE topology Figure 10.8 Using LISP for IP mobility Figure 10.9 VXLAN flood-and-learn configuration using mul... Figure 10.10 VRF topology Chapter 11 Figure 11.1 Scalable groups in Cisco DNA Center Figure 11.2 Group-based access control policies in Cisco DNA Center Figure 11.3 Network Settings page under the Design workflow of Cisco DNA Center Figure 11.4 Inventory page under the Provision workflow of Cisco DNA Center

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    Figure 11.5 Fabric Infrastructure page under the Provision workflow of Cisco DNA... Figure 11.6 Fabric Host Onboarding page under the Provision workflow of Cisco DN... Figure 11.7 The Overall Health dashboard in the Assurance workflow of Cisco DNA ... Figure 11.8 The Application Health dashboard in the Assurance workflow of Cisco ... Figure 11.9 The Client Health dashboard in the Assurance workflow of Cisco DNA C... Figure 11.10 The vManage Network Management System web interface Chapter 12 Figure 12.1 Example network topology Figure 12.2 WebAuth login page configuration Figure 12.3 WLAN list Figure 12.4 WLAN layer 2 configuration Figure 12.5 RADIUS server configuration Figure 12.6 AAA server configuration Figure 12.7 WLAN WPA2 and 802.1X configuration Figure 12.8 Specifying security and encryption authentication method Figure 12.9 Specifying user authentication mode Figure 12.10 Setting a WPA/WPA2 preshared key

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    Introduction Networking is uniquely challenging in that it's not a single technology, but a collection of interdependent technologies that every other aspect of IT depends on. Without networking, there are no connected applications and that means there are no IT employees. Even if you're not 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, and cloud computing. Cisco's Professional Network Certifications In 2019, Cisco announced updates to its Cisco Certified Network Professional (CCNP) certification program. There are six professional level certifications to choose from: CCNP Enterprise CCNP Data Center CCNP Security CCNP Service Provider CCNP Collaboration Cisco Certified DevNet Professional Each certification requires passing one core exam and one concentration exam. The core exam for the CCNP Enterprise certification is 350-401 ENCOR, “Implementing Cisco Enterprise Network Core Technologies.” The concentration exams let you focus on a specific specialty, such as routing, wireless, network design, automation, or software-defined networking (SDN). Regardless of the concentration exam you choose, you must pass the ENCOR exam to attain your CCNP Enterprise certification. Is CCNP Certification Right for You?

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    Many who attain the Cisco Certified Network Associate (CCNA) don't go on to pursue more advanced Cisco certifications. So why should you consider the CCNP Enterprise certification, and is it right for you? It may be right for you if You have a passion for networking. You want to set yourself apart as someone who has a passion for technology and isn't just in it for the money (although there is plenty of that!). You want to specialize in security, wireless, network automation, cloud, or software-defined networking. You enjoy tweaking the “nerd knobs” on individual technologies just to see what will happen. You love facing and overcoming the challenges of troubleshooting. Study Tips Before taking the CCNP ENCOR exam, there are a few things to keep in 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 have helped me pass several Cisco certification exams on the first try. One of the neglected skills required on any Cisco exam is speed. Being able to troubleshoot a 10-router Open Shortest Path First (OSPF) topology is good. Taking 15 minutes to do it is not so good. I can't stress enough the importance of spending quality time with the command-line interface (CLI). You should spend at least 50 percent of your study time on configuring and troubleshooting a variety of topologies and technologies. 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 your best friend. Understanding networking requires making connections that aren't always obvious, and the more you practice and study, the more opportunities your mind has to make those connections. For years 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 the information you've already retained, and it doesn't waste time continuing to quiz you on it. That means you can safely load your collection with hundreds of items while still using your time efficiently. One last tip: As you read this study guide cover to cover, keep a running list of questions and things you're not sure about. Chances are if you find something confusing, a lot of other people did too, and that makes it good fodder for the exam. Be sure to visit https://benpiper.com/encor for book resources, updates, and errata. Prerequisites and Lab Requirements The CCNA certification isn't required to attain the CCNP Enterprise certification. Nevertheless, I strongly recommend that you obtain your CCNA certification or the equivalent experience before embarking on your 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 topics you should already be familiar with. Because the CCNP Enterprise is a professional-level certification, I don't review some of the basics covered by the CCNA such as subnetting, IPv4, and IPv6 addressing. You'll need a virtual or physical lab, which you should already have from your previous networking studies. Your lab should be able to support at least eight routers and two layer 3 switches running IOS version 15.2 or later. You should be able to configure your lab on your own by looking at layer 2 and layer 3 diagrams. Topology diagrams will be included in each chapter. If your existing lab doesn't meet the requirement, Cisco Virtual Internet Routing Lab (http://virl.cisco.com) includes virtual machine images for a variety of switches and routers. These images are virtual machines that run using QEMU and are light on CPU and memory, so you don't need a beast of a server to run simulations, although more resources 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 Book Hands-on experience is crucial for exam success. Each chapter in this study guide contains hands-on exercises that you should strive to complete during or immediately after your reading of the chapter. The exercises are there to test your understanding, and not to cover every possible permutation of configurations. The exercises are your foundation, and you should build on them by experimenting with them, breaking things, and then figuring out how to fix them. Each chapter contains review questions to thoroughly test your understanding of the services and concepts covered in that chapter. They also test your ability to integrate the concepts with information from preceding chapters. I've designed the questions to help you realistically gauge your understanding and identify your blind spots. Once you complete the assessment in each chapter, referring to the answer key will give you not only the correct answers but a detailed explanation as to why they're correct. Even if you feel comfortable on a certain topic, resist the urge to skip over the pertinent chapter. I strongly encourage you to carefully read this book from cover to cover so that you can discover your strengths and weaknesses—particularly the ones you may not be aware of. Remember, even though you can't learn networking just by reading a book, it's equally true that you can't learn without reading a book. The book also contains a self-assessment exam with 36 questions, two practice exams with 50 questions each to help you gauge your readiness to take the exam, and flashcards to help you learn and retain key 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 CCNP ENCOR exam: Chapter 1: Networking Fundamentals This chapter overviews the fundamentals of networking theory and network design. Chapter 2: Spanning Tree Protocols This chapter covers Spanning Tree protocols, including Rapid Spanning Tree and Multiple Instance Spanning Tree. We also cover VLANs, trunking, and pruning. Chapter 3: Enterprise Network Design In this chapter, you'll learn the advantages and disadvantages of different physical and layer 2 network designs. We also dive into EtherChannels and first-hop redundancy protocols. Chapter 4: Wireless LAN (WLAN) This chapter explains the fundamentals of radio frequency, WLAN 802.11 standards, wireless security, and WLAN controller (WLC) design and deployment considerations. 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, including redistribution, multipathing, and path control. Chapter 7: The Border Gateway Protocol (BGP) In this chapter, you'll learn all about BGP, including path selection, redistribution, summarization, and filtering. Chapter 8: Network Address Translation and Multicast This two-for-the-price-of-one chapter gives you complete coverage of network address translation and multicast. Chapter 9: Quality of Service This chapter covers QoS concepts, including queuing, policing, shaping, and classification.

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    Chapter 10: Network Virtualization This chapter dives deep into virtualization concepts such as server virtualization, network virtualization, generic routing encapsulation, IPsec, LISP, and VXLAN. Chapter 11: Software-Defined Networking and Network Programmability In this chapter, you'll learn about Cisco's software-defined networking (SDN) solutions, SD-Access, Cisco DNA Center, and SD-WAN. You'll also learn about network automation tools such as Python, RESTCONF, NETCONF, Ansible, Chef, Puppet, and SaltStack. Chapter 12: Network Security and Monitoring This chapter will show you how to implement infrastructure security best practices and wireless security configurations. You'll also learn about Cisco security products and how to monitor your network using NetFlow, IPSLA, debugs, Syslog, SNMP, and more. Interactive Online Learning Environment and Test Bank The interactive online learning environment that accompanies this CCNP Enterprise Certification Study Guide: Exam 350-401 provides a test bank with study tools to help you prepare for the certification exam—and increase your chances of passing it the first time! The test bank includes the following: Sample Tests All the questions in this book are provided, including the assessment test at the end of this introduction and the chapter tests that include the review questions at the end of each chapter. In addition, there are two practice exams with 50 questions each. Use these questions to test your knowledge of the study guide material. The online test bank runs on multiple devices. Flashcards The online text banks include 100 flashcards specifically written to hit you hard, so don't get discouraged if you don't ace your way through them at first. They're there to ensure that you're really ready 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 (a question followed by a single correct answer). You can use the flashcards to reinforce your learning and provide last-minute test prep before the exam. Other Study Tools A glossary of key terms from this book is available as a fully searchable PDF. Go to www.wiley.com/go/sybextestprep to register and gain access to this interactive online learning environment and test bank with study tools. Exam Objectives The CCNP ENCOR exam is intended for people who have experience implementing enterprise network technologies including IPv4 and IPv6 architecture, virtualization, monitoring, security, and automation. In general, you should have the following before taking the exam: A minimum of two years of hands-on experience configuring and troubleshooting routers and switches Ability to design and configure a network based on customer requirements Ability to provide implementation guidance A mastery of IPv4 and IPv6 The exam covers six different domains, with each domain broken down into objectives. Objective Map The following table lists each domain and its weighting in the exam, along with the chapters in the book where that domain's objectives are covered.

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    Domain Percentage of exam Chapter Domain 1: Architecture 15% 1.1 Explain the different design principles used in an enterprise network 1, 3 1.2 Analyze design principles of a WLAN deployment 4 1.3 Differentiate between on-premises and cloud infrastructure deployments 11 1.4 Explain the working principles of the Cisco SD-WAN solution 11 1.5 Explain the working principles of the Cisco SD-Access solution 11 1.6 Describe concepts of wired and wireless QoS 9 1.7 Differentiate hardware and software switching mechanisms 1 Domain 2: Virtualization 10% 2.1 Describe device virtualization technologies 10 2.2 Configure and verify data path virtualization technologies 10 2.3 Describe network virtualization concepts 10 Domain 3: Infrastructure 30% 3.1 Layer 2 1, 2, 3 3.2 Layer 3 1, 5, 6, 7 3.3 Wireless 4 3.4 IP Services 3, 8, 12 Domain 4: Network Assurance 10% 4.1 Diagnose network problems using tools such as debugs, conditional debugs, trace 12

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    route, ping, SNMP, and syslog 4.2 Configure and verify device monitoring using syslog for remote logging 12 4.3 Configure and verify NetFlow and Flexible NetFlow 12 4.4 Configure and verify SPAN/RSPAN/ERSPAN 12 4.5 Configure and verify IPSLA 12 4.6 Describe Cisco DNA Center workflows to apply network configuration, monitoring, and management 11 4.7 Configure and verify NETCONF and RESTCONF 11 Domain 5: Security 20% 5.1 Configure and verify device access control 12 5.2 Configure and verify infrastructure security features 12 5.3 Describe REST API security 11 5.4 Configure and verify wireless security features 4, 12 5.5 Describe the components of network security design 4, 12 Domain 6: Automation 15% 6.1 Interpret basic Python components and scripts 11 6.2 Construct valid JSON encoded file 11 6.3 Describe the high-level principles and benefits of a data modeling language, such as YANG 11 6.4 Describe APIs for Cisco DNA Center and vManage 11 6.5 Interpret REST API response codes and 11

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    results in payload using Cisco DNA Center and RESTCONF 6.6 Construct EEM applet to automate configuration, troubleshooting, or data collection 11 6.7 Compare agent vs. agentless orchestration tools, such as Chef, Puppet, Ansible, and SaltStack 11 Assessment Test 1. IP depends on which of the following? A. Address Resolution Protocol B. Data link layer C. Network layer D. Transport layer 2. Which is not a function of a bridge? A. Simulating some properties of a shared physical Ethernet cable B. MAC-based routing C. Reducing the size of a broadcast domain D. Frame check sequence validation 3. What are the purposes of TCP sequence numbers? (Choose two.) A. Error control B. Ordering C. Flow control D. Reliable delivery 4. Three switches are connected via 802.1Q trunk links. You need to prevent 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 routed interface to SW2, which is running Multiple Spanning Tree. If you add VLAN 2 to both switches and map VLAN 2 to MST1 on SW2, which switch will necessarily be the root for VLAN 2? A. SW1 B. SW2 C. The switch with the lowest bridge priority D. Both SW1 and SW2 6. Which of the following can effectively prune a VLAN from a trunk? A. BPDU Guard B. BPDU Filter C. Loop Guard D. UDLD 7. Which of the following is the most scalable physical architecture for East-West traffic patterns? A. Two-tier collapsed core B. Leaf-and-spine architecture C. Routed D. Three-tier 8. What are two reasons to choose a routed topology over a switched topology? A. Better scalability

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    B. Better use of IP address space C. The ability to stretch subnets D. Faster convergence 9. Which protocol does not use multicast? A. LACP B. EtherChannel C. VRRP D. HSRP 10. An access point running in lightweight mode has clients connected to two SSIDs. The total number of connected clients is 25. How many CAPWAP tunnels are there between the AP and its WLAN controller (WLC)? A. 1 B. 2 C. 25 D. 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 802.11g B. Incompatibility with 802.11n C. Increased free space path loss D. 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 ID B. The first one that became active C. The one with the highest router ID D. The one with the highest priority 14. Two OSPF routers are connected to each other. One router's interface is configured as a broadcast network type, whereas the other router's interface is configured as a point-to-point network type. Which of the following is true of this configuration? (Choose two.) 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 subnet dedicated to servers. You want to advertise this subnet into OSPF but don't want any servers running OSPF software to form an adjacency 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) is redistributing the prefix 192.168.0.0/16 into EIGRP AS 1. What is the administrative distance of the route? A. 20 B. 110 C. 170

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