CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guidee

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Trust the best-selling Official Cert Guide series from Cisco Press to help you learn, prepare, and practice for exam success. They are built with the objective of providing assessment, review, and practice to help ensure you are fully prepared for your certification exam. * Master Cisco CCNP/CCIE ENCOR exam topics * Assess your knowledge with chapter-opening quizzes * Review key concepts with exam preparation tasks

This is the eBook edition of the CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guide. This eBook does not include access to the Pearson Test Prep practice exams that comes with the print edition.
CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guide presents you with an organized test preparation routine through the use of proven series elements and techniques. "Do I Know This Already?" quizzes open each chapter and enable you to decide how much time you need to spend on each section. Exam topic lists make referencing easy. Chapter-ending Exam Preparation Tasks help you drill on key concepts you must know thoroughly.
CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guide focuses specifically on the objectives for the Cisco CCNP/CCIE ENCOR 350-401 exam. Networking experts Brad Edgeworth, Ramiro Garza Rios, Dave Hucaby, and Jason Gooley share preparation hints and test-taking tips, helping you identify areas of weakness and improve both your conceptual knowledge and hands-on skills. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics.
This complete study package includes
* A test-preparation routine proven to help you pass the exams * Do I Know This Already? quizzes, which enable you to decide how much time you need to spend on each section * Chapter-ending exercises, which help you drill on key concepts you must know thoroughly * Practice exercises that help you enhance your knowledge * More than 90 minutes of video mentoring from the author * A final preparation chapter, which guides you through tools and resources to help you craft your review and test-taking strategies * Study plan suggestions and templates to help you organize and optimize your study time
Well regarded for its level of detail, assessment features, comprehensive design scenarios, and challenging review questions and exercises, this official study guide helps you master the concepts and techniques that will enable you to succeed on the exam the first time.
The official study guide helps you master all the topics on the CCNP/CCIE ENCOR exam, including * Enterprise network architecture * Virtualization * Network assurance * Security * Automation


Brad Edgeworth, CCIE No. 31574 (R&S and SP), is a systems architect at Cisco Systems. Brad is a distinguished speaker at Cisco Live, where he has presented on various topics. Before joining Cisco, Brad worked as a network architect and consultant for various Fortune 500 companies. Brad's expertise is based on enterprise and service provider environments, with an emphasis on architectural and operational simplicity. Brad holds a bachelor of arts degree in computer systems management from St. Edward's University in Austin, Texas. Brad can be found on Twitter as @BradEdgeworth.

Ramiro Garza Rios, CCIE No. 15469 (R&S, SP, and Security), is a solutions architect in the Cisco Customer Experience (CX) organization. His expertise is on enterprise and service provider network environments, with a focus on evolving architectures and nextgeneration technologies. He is also a Cisco Live distinguished speaker. Ramiro recently concluded a multi-year Cisco ACI project for one of the top three Tier 1 ISPs in the United States.

Before joining Cisco Systems in 2005, he was a network consulting and presales engineer for a Cisco Gold Partner in Mexico, where he planned, designed, and implemented both enterprise and service provider networks.

David Hucaby, CCIE No. 4594 (R&S), CWNE No. 292, is a lead network engineer for the University of Kentucky Healthcare, where he focuses on wireless networks in a large medical environment. David holds bachelor's and master's degrees in electrical engineering from the University of Kentucky. He has been authoring Cisco Press titles for 20 years.

Jason Gooley, CCIE No. 38759 (R&S and SP), is a very enthusiastic and spontaneous person who has more than 20 years of experience in the industry. Currently, Jason works as a technical solutions architect for the Worldwide Enterprise Networking Sales team at Cisco Systems. Jason is very passionate about helping others in the industry succeed. In addition to being a Cisco Press author, Jason is a distinguished speaker at Cisco Live, contributes to the development of the Cisco CCIE and DevNet exams, provides training for Learning@Cisco, is an active CCIE mentor, is a committee member for the Cisco Continuing Education Program (CE), and is a program committee member of the Chicago Network Operators Group (CHI-NOG), Jason also hosts a show called MetalDevOps. Jason can be found at, @MetalDevOps, and @Jason_Gooley on all social media platforms.



Part I Forwarding

Chapter 1 Packet Forwarding

"Do I Know This Already?" Quiz 2

Foundation Topics 3

Network Device Communication 3

Layer 2 Forwarding 4

Layer 3 Forwarding

Forwarding Architectures

Process Switching

Software CEF

Hardware CEF

Stateful Switchover

SDM Templates

Exam Preparation Tasks

Part II Layer 2

Chapter 2 Spanning Tree Protocol

"Do I Know This Already?" Quiz

Foundation Topics

Spanning Tree Protocol Fundamentals


Building the STP Topology

STP Topology Changes

Rapid Spanning Tree Protocol

RSTP (802.1W) Port States

RSTP (802.1W) Port Roles

RSTP (802.1W) Port Types

Building the RSTP Topology

Exam Preparation Tasks

Chapter 3 Advanced STP Tuning

"Do I Know This Already?" Quiz

Foundation Topics

STP Topology Tuning

Root Bridge Placement

Modifying STP Root Port and Blocked Switch Port Locations

Modifying STP Port Priority

Additional STP Protection Mechanisms

Root Guard

STP Portfast

BPDU Guard

BPDU Filter

Problems with Unidirectional Links

Exam Preparation Tasks

Chapter 4 Multiple Spanning Tree Protocol

"Do I Know This Already?" Quiz

Foundation Topics

Multiple Spanning Tree Protocol

MST Instances (MSTIs)

MST Configuration

MST Verification

MST Tuning

Common MST Misconfigurations

MST Region Boundary

Exam Preparation Tasks

Chapter 5 VLAN Trunks and EtherChannel Bundles

"Do I Know This Already?" Quiz

Foundation Topics

VLAN Trunking Protocol

VTP Communication

VTP Configuration

VTP Verification

Dynamic Trunking Protocol

EtherChannel Bundle

Dynamic Link Aggregation Protocols

Verifying Port-Channel Status

Viewing EtherChannel Neighbors

Verifying EtherChannel Packets

Advanced LACP Configuration Options

Troubleshooting EtherChannel Bundles

Load Balancing Traffic with EtherChannel Bundles

Exam Preparation Tasks

Part III Routing

Chapter 6 IP Routing Essentials

"Do I Know This Already?" Quiz

Foundation Topics

Routing Protocol Overview

Distance Vector Algorithms

Enhanced Distance Vector Algorithms

Link-State Algorithms

Path Vector Algorithm

Path Selection

Prefix Length

Administrative Distance


Static Routing

Static Route Types

Floating Static Routing

Static Null Routes

IPv6 Static Routes

Virtual Routing and Forwarding

Exam Preparation Tasks

Chapter 7 EIGRP

"Do I Know This Already?" Quiz

Foundation Topics

EIGRP Fundamentals

Autonomous Systems

EIGRP Terminology

Topology Table

EIGRP Neighbors

Path Metric Calculation

Wide Metrics

Metric Backward Compatibility

Load Balancing

Failure Detection and Timers


Route Summarization

Exam Preparation Tasks

Chapter 8 OSPF

"Do I Know This Already?" Quiz

Foundation Topics

OSPF Fundamentals

Inter-Router Communication

OSPF Hello Packets

Router ID


Designated Router and Backup Designated Router

OSPF Configuration

OSPF Network Statement

Interface-Specific Configuration

Statically Setting the Router ID

Passive Interfaces

Requirements for Neighbor Adjacency

Sample Topology and Configuration

Confirmation of Interfaces

Verification of OSPF Neighbor Adjacencies

Verification of OSPF Routes

Default Route Advertisement

Common OSPF Optimizations

Link Costs

Failure Detection

DR Placement

OSPF Network Types

Exam Preparation Tasks

Chapter 9 Advanced OSPF

"Do I Know This Already?" Quiz

Foundation Topics


Area ID

OSPF Route Types

Link-State Announcements

LSA Sequences

LSA Age and Flooding

LSA Types

Discontiguous Networks

OSPF Path Selection

Intra-Area Routes

Interarea Routes

Equal-Cost Multipathing

Summarization of Routes

Summarization Fundamentals

Interarea Summarization

Summarization Metrics

Configuration of Interarea Summarization

Route Filtering

Filtering with Summarization

Area Filtering

Local OSPF Filtering

Exam Preparation Tasks

Chapter 10 OSPFv3

"Do I Know This Already?" Quiz

Foundation Topics

OSPFv3 Fundamentals

OSPFv3 Link-State Advertisement

OSPFv3 Communication

OSPFv3 Configuration

OSPFv3 Verification

Passive Interface


Network Type

IPv4 Support in OSPFv3

Exam Preparation Tasks

Chapter 11 BGP

"Do I Know This Already?" Quiz

Foundation Topics

BGP Fundamentals

Autonomous System Numbers

Path Attributes

Loop Prevention

Address Families

Inter-Router Communication

BGP Neighbor States

Basic BGP Configuration

Verification of BGP Sessions

Prefix Advertisement

Receiving and Viewing Routes

BGP Route Advertisements from Indirect Sources

Route Summarization

Aggregate Address

Atomic Aggregate

Route Aggregation with AS_SET

Multiprotocol BGP for IPv6

IPv6 Configuration

IPv6 Summarization

Exam Preparation Tasks

Chapter 12 Advanced BGP

"Do I Know This Already?" Quiz

Foundation Topics

BGP Multihoming

Resiliency in Service Providers

Internet Transit Routing

Branch Transit Routing

Conditional Matching

Access Control Lists

Prefix Matching

Regular Expressions (regex)

Route Maps

Conditional Matching

Optional Actions

The continue Keyword

BGP Route Filtering and Manipulation

Distribute List Filtering

Prefix List Filtering

AS Path ACL Filtering

Route Maps

Clearing BGP Connections

BGP Communities

Well-Known Communities

Enabling BGP Community Support

Conditionally Matching BGP Communities

Setting Private BGP Communities

Understanding BGP Path Selection

Routing Path Selection Using Longest Match

BGP Best Path Overview

Exam Preparation Tasks

Chapter 13 Multicast

"Do I Know This Already?" Quiz

Foundation Topics

Multicast Fundamentals

Multicast Addressing

Layer 2 Multicast Addresses

Internet Group Management Protocol



IGMP Snooping

Protocol Independent Multicast

PIM Distribution Trees

PIM Terminology

PIM Dense Mode

PIM Sparse Mode

Reverse Path Forwarding

PIM Forwarder

Rendezvous Points

Static RP


PIM Bootstrap Router

Exam Preparation Tasks

Part IV Services

Chapter 14 QoS

"Do I Know This Already?" Quiz

Foundation Topics

The Need for QoS

Lack of Bandwidth

Latency and Jitter

Packet Loss

QoS Models

Classification and Marking



DSCP Per-Hop Behaviors

Scavenger Class

Trust Boundary

A Practical Example: Wireless QoS

Policing and Shaping

Placing Policers and Shapers in the Network


Token Bucket Algorithms

Types of Policers

Congestion Management and Avoidance

Congestion Management

Congestion-Avoidance Tools

Exam Preparation Tasks

Chapter 15 IP Services

"Do I Know This Already?" Quiz

Foundation Topics

Time Synchronization

Network Time Protocol

NTP Configuration

Stratum Preference

NTP Peers

First-Hop Redundancy Protocol

Object Tracking

Hot Standby Router Protocol

Virtual Router Redundancy Protocol

Global Load Balancing Protocol

Network Address Translation

NAT Topology

Static NAT

Pooled NAT

Port Address Translation

Exam Preparation Tasks

Part V Overlay

Chapter 16 Overlay Tunnels

"Do I Know This Already?" Quiz

Foundation Topics

Generic Routing Encapsulation (GRE) Tunnels

GRE Tunnel Configuration

GRE Configuration Example

Problems with Overlay Networks: Recursive Routing

IPsec Fundamentals

Authentication Header

Encapsulating Security Payload

Transform Sets

Internet Key Exchange

IPsec VPNs

Site-to-Site IPsec Configuration

Cisco Location/ID Separation Protocol (LISP)

LISP Architecture and Protocols

LISP Operation

Virtual Extensible Local Area Network (VXLAN)

Exam Preparation Tasks

Part VI Wireless

Chapter 17 Wireless Signals and Modulation

"Do I Know This Already?" Quiz

Foundation Topics

Understanding Basic Wireless Theory

Understanding Frequency

Understanding Phase

Measuring Wavelength

Understanding RF Power and dB

Carrying Data Over an RF Signal

Maintaining AP-Client Compatibility

Using Multiple Radios to Scale Performance

Maximizing the AP-Client Throughput

Exam Preparation Tasks

Chapter 18 Wireless Infrastructure

"Do I Know This Already?" Quiz

Foundation Topics

Wireless LAN Topologies

Autonomous Topology

Lightweight AP Topologies

Pairing Lightweight APs and WLCs

AP States

Discovering a WLC

Selecting a WLC

Maintaining WLC Availability

Cisco AP Modes

Leveraging Antennas for Wireless Coverage

Radiation Patterns




Omnidirectional Antennas

Directional Antennas

Exam Preparation Tasks

Chapter 19 Understanding Wireless Roaming and Location Services

"Do I Know This Already?" Quiz

Foundation Topics

Roaming Overview

Roaming Between Autonomous APs

Intracontroller Roaming

Roaming Between Centralized Controllers

Layer 2 Roaming

Layer 3 Roaming

Scaling Mobility with Mobility Groups

Locating Devices in a Wireless Network

Exam Preparation Tasks

Chapter 20 Authenticating Wireless Clients

"Do I Know This Already?" Quiz

Foundation Topics

Open Authentication

Authenticating with Pre-Shared Key

Authenticating with EAP

Configuring EAP-Based Authentication with External RADIUS Servers

Configuring EAP-Based Authentication with Local EAP

Verifying EAP-Based Authentication Configuration

Authenticating with WebAuth

Exam Preparation Tasks

Chapter 21 Troubleshooting Wireless Connectivity

"Do I Know This Already?" Quiz

Foundation Topics

Troubleshooting Client Connectivity from the WLC

Checking the Client's Connection Status

Checking the Client's Association and Signal Status

Checking the Client's Mobility State

Checking the Client's Wireless Policies

Testing a Wireless Client

Troubleshooting Connectivity Problems at the AP

Exam Preparation Tasks

Part VII Architecture

Chapter 22 Enterprise Network Architecture

"Do I Know This Already?" Quiz

Foundation Topics

Hierarchical LAN Design Model

Access Layer

Distribution Layer

Core Layer

Enterprise Network Architecture Options

Two-Tier Design (Collapsed Core)

Three-Tier Design

Layer 2 Access Layer (STP Based)

Layer 3 Access Layer (Routed Access)

Simplified Campus Design

Software-Defined Access (SD-Access) Design

Exam Preparation Tasks

Chapter 23 Fabric Technologies

"Do I Know This Already?" Quiz

Foundation Topics

Software-Defined Access (SD-Access)

What Is SD-Access?

SD-Access Architecture

Physical Layer

Controller Layer

Management Layer

Software-Defined WAN (SD-WAN)

Cisco SD-WAN Architecture

vManage NMS

vSmart Controller

Cisco SD-WAN Routers (vEdge and cEdge)

vBond Orchestrator


Cisco SD-WAN Cloud OnRamp

Cloud OnRamp for SaaS

Cloud OnRamp for IaaS

Exam Preparation Tasks

Chapter 24 Network Assurance

Do I Know This Already?

Foundation Topics

Network Diagnostic Tools




Conditional Debugging

Simple Network Management Protocol (SNMP)


NetFlow and Flexible NetFlow

Switched Port Analyzer (SPAN) Technologies

Local SPAN

Specifying the Source Ports


Encapsulated Remote SPAN (ERSPAN)


Cisco DNA Center Assurance

Exam Preparation Tasks

Part VIII Security

Chapter 25 Secure Network Access Control

"Do I Know This Already?" Quiz

Foundation Topics

Network Security Design for Threat Defense

Next-Generation Endpoint Security

Cisco Talos

Cisco Threat Grid

Cisco Advanced Malware Protection (AMP)

Cisco AnyConnect

Cisco Umbrella

Cisco Web Security Appliance (WSA)

Cisco Email Security Appliance (ESA)

Next-Generation Intrusion Prevention System (NGIPS)

Next-Generation Firewall (NGFW)

Cisco Firepower Management Center (FMC)

Cisco Stealthwatch

Cisco Identity Services Engine (ISE)

Network Access Control (NAC)


MAC Authentication Bypass (MAB)

Web Authentication (WebAuth)

Enhanced Flexible Authentication (FlexAuth)

Cisco Identity-Based Networking Services (IBNS) 2.0

Cisco TrustSec


Exam Preparation Tasks

Chapter 26 Network Device Access Control and Infrastructure Security

"Do I Know This Already?" Quiz

Foundation Topics

Access Control Lists (ACLs)

Numbered Standard ACLs

Numbered Extended ACLs

Named ACLs

Port ACLs (PACLs) and VLAN ACLs (VACLs)

PACL, VACL, and RACL Interaction

Terminal Lines and Password Protection

Password Types

Password Encryption

Username and Password Authentication

Configuring Line Local Password Authentication

Verifying Line Local Password Authentication

Configuring Line Local Username and Password Authentication

Verifying Line Local Username and Password Authentication

Privilege Levels and Role-Based Access Control (RBAC)

Verifying Privilege Levels

Controlling Access to vty Lines with ACLs

Verifying Access to vty Lines with ACLs

Controlling Access to vty Lines Using Transport Input

Verifying Access to vty Lines Using Transport Input

Enabling SSH vty Access

Auxiliary Port

EXEC Timeout

Absolute Timeout

Authentication, Authorization, and Accounting (AAA)



Configuring AAA for Network Device Access Control

Verifying AAA Configuration

Zone-Based Firewall (ZBFW)

The Self Zone

The Default Zone

ZBFW Configuration

Verifying ZBFW

Control Plane Policing (CoPP)

Configuring ACLs for CoPP

Configuring Class Maps for CoPP

Configuring the Policy Map for CoPP

Applying the CoPP Policy Map

Verifying the CoPP Policy

Device Hardening

Exam Preparation Tasks


Chapter 27 Virtualization

"Do I Know This Already?" Quiz

Foundation Topics

Server Virtualization

Virtual Machines


Virtual Switching

Network Functions Virtualization

NFV Infrastructure

Virtual Network Functions

Virtualized Infrastructure Manager

Element Managers

Management and Orchestration

Operations Support System (OSS)/Business Support System (BSS)

VNF Performance

Cisco Enterprise Network Functions Virtualization (ENFV)

Exam Preparation Tasks

Chapter 28 Foundational Network Programmability Concepts

"Do I Know This Already?" Quiz

Foundation Topics

Command-Line Interface

Application Programming Interface

Northbound API

Southbound API

Representational State Transfer (REST) APIs

API Tools and Resources

Introduction to Postman

Data Formats (XML and JSON)

Cisco DNA Center APIs

Cisco vManage APIs

Data Models and Supporting Protocols

YANG Data Models

Cisco DevNet







Basic Python Components and Scripts

Exam Preparation Tasks

Chapter 29 Introduction to Automation Tools

"Do I Know This Already?" Quiz

Foundation Topics

Embedded Event Manager

EEM Applets

EEM and Tcl Scripts

EEM Summary

Agent-Based Automation Tools



SaltStack (Agent and Server Mode)

Agentless Automation Tools


Puppet Bolt

SaltStack SSH (Server-Only Mode)

Comparing Tools

Exam Preparation Tasks

Chapter 30 Final Preparation

Getting Ready

Tools for Final Preparation

Pearson Test Prep Practice Test Software and Questions on the Website

Customizing Your Exams

Updating Your Exams

Premium Edition

Chapter-Ending Review Tools

Suggested Plan for Final Review/Study



Appendix A Answers to the "Do I Know This Already?" Questions

Appendix B CCNP Enterprise Core ENCOR 350-401 Official Cert Guide Exam Updates

Online Elements


Appendix C Memory Tables

Appendix D Memory Tables Answer Key

Appendix E Study Planner

9781587145230 TOC 10/24/2019

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