Network Fundamentals

I was once involved in a project for a client with quite a large network spanning several locations and cities. The client wanted to know the real state of their network so as to improve the overall performance of the network. Basically, he needed a network audit. The scope of this project …

F5 load balancers are very important devices for distributing and balancing application and network traffic across servers. That is done in order to increase system capacity, with a fast and seamless delivery of packets. We can divide load balancer appliance in general into two main categories. 1 – Transport layer load balancer …

In this article we are going to explain what the ip subnet zero is, but first we need to introduce subnetting. The Subnetting is used to partition a network into sub-networks (also called subnets) that are smaller in terms of addressing space. The first and the last subnets calculated during the …

Classless Inter Domain Routing (CIDR) e Variable Length Subnet Mask (VLSM) were introduced to use the IP addressing space in a more efficient way, but also to improve the scalability for the global routing mechanism. Let’s see how CIDR vs VLSM get to work with IP addresses. The exponential growth of …

Ever wondered how the IP Address Classes are defined and used in the network devices? If so, keep reading! Electronic devices such as computers and routers rely on an internal binary architecture. They use bits that can only have two mathematical values: ‘0’ and ‘1’. The decimal/binary conversion is fundamental …

Do you know all about private IP address? In this article we analyze advantages, disadvantages and how they work in IPv6 networks.

An IP address is a unique identifier for a device connected to a network. It’s a 32 bits number that converted in decimal covers the range 0-4.294.967.296 (i.e. 2 power 32). If the addressing space wasn’t hierarchically organized, it would be possible to connect around 4.3 billions network devices. To simplify the use …

Defining an access control list may seem a challenging and complex task, especially to those that have just delved into the world of computer networking and network security. The aim of this article is to explain the role of access control lists and basic concepts used to understand them. The …

Cisco CCNA Training:  IP Addressing Part 1 Here’s a great video to help you get a better understanding of ip addressing.

In my previous post, I explained what is Software Defined Networking (SDN). As I wanted to keep the introduction simple, I avoided discussing SDN internals in that post. Now that you understand what SDN is, let us get into other details.   SDN Internals In SDN, sequence of packets exchanged between …