Learning Spanning Tree Protocol (STP) I found how important this concept is for layer 2 switching of the redundancy concept. Beginning network engineers should not overlook or misunderstand this fundamental topic, even though PVST+, RPVST+, or MSTP protocols are the only ones found on Cisco modern switches.

The OSI (Open Systems Interconnection) model is a conceptual framework used to understand how different networking technologies interact and communicate with each other. It divides the networking process into seven distinct layers, each with specific functions and responsibilities.

A couple of articles about networking wiring. I will attempt to describe the fundamental cable technology. 

It may be difficult for someone who is new to networking to understand the differences between routers and switches. For more advanced users, it is natural and fundamental, but for beginners, it is not as simple.

Troubleshooting in networking refers to the process of identifying and resolving problems or issues that occur in a network. This involves identifying the root cause of the problem, isolating the affected area, and taking corrective action to restore normal network functionality.

Dynamic Host Configuration Protocol (DHCP) is a network management protocol used on Cisco routers to automatically assign IP addresses and other network configuration information to devices (clients) on a network

DHCP snooping protection is the security feature that protects DHCP service from fraud in the network. Its purpose is to prevent malicious or unauthorised DHCP service, providing false IP addresses to network clients.

Dynamic ARP Inspection (DAI) is a security feature on switches designed to prevent ARP spoofing or poisoning attacks.

Implementing DAI enhances network security by ensuring devices communicate with trusted peers, effectively mitigating ARP-based attacks.

Syslog enables switches and routers to have a log system to monitor, debug, and troubleshoot a network. This helps to detect any problem and prevent or correct any issues.

NTP is a critical protocol for maintaining time synchronization across network devices. Without it, troubleshooting, security, and network automation can become unreliable. Every well-configured network should have a robust NTP setup to ensure accurate and secure timekeeping.

Using the Routing Information Protocol (RIP) in a lab environment can be beneficial for several reasons, especially for those learning about networking and routing.

I present how to use RIP protocol in the lab to simplify routing and easy configuration.

To configure the console port on a Cisco switch, you typically set parameters that control how users connect to the device via the console cable. Here's a basic guide to help you set up console access.

Telnet configuration of a Cisco switch or router involves enabling and configuring the device to allow remote management over the network using the Telnet protocol. Telnet is an older protocol that provides a command-line interface for managing network devices. However, it transmits data (including passwords) in plaintext, making it less secure than SSH.

In this lab we set up Telnet protocol on Cisco switch.

Dynamic Host Configuration Protocol (DHCP) is a network management protocol used to automatically assign IP addresses and other network configuration parameters to devices (clients) on a network. It eliminates the need for manual configuration, making network management simpler and more efficient.

In this lab I go through DHCP settings on Cisco routers.