Introduction Cisco’s Generic Routing Encapsulation (GRE) protocol is a tunneling protocol that can encapsulate a variety of network layer protocols between two point-to-point links. GRE can allow you to create an overlay network on top of the existing underlay network… Continue Reading
Introduction IP Access Control lists perform packet filtering to control the movement of packet through a network. In this case, proper rules need to be configured based on established security policies. There are two main types of IP Access Lists… Continue Reading
Introduction Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is easy to learn and has a tiny footprint with lightning fast performance.… Continue Reading
Let’s review a simple IP addressing concept. To conserve IPv4 addresses certain blocks of IPs have been curved out of the IPv4 address ranges for use as private IPs. Public IPs are routeable over the internet while private IPs are… Continue Reading
Let’s look at how to write a simple Python script to calculate the Net-ID given an IP address and a subnet mask. We will work with 10.10.10.65/26. This is the script I will use. Now, let’s go through it step… Continue Reading
Introduction Another way of configuring inter-VLAN routing is through the use of Switch Virtual Interfaces on a multilayer switch whereby we configure virtual interfaces on the switch. However, we will not require a Router to route traffic between multiple vlans.… Continue Reading
Difficulty: Intermediate Hello Everyone, Let’s look at a very simple example below of how we can use Python Programming to log into multiple devices and send configs to them. Preparation. My lab is simulated on GNS3. In my lab, I… Continue Reading
Level: Beginner Hello Everybody, Let’s look at a very simple piece of code. This is a function (divisionfunction(a,b)) that accepts two values from a user, divides the first value by the second value and then prints out the results of… Continue Reading
Hello Everyone, As most of you are aware, mid to late last year, Cisco introduced their new certification tracks. All previous exams for the same were also retired late February 2020. I keep getting may questions particularly by those of… Continue Reading
The Dynamic Host Configuration Protocol (DHCP) is a network protocol that lets network administrators manage and automate the assignment of IP addresses. Without DHCP, the administrator must manually assign and configure IP addresses, preferred DNS servers, and default gateways. As… Continue Reading