Chapters & Articles

First Hop Redundancy Protocols (FHRPs) add the function of redundancy and load sharing for the default router function in any subnet. In this sample chapter you will learn the purpose, functions, and concepts of FHRPs. This chapter covers the following exam objectives from the CCNA 200-301 v1.1 exam: 3.0 IP Connectivity and 3.5 FHRPs.

Configuring OSPF, using mostly default settings for all the optional features, requires only a few commands. Here you will learn how to implement OSPFv2 using network Commands and Interface Subcommands. This sample chapter from CCNA 200-301 Official Cert Guide covers the following CCNA 200-301 v1.1 exam objectives: 3.0 IP Connectivity to 3.4.d Router ID.

The pyATS library (Genie) provides the Genie Harness to execute network tests with dynamic and robust capabilities. The Genie Harness can be daunting for new users of the pyATS library (Genie), as there are many configuration options and parameters. By the end of the chapter, you'll understand the powerful capabilities of Genie Harness and how to write and execute triggers and verifications.

Learn common design strategies in SD-WAN and DMVPN deployments, and how to design and deploy these two technologies to integrate with other IBN domains, in this sample chapter from Designing Real-World Multi-domain Networks.

The Cisco Meraki platform can now be used to manage all digital cloud operations in one single integration. In this sample chapter from Cisco Meraki Fundamentals: Cloud-Managed Operations, you will learn how the Dashboard can help administrators monitor and proactively address potential issues in their day-to-day workflow.

This sample chapter from In Zero Trust We Trust focuses on helping you craft standard metrics based on key constructs, such as risk and performance, so that you can showcase the value that Zero Trust brings to the enterprise infrastructure, processes, and people.

In this sample chapter from CCNP Enterprise Advanced Routing ENARSI 300-410 Official Cert Guide, 2nd Edition, you will learn the underlying mechanics of the EIGRP routing protocol and the path metric calculations, and how to configure EIGRP on a router for IPv4 and IPv6. This book covers topics from the Cisco Enterprise Advanced Routing v1.1 (ENARSI 300-410) exam.

In this sample chapter from CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guide, 2nd Edition, you will learn OSPFv3 routing protocol, configuration, and IPv4 support. OSPF Version 3 (OSPFv3), which is the latest version of the OSPF protocol, includes support for both the IPv4 and IPv6 address families. This book covers topics from the Cisco Enterprise Core v1.1 (ENCOR 350-401) exam.

In this sample chapter from CCNP and CCIE Collaboration Core CLCOR 350-801 Official Cert Guide, 2nd Edition, you will learn PSTN options for Webex Calling, routers supporting local gateway, and deployment scenarios for the local gateway. This chapter covers the following objective from the Cisco Collaboration Core Technologies v1.1 (CLCOR 350-801) exam: 3.4 Describe cloud calling hybrid local gateway.

With more people accessing your business through a digital experience, application performance is more critical than ever, and managing resources across your complex IT environment has big implications on user experience and costs. In this sample chapter from Cisco Cloud Infrastructure, you will learn about workload management solutions including Intersight Workload Optimization Manager (IWO) and Cisco Intersight Kubernetes Service.

As a network designer, understanding the purpose and goal of the network is critical to properly designing it. This sample chapter from Cisco Certified Design Expert (CCDE 400-007) Official Cert Guide maps to the CCDE v3.0 Unified Exam Topics Section 4.0, "Service Design," and covers the service design topics—from business applications and service models, to the cloud and data management—you need to meet business objectives.

Jenkins is an open-source tool used for Continuous Integration and Continuous Delivery (CI/CD). In this excerpt from Automating and Orchestrating Networks with NetDevOps, you will learn how a NetDevOps engineer implements automated CI/CD pipelines with Jenkins.

ACI is designed to allow small and large enterprises and service providers to build massively scalable data centers using a relatively small number of very flexible topologies. In this sample chapter from CCNP Data Center Application Centric Infrastructure 300-620 DCACI Official Cert Guide, the author team details the topologies with which an ACI fabric can be built or extended.

Workload Optimizer is an analytical decision engine that generates actions that drive the IT environment toward a desired state where workload performance is assured and cost is minimized. In this sample chapter from Cisco Intersight: A Handbook for Intelligent Cloud Operations, you will explore how Workload Optimizer helps applications perform well while simultaneously minimizing cost (in a public cloud) and optimizing resource utilization (on premises) while also complying with workload policies.

Port Channel technology allows multiple links between two participating devices to be used to forward traffic by using a load-balancing algorithm. vPC (virtual port channel) technology allows multiple devices to form a port channel. In this sample chapter from Cisco Data Center Fundamentals, the authors discuss Ethernet port channels, including port channel modes, port channel compatibility requirements, and port channel load balancing.

Building Python functions allows for the creation of reusable code and is the first step toward writing object-oriented code. In this sample chapter from Cisco Certified DevNet Associate DEVASC 200-901 Official Cert Guide, you will review working with and building Python functions. It also introduces how Python modules can extend the capabilities of Python and make your job of coding much easier.