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Cisco Networking Tutorials for Beginners and Experts

My name is Harris Andrea and I would like to extend a warm welcome to you.

About me in a few words.

Let me tell you a story. When I was in my last year in University (in the late 90’s) I had to take some courses around TCP/IP and computer networking.

That was the time that something clicked in my mind. I don’t know if it was my professor’s teaching skills and enthusiasm about the subject, but after finishing those courses I knew that IP networking was the field I wanted to explore more in my professional career.

After graduating, I started working in a relatively small but high-caliber technology company that was a Cisco Gold Partner.

I was absorbing experience and information like a sponge. I got involved in all sorts of projects in designing and implementing networks based mainly on Cisco products and other high-profile vendors. That job was like a second University degree for me but in a more practical way.

After working there for almost 5 years, I moved on and got a new job in a big Internet Service Provider (ISP) where I’m still working until today.

During all these years in my new job I have been responsible for operating, supporting and designing huge networks that contain carrier-grade routers and switches, firewalls, intrusion prevention systems, management and monitoring systems, security infrastructure devices and anything that can be found in an ISP environment.

About this Website

About 15 years ago, I decided to create a blog to share my experience in the form of Cisco networking tutorials, configuration examples, guides, tips, industry news etc for both beginners and experts. This is how this blog was born.

If you want to receive Cisco tutorials, configuration guides and other networking and security related topics from me, subscribe below to join over 18,000 other professionals that receive my emails.

If you want to explore my blog, scroll until the end of this post to see my latest articles or click on a category to the right for all the topics I have written related to Cisco technologies, network and information security, general networking etc.

By subscribing below I will send you also three Cisco cheat sheet PDF files about the following:

• Cisco Routers Commands Cheat Sheet.
• Cisco Switches Commands Cheat Sheet.
• Cisco ASA Firewall Commands Cheat Sheet.

Download Free Cisco Commands Cheat Sheets

Enter your Email below to Download our Free Cisco Commands Cheat Sheets for Routers, Switches and ASA Firewalls.

We use Elastic Email as our marketing automation service. By submitting this form, you agree that the information you provide will be transferred to Elastic Email for processing in accordance with their Terms of Use and Privacy Policy. Also, you allow me to send you informational and marketing emails from time-to-time.

My Books

This blog has also been the home of my three books which have been embraced by thousands of professionals. They are available in both digital format (PDF) from this website and also as hard-copy books from Amazon so check them out below:

My Books in Digital Format:

ccna lab bookCCNA 200-301 Labs and Guide Book
DOWNLOAD LABS HERE

 

cisco asa firewall fundamentals ebookConfiguration Tutorial For
Cisco ASA 5500 and 5500-X Firewalls

(Covers Newest v9.x)
DOWNLOAD EBOOK HERE

 

cisco vpn configuration guide

VPN Configuration Guide For
Cisco Routers and ASA Firewalls

With FREE ASA 5505 Configuration Tutorial Bonus

DOWNLOAD EBOOK HERE

 

My Books in hard-copy format from Amazon

Cisco ASA Firewall Fundamentals – 3rd Edition

Cisco VPN Configuration Guide

CCNA 200-301 Lab Guide Book with Packet Tracer

Closing Remarks

I’m here to help you as much as possible, that’s why I always try to answer every comment and email that I receive. Don’t hesitate to contact me or leave a comment under my posts on this website and I’ll try to address and answer your questions if I can.

ccna certification ccnp certification ccsp certification

Filed Under: General Networking

How to Find IP Address From MAC Address on Cisco Devices

ip from mac address

Troubleshooting a network requires many different investigative skills, tools, and methodologies.  One procedure that is particularly useful when investigating various network problems is being able to determine the IP address of a host on the network when given only its MAC address.  In this article we’ll take a look at how to find an IP […]

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Filed Under: Cisco General

What is Cisco IOS – Overview and Description of Cisco’s Operating System

cisco ios

Cisco’s Internetworking Operating System, or IOS, is a family of network operating systems that is used on several models of the company’s routers and switches.  IOS enables routing, switching, internetworking, and a variety of telecommunications functions on a whole series of Cisco network device platforms. IOS has gone through several phases of evolution, and any […]

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Filed Under: Cisco IOS

What is OSPF NSSA (Not So Stubby Area) and How is it Configured?

nssa areas

In this article we will explain and discuss OSPF Not So Stubby Area (NSSA) and also how to configure this Area type on Cisco routers. OSPF is a link state dynamic routing protocol that is used by routers to share routing information.  This allows routers to inform each other of the paths that should be […]

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Filed Under: General Networking

NetworkLessons Review – Is it the Right Training for CCNA-CCNP-CCIE?

network lessons rene molenaar

What if I told you that there are over 700 practical Cisco networking tutorials waiting for you on a single website that can help you learn hundreds of different Cisco networking topics? The resource I’m talking about above is NetworkLessons.com and is probably one of the few online education portals with so many practical lessons on Cisco […]

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Filed Under: Cisco Certifications

How to Configure a Loopback Interface on Cisco Router & Switch

network equipment

A loopback interface is a virtual interface that can be created within a network device and behaves much the same as a physical interface.  Loopback interfaces can be configured on a Cisco router or a switch and have many uses.  In this article, we’ll examine what they are, how they can be configured, and how […]

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Filed Under: Cisco Routers, Cisco Switches

Top 10 PRTG Alternatives for Monitoring Networks and IT Infrastructure

tools similar to prtg

The Paessler PRTG network monitoring solution is well known to network engineers and administrators. It conveniently monitors network activity including bandwidth usage, IP allocation, device status, network health, and even CPU utilization on networked devices (plus much more). Paessler requires users to use a PRTG core server system running on Windows server OS (or two […]

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Filed Under: Software

Comparison of BOOTP vs DHCP Protocols in Computer Networks

sample network

Layer 3 addressing can become difficult to manage in a network especially if you have an extensively large number of host devices.  With tens, hundreds, or even thousands of hosts in many enterprise networks, the need for an automated mechanism for assigning IP addresses and other network parameters was realized very early on. In this […]

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Filed Under: General Networking

Pros and Cons of SD-WAN in Networks – Description and Discussion

pros and cons of sd wan

A Software Defined Wide Area Network (SD-WAN) is a concept that has been around for over a decade.  SD-WAN is a WAN architecture that uses software-defined network technology to deliver a high availability, low cost, and highly flexible WAN connections over the Internet and other public networks. In this article, we will attempt to shed […]

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Filed Under: General Networking

How to Configure SNMP on Cisco Devices (Routers, Switches)

snmp

Simple Network Management Protocol (SNMP), so “simple” yet so powerful.  SNMP delivers a standardized framework that can be used for the monitoring and management of network devices. SNMP is one of the most powerful tools that can be used by today’s network administrators and engineers.  SNMP allows admins to poll for data such as CPU […]

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Filed Under: Cisco IOS

Comparison of GNS3 vs EVE-NG vs Packet Tracer for Networks Simulation

comparison of gns3, eve-ng,packet tracer

I have had many years of experience training students and professionals in networks and telecommunications. In those years, I have found time after time that the single most important activity a trainee can do to learn networking concepts is to spend time in the lab. Creating network topologies and applying the theory learned in the […]

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Filed Under: General Networking, Software

Subnetting vs Supernetting – What’s the Difference? (Explanation Guide)

subnet vs supernet

Subnetting and supernetting are two processes that are applied to IPv4 address spaces.  Each one serves a different purpose and can be used in various applications.  In this article, we’ll examine and compare Subnetting vs Supernetting in IP networks and see how they are applied to various aspects of network design and configuration. Structure of […]

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Filed Under: General Networking

Cisco Command to Test a Copper UTP Ethernet Cable on a Switch

holding utp cable

Troubleshooting physical layer problems on UTP Ethernet cabling can sometimes be a nightmare.  Dealing with patch cables is a snap, but what happens if your structured cabling has a fault, or if a newly created UTP cable results in intermittent connectivity?  Further still, what if you don’t have direct access to the faulty cabling because […]

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Filed Under: Cisco General

Comparison of TCP/IP vs OSI Models in Networking

osi vs tcp ip

Communication is key in modern life. Emails, phone calls, video calls are obvious examples. But, video streaming, ecommerce, eLearning, gaming etc are also a kind of communication. We are performing some type of communication in most of our life aspects. Successful communication requires that all participating parties know how to “talk” to each other and, […]

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Filed Under: General Networking

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About Networks Training

We Provide Technical Tutorials and Configuration Examples about TCP/IP Networks with focus on Cisco Products and Technologies. This blog entails my own thoughts and ideas, which may not represent the thoughts of Cisco Systems Inc. This blog is NOT affiliated or endorsed by Cisco Systems Inc. All product names, logos and artwork are copyrights/trademarks of their respective owners.

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