Category: Cisco Certification and Exams

The Cisco NX-OS software has two types of configuration files: running configuration and startup configuration. The device uses the startup configuration (startup-config) during device startup to configure the software features. The running configuration (running-config) contains the current changes that you make to the startup configuration file. The two configuration files can be different. You might…

Read More “NX-OS Configuration Save and Backup – Cisco CCNP and CCIE” »

The Cisco NX-OS in-service software upgrade (ISSU) service allows you to upgrade Cisco Nexus device software while the switch continues to operate and forward traffic. The ISSU reduces or eliminates the downtime typically caused by software upgrades. The default upgrade process is disruptive, so the ISSU needs to be enabled using the CLI. Use of…

Read More “Nexus Nondisruptive In-Service Software Upgrade – Cisco CCNP and CCIE” »

PowerOn Auto Provisioning (POAP) automates the process of upgrading software images and installing configuration files on Cisco Nexus switches that are being deployed in the network for the first time. When a Cisco Nexus Series switch with the POAP feature boots and does not find the startup configuration, the switch enters POAP mode, locates a…

Read More “PowerOn Auto Provisioning (POAP) – Cisco CCNP and CCIE” »

A hybrid cloud is composed of two or more clouds (private, community, or public) that remain unique entities but are bound together, offering the benefits of multiple deployment models. A hybrid cloud can also consist of multiple cloud systems that are connected in a way that allows programs and data to be moved easily from…

Read More “Hybrid Cloud – Cisco CCNP and CCIE” »

Amazon is arguably the first major proponent of Infrastructure as a Service (IaaS) through its Elastic Computing Cloud (EC2) service. An IaaS provider offers “raw” computing, storage, and network infrastructure so that you can load your own software, including operating systems and applications, on to this infrastructure. This scenario is equivalent to a hosting provider…

Read More “Infrastructure as a Service – Cisco CCNP and CCIE” »

Unlike the fixed functions offered by SaaS, Platform as a Service (PaaS) provides a software platform on which users can build their own applications and host them on the PaaS provider’s infrastructure. The software platform is used as a development framework to build, debug, and deploy applications. It often provides middleware-style services such as database…

Read More “Platform as a Service – Cisco CCNP and CCIE” »

Consider the case of an enterprise with its set of software licenses for the various applications it uses. These applications could be in human resources, finance, or customer relationship management, to name a few. Instead of obtaining desktop and server licenses for software products it uses, an enterprise can obtain the same functions through a…

Read More “Software as a Service – Cisco CCNP and CCIE” »

For a long time, data centers have faced a critical challenge: the number of applications and amount of data in the data center continue their rapid growth, while IT struggles to provide the resources necessary to make services available to users and meet today’s demands using existing infrastructure and organizational silos. For too long, this…

Read More “What Is Cloud Computing? – Cisco CCNP and CCIE” »

In today’s world, cloud seems to be the answer to every question, from storing photographs to renting computing capability. But cloud computing history goes back to the 1950s when mainframes and time sharing were born. In this era, massive computers performed centralized computational operations, and an elite group of companies shared the computational power of…

Read More “Cisco Cloud Services and Deployment Models” »

ACI Fabric Traffic Storm Control A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. You can use traffic storm control policies to prevent disruptions on Layer 2 ports by broadcast, unknown multicast, or unknown unicast traffic storms on physical interfaces. By default, storm control is not enabled in…

Read More “ACI Fabric Traffic Storm Control – Cisco CCNP and CCIE” »