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Forwarding per-hop behavior (PHB) for QoS Tutorial
Quality of Service (QoS) is a tool that allows our network to prioritize certain types of traffic. QoS defines the actions that a device can apply to a message between the time it enters the device...
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Key Security Concepts Tutorial
In the digital world, where we use computers and the internet for many things, keeping our information safe is one of the most important tasks. This tutorial will explore some of the popular and...
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Configure SSH for Remote Access on Cisco Router
One of the most popular way to access a Cisco router remotely is using Telnet but it is an unsecured method as the data is sent unencrypted. If a bad person grabs data from a Telnet session, he can see...
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How a router makes a forwarding decision
We all know when a packet reaches a router interface, the router will send the packet to the destination. But how can a router determines which route is the best to use to send the packet? In this...
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What is SDN?
Most traditional devices use a distributed architecture, in which each control plane is resided in a networking device. Each device will make its own decision. Therefore they need to communicate with...
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Voice VLAN Configuration Sim 2
Tasks R1 has been pre-configured with all the necessary commands. All physical cabling is in place and verified. Connectivity to the end devices must be configured. 1. Configure SW-1 switch port E0/1...
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Voice VLAN & LLDP Sim
Tasks All physical cabling is in place and verified. Connectivity for the Switches on ports E0/1, E0/2, and E0/3 must be configured and available for voice and data capabilities. 1. Configure Sw1 and...
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DHCP Snooping Tutorial
DHCP Snooping is a Layer 2 security feature that can be configured on a switch to listen DHCP traffic and block DHCP OFFER and DHCP ACK packets (which can only be sent from a DHCP server) on untrusted...
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Configure DHCP Packet Tracer Lab
In this real world scenario, we will configure R1 as a DHCP server while Client 1 will be DHCP client with the topology shown below: Note: If you are still not sure about DHCP, please read our DHCP...
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Connect Python to GNS3 for Automation in Win10
In this lab we will learn how to program Python (version 3) to telnet to GNS3 router in Windows 10 and do some configuration commands like create an interface on GNS3 router. Our topology is very...
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CCNA Testing Engine
To make your preparation easier, we have designed this online practice exam, which helps you become familiar with the format of the exam. You can practice with multiple-choice questions, drag-and-drop...
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Network Time Protocol (NTP) Tutorial
The Network Time Protocol (NTP) is a crucial service not only for Cisco devices but for most network devices. Any device needs to be accurately synchronized with a reliable time source such as an NTP...
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REST API Tutorial
An API (Application Programming Interface) allows different software applications to communicate with each other. It defines the methods and data formats that applications can use to request and...
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Generative AI vs Predictive AI Tutorial
Artificial intelligence (AI) is full of concepts that seem familiar at first glance, but often reveal much more complexity upon closer examination. One such example is the distinction between...
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Spine-Leaf Architecture Tutorial
Spine-leaf architecture is a modern network topology widely used in data centers and cloud environments. It’s designed to offer improved scalability, high availability, and consistent low-latency...
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