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Cisco IOS Command Line Interface (CLI) Keyboard Shortcuts

Learning to configure your Cisco devices from the Command Line Interface (CLI) is an essential step towards your Cisco networking career. This means that you need to learn how to configure the Cisco IOS operating system which runs on routers, switches and other network devices. Acquiring this hands-on experience with the Cisco IOS CLI will […]

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Filed Under: Cisco General

10 Best Hardware Firewalls for Home and Small Business Networks (2021)

hardware firewalls for home and business

On this website I have written tens of articles about enterprise level firewalls (especially Cisco ASA) but many people are interested to learn about the best hardware firewalls for home or small business networks, so this is what I’ll focus in this article. Firewalls are designed to monitor incoming and outgoing traffic, helping to keep […]

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Filed Under: Network Security, Product Reviews

25 Best Open Source & Free Network Monitoring Tools (Guide)

NMS tools

As network engineers and administrators, we mostly focus on managing and configuring hardware devices such as routers, switches, firewalls, load balancers etc. We rarely deal with software management tools which are equally important in a corporate network. Without knowing the health, performance, availability and quality of your network is like running with closed eyes. Network […]

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Filed Under: Software

12 Best Open Source Firewalls Comparable to Commercial Solutions

top 10 free open source firewall software

Usually, in the world of network security, when we talk about Firewalls we mean the devices that help protect your computer systems and networks from attacks and provide a “wall” in front of servers and IT resources. The above concept of a “Firewall” refers to the classic network hardware firewall such as the Cisco ASA, […]

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Filed Under: Network Security

Comparison and Differences Between MAC vs IP Address

mac vs ip address comparison

Every host or device that is connected to a TCP/IP network must have two addresses in order to send and receive traffic on the network. These are MAC and IP addresses. Knowing the details and functionality of these two address types is essential for anyone working in networking or in I.T in general. In this […]

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Filed Under: General Networking

How to Configure Port Forwarding on Cisco Router (With Examples)

network diagram of cisco router with port nat

Imagine the following situation: You are a network engineer and your boss or a customer wants you to build a cheap and easy solution to host a publicly accessible server (such as Webserver, Email server, VPN server etc) using only a regular Cisco router. In most network designs, you will see that the usual and […]

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Filed Under: Cisco Routers

Comparison of VLAN vs Subnet in TCP/IP Computer Networks

vlan and subnets in networks

A few decades ago, flat networks were the norm. I remember in my very first job as a network engineer, most of our clients’ networks consisted of a single broadcast domain (VLAN) and a huge single flat Layer 3 network (usually in the 10.0.0.0 range). As time passed by and networks started to become bigger […]

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Filed Under: General Networking

Comparison of FTP and HTTP Network Communication Protocols

http vs ftp

FTP and HTTP are two of the oldest network protocols in existence. Although they made their appearance in the nineteen-eighties, they are still among the most popular network protocols used in Information Technology and Internet in general. HTTP is an acronym for Hypertext Transfer Protocol.  FTP is an acronym short for File Transfer Protocol.  Both […]

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Filed Under: General Networking

The Most Important Cisco Show Commands You Must Know (Cheat Sheet)

most useful show commands on cisco devices

If you are a networking professional that is operating and supporting Cisco devices and networks, then learning some important “show commands” is essential. There are a few different categories of commands on Cisco devices. There are commands that configure the device to perform a certain function and also there are commands that extract information from […]

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Filed Under: Cisco Routers, Cisco Switches

Cisco Show IP Route Command (Routing Table)-Example and Explanation

explanation of show ip route on cisco routers

Routing and Switching form the foundation of computer networks and the Internet in general. A network engineer must know routing principles like the back of his/her hand!! In this practical tutorial we will discuss the Cisco “show ip route” command which allows a network engineer to examine the routing table of a router device in […]

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Filed Under: Cisco Routers

Traffic Filtering on Cisco Layer3 Switches using ACL and VACL

layer 3 switch traffic filtering

Cisco devices offer excellent features for traffic filtering. The classic Access Control List (ACL) is the core mechanism on Cisco network devices (routers, switches etc) which is mainly used for traffic filtering. In this article we will examine a different type of ACL, called the Vlan Access Control List (VACL) which works a little different […]

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Filed Under: Cisco Switches

How to Configure Cisco Router-on-a-stick with Switch

configuration example of router on a stick using Cisco router and Layer 2 Switch

In this post I will explain how to provide routing between two VLANs on a simple Layer 2 switch using a Cisco router with just one interface. This is called also Router-on-a-stick. This configuration is usually asked as a question in CCNA exams, so I hope it will be helpful for people preparing for certification. […]

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Filed Under: Cisco Switches

How to Configure OSPF on Cisco Routers (With Example Commands)

Open Shortest Path First (OSPF) is a routing protocol developed by Internet Engineering Task Force (IETF). OSPF is standards-based which means it is available on routers by Cisco as well as other vendors, making it a vendor-neutral routing protocol. This is in contrast to Enhanced Interior Gateway Protocol (EIGRP) that is Cisco proprietary, and hence […]

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Filed Under: Cisco Routers

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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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