Cisco Certified DevNet Professional DEVCOR 350-901 Official Cert Guide

Cover
Title Page
Copyright Page
About the Authors
Dedications
Acknowledgments
Contents
Introduction
Part I: Software Development and Design
	Chapter 1 Software Development Essentials
		“Do I Know This Already?” Quiz
		Foundation Topics
		A Brief History of the Future
			The Evolution
			Automation, Orchestration, and DevOps
		Software Architecture and Design
		Architecture Requirements
			Functional Requirements
			Nonfunctional Requirements
		Architectural Patterns
		Software Development Lifecycle (SDLC) Approach
		Software Development Models
			Waterfall
			Agile Software Development
			Scrum
			Extreme Programming
			Kanban
			Lean
			Which Model?
		Architecture and Code Reviews
		Software Testing
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 2 Software Quality Attributes
		“Do I Know This Already?” Quiz
		Foundation Topics
		Quality Attributes and Nonfunctional Requirements
			Brief Overview of the Most Common Quality Attributes
			Measuring Quality Attributes
		Modularity in Application Design
			Benefits of Modularity
			Modularity Coding Best Practices
			Microservices and Modular Design
		Scalability in Application Design
			Horizontal Scalability
			Vertical Scalability
		Practical Scalability in Application Design
		High Availability and Resiliency in Application Design
			Failure or Fault Detection
			Recovery: High Availability in Practice
			Prevention
			High Availability Planning and the Responsibilities of the Developer
			High Availability Deployment Models
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 3 Architectural Considerations and Performance Management
		“Do I Know This Already?” Quiz
		Foundation Topics
		Maintainable Design and Implementation
			Maintaining a SOLID Design
			Single Responsibility Principle (SRP)
			Open-Closed Principle (OCP)
			Liskov’s Substitution Principle (LSP)
			Interface Segregation Principle (ISP)
			Dependency Inversion Principle (DIP)
		Latency and Rate Limiting in Application Design and Performance
			Designing for Application Low Latency and High Performance
			Architecture Trade-offs
			Improving Performance
		Design and Implementation for Observability
			Logging
			Metrics
			Tracing
			Good Documentation Practices: An Observability Reminder
		Database Selection Criteria
			Database Requirements Gathering
			Data Volume
			Data Velocity
			Data Variety
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 4 Version Control and Release Management with Git
		“Do I Know This Already?” Quiz
		Foundation Topics
		Version Control and Git
		Git Workflow
			Branch and Pull Workflow
			Pros
			Cons
			Sample Setup
			Sample Branch and Pull Workflow
			Fork and Pull Workflow
			Pros
			Cons
			Sample Setup
			Sample Fork and Pull Workflow
		Git Branching Strategy
			What Is a Branching Strategy?
			The Most Important Factor When Selecting a Git Branching Strategy
			Popular Git Branching Strategies
			When to Use GitHub Flow
			When to Use Git Flow
			When to Use GitLab Flow
			Recommended GitHub Settings
			Configuring the PR Merge Button
			Configuring a Branch Protection Rule to Require Code Reviews
			Exam Preparation Tasks
			Review All Key Topics
			Complete Tables and Lists from Memory
			Define Key Terms
			References
Part II: APIs
	Chapter 5 Network APIs
		“Do I Know This Already?” Quiz
		Foundation Topics
		What Are APIs?
			Methods
			Objects
			Formats
			APIs vs. No API
			Web Scraping
			Jeff Bezos’s API Mandate: How the AWS API-Driven Cloud Was Born
		Calling an API
			What Is API Development?
			API Architectural Styles
		Selecting an API Style
			HTTP/JSON
			REST/JSON
			Cache-Control
			REST vs. RPC
			gRPC
			OpenAPI/Swagger
		Network API Styles
			NETCONF APIs
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 6 API Development
		“Do I Know This Already?” Quiz
		Foundation Topics
		Creating API Clients
			Code Generation Client API Libraries for IMDb
			Adding CLI Wrapper Code
			Making Calls to IMDb Using a CLI Program
		API Design Considerations
			API Authentication Models
			Flow Control (Pagination vs. Streaming)
			Error Handling, Timeouts, and Rate Limiting
			Caching
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
Part III: Application Development, Deployment, and Security
	Chapter 7 Application Deployment
		“Do I Know This Already?” Quiz
		Foundation Topics
		The Evolution of Application Responsibilities
			The Hybridization of Development and Operations
			The Journey to DevOps
			A Cultural Shift
			The Emergence of the Site Reliability Engineer(ing)
			SRE Responsibilities and Tenets
			SRE vs. DevOps
			Continuous Integration/Continuous Delivery (Deployment)
			Continuous Integration (CI)
			Continuous Delivery: One of the CDs
			Continuous Deployment: The Other CD
		CI/CD Pipeline Implementation
			Pipeline Components
			Build
			Test
			Release/Deliver
			Deploy
			Adding Deployment to Integration
			Deploying to Infrastructure (Terraform + Atlantis)
			Deploying Applications (Flux + Kubernetes)
		Application Deployment Methods over Time
			The 2000s: Sysadmins, Terminals, and SSH
			The 2010s: Automated Configuration Management
			The 2020s: The Clouds Never Looked So Bright
			Managed Kubernetes (e.g., GKE)
			Containers on Serverless Clouds (e.g., AWS ECS on Fargate)
			Serverless Functions (e.g., AWS Lambda)
		Software Practices for Operability: The 12-Factor App
			Factor 1: Codebase
			Factor 2: Dependencies
			Factor 3: Config
			Factor 4: Backing Services
			Factor 5: Build, Release, Run
			Factor 6: Processes
			Factor 7: Port Binding
			Factor 8: Concurrency
			Factor 9: Disposability
			Factor 10: Dev/Prod Parity
			Factor 11: Logs
			Factor 12: Admin Processes
		Summary
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 8 Security in Application Design
		“Do I Know This Already?” Quiz
		Foundation Topics
		Protecting Privacy
			Personally Identifiable Information
			Data States
			Laws, Regulations, and Standards for Protecting Privacy
		Storing IT Secrets
		Public Key Infrastructure (PKI)
			Certificate Revocation
			Hierarchical Multiple CA Infrastructure
			TLS, PKI, and Web Applications Security
			Browser Security Issues
		Securing Web and Mobile Applications
			Injection Attacks
			Cross-Site Scripting
		OAuth Authorization Framework
			How Does OAuth Work?
			OAuth 2.0 Two-Legged Authorization
			OAuth 2.0 Three-Legged Authorization
			Additional OAuth Authorization Code Grant Types
			OAuth 2.0 Client Credentials
			Resource Owner Password Credential Flow
			OAuth 2.0 Implicit Flow
			OAuth 2.0 Authorization Code Flow
			OAuth 2.0 PKCE Flow
			Refresh Token Flow
			OAuth 2.0 Device Code Flow
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
Part IV: Infrastructure and Automation
	Chapter 9 Infrastructure
		“Do I Know This Already?” Quiz
		Foundation Topics
		Network Management
		Methods of Network Provisioning
			CLI/Console
			SNMP
			File Transfer Methods
		Element Management Systems
			Embedded Management
			Zero-Touch Provisioning (ZTP)
			Atomic or SDN-Like/Controller-Based Networking
			Advanced Concepts—Intent-Based Networking
			Summary
			Exam Preparation Tasks
			Review All Key Topics
			Complete Tables and Lists from Memory
			Define Key Terms
			References
	Chapter 10 Automation
		“Do I Know This Already?” Quiz
		Foundation Topics
		Challenges Being Addressed
			Differences of Equipment and Functionality
			Proximity of Management Tools and Support Staff
			Speed of Service Provisioning
			Accuracy of Service Provisioning
			Scale
			Doing More with Less
		Software-Defined Networking (SDN)
			What Is SDN and Network Programmability?
			Approach
			Nontraditional Entities
			Industry Impact
			New Methods
			Normalization
			Enabling Operations
			Enabling Career Options
			Use Cases and Problems Solved with SDN
			Overview of Network Controllers
			The Cisco Solutions
		Application Programming Interfaces (APIs)
		REST APIs
			API Methods
			API Authentication
			API Pagination
			Payload Data Formats JSON XML
			XML
			JSON
		Cross-Domain, Technology-Agnostic Orchestration (CDTAO)
		Impact to IT Service Management and Security
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 11 NETCONF and RESTCONF
		“Do I Know This Already?” Quiz
		Foundation Topics
		Catalyst for NETCONF
			Content
			Operations
			Messages
			Transport
		Atomic and Model-Driven Configuration Management
		How to Implement NETCONF
			Enabling NETCONF on IOS XE
			Enabling NETCONF on IOS XR
			Enabling NETCONF on NX-OS
			Basic Manual Use of NETCONF
		YANG Models
		The Evolution with RESTCONF
			The RESTCONF Protocol Stack
			RESTCONF Operations
			RESTCONF and Authentication
			RESTCONF URIs
			Performing a RESTCONF GET Operation with cURL
			Performing RESTCONF GET Operations with the Postman Utility
		Management Solutions Using NETCONF and RESTCONF
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 12 Model-Driven Telemetry
		“Do I Know This Already?” Quiz
		Foundation Topics
		Transformation of Inventory, Status, Performance, and Fault Monitoring
		Scaling with the Push Model
		How to Implement Model-Driven Telemetry
			Dial-In and Dial-Out Mode
			Encoding (Serialization)
			Protocols
			Configuring MDT in IOS-XR
			Configuring Dial-Out Mode
			Step 1: Create a Destination Group
			Step 2: Create a Sensor Group
			Step 3: Create a Subscription
			Step 4: Verify the Dial-Out Configuration
			Configuring Dial-In Mode
			Step 1: Enable gRPC
			Step 2: Create a Sensor Group
			Step 3: Create a Subscription
			Step 4: Validate the Configuration
		Picking Sensor Paths and Metrics
			Researching Public Documentation
			Extracting Model Support from the Device—NETCONF Manually
			Extracting Model Support from the Device—Python and NETCONF
			Digging into the YANG Models
			Installing Docker to the Linux VM
			Installing the YANG Suite Docker Image to the Linux VM
		Practical Application of Streaming Telemetry
			Using Telegraph, InfluxDB, and Grafana
			Installing InfluxDB
			Installing Telegraf
		Beyond MDT—Event-Driven Telemetry
			Other Considerations—Disk Usage
			Frequency of Telemetry Push
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 13 Open-Source Solutions
		“Do I Know This Already?” Quiz
		Foundation Topics
		Infrastructure-as-Code (IaC) Concepts
			Imperative and Declarative Models
		Provisioning or Configuration Management
		Differences Between Agent and Agentless Solutions
		Agent-Based Solutions—Puppet and Chef
		Agentless Solutions—Ansible and Terraform
			Installing Ansible from the Package Manager
			Installing the Latest Ansible from a Virtual Python Environment with pip
			Configuring Ansible Inventory
			Creating a Project-Level Inventory File
			Creating an Ansible Playbook to Obtain show Command Results
			Filtering, Templating, and Jinja2
			Using Ansible to Modify Device Configurations
			Terraform Overview
			Installing Terraform
			Using Terraform
		Cisco Solutions Enabled for IaC
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 14 Software Configuration Management
		“Do I Know This Already?” Quiz
		Foundation Topics
		Software Configuration Management (SCM)
			SCM Definitions and Standards
			Why Do You Need SCM?
			Which SCM Process Is Best for You?
			Ansible
			Terraform
			Terraform or Ansible: A High-Level Comparison
		Business and Technical Requirements
			Architectural Decisions
			Technical Debt
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
	Chapter 15 Hosting an Application on a Network Device
		“Do I Know This Already?” Quiz
		Foundation Topics
		Benefits of Edge Computing
			Virtualization Technologies
			Type-1 Hypervisors
			Type-2 Hypervisors
			Linux Containers (LXC)
			Docker Containers
		Application Container Ideas
		Platforms Supporting Application Containers
		How to Implement Application Containers
			Validating Prerequisites
			Enabling Application Hosting Framework
			Using Cisco DNA Center for App Hosting
			Using Cisco IOx Local Manager for App Hosting
			Using the Command-Line Interface for App Hosting
			Interacting with App Hosted iPerf3
		Best Practices for Managing Application Containers
		Exam Preparation Tasks
		Review All Key Topics
		Complete Tables and Lists from Memory
		Define Key Terms
		References
Part V: Platforms
	Chapter 16 Cisco Platforms
		“Do I Know This Already?” Quiz
		Foundation Topics
		Webex
			Enabling the Webex REST API/SDK Access
			Webex API Documentation
			API Examples
			SDK Examples
		Firepower
			Enabling API/SDK Access to Firepower
			Firepower API Documentation
		Meraki
			Enabling API/SDK Access to Meraki
			Meraki API Documentation
			Meraki SDK Documentation
			Meraki Authorization
		Intersight
			Enabling API Access to Intersight
			Intersight API Documentation
			Intersight SDK Documentation
			Intersight Authorization
		UCS Manager
			Enabling API Access to UCS Manager
			UCS Manager API Documentation
			Python SDK Documentation
			PowerShell SDK Documentation
			Additional UCS Manager Programmability Resources
		DNA Center
			Enabling API/SDK Access to DNA Center
			DNA Center API Documentation
			DNA Center SDK Documentation
			SDK Authorization
		AppDynamics
		Exam Preparation Tasks
		References
	Chapter 17 Final Preparation
		Getting Ready
		Tools for Final Preparation
			Pearson Cert Practice Test Engine and Questions on the Website
			Accessing the Pearson Test Prep Software Online
			Accessing the Pearson Test Prep Software Offline
			Customizing Your Exams
			Updating Your Exams
			Premium Edition
			Chapter-Ending Review Tools
		Suggested Plan for Final Review/Study
		Summary
Appendix A: Answers to the “Do I Know This Already?” Questions
Appendix B: Cisco DevNet Professional DEVCOR 350-901 Exam Updates
Glossary
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Index
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Online Elements
	Appendix C: Memory Tables
	Appendix D: Memory Tables Answer Key
	Appendix E: Dashboard Basics
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