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Welcome to my blog, where you’ll find my thoughts on topics from networking & security design to career advice. Enjoy your visit!
Our Latest Blog Articles
Interview Tips
Routing and Switching
Data Center
Mission Security
Interview Tips
Routing and Switching
Data Center
Mission Security
IKEv1 vs IKEv2 – What is the Difference?
Showdown: IKEv1 vs IKEv2 Internet Key Exchange (IKE) is a protocol used to set up a secured communication channel between two networks. To establish a secured channel, the two communicating parties need to create a Security Association (SA) between each other through the use of Internet Protocol Security (IPsec). This blog post will compare head to head between IKEv1 vs IKEv2 and provide some key insights. IKEv1 was one of the first standards for internet key exchange, a standard that had remained mostly unchanged for almost 12 years, the year 1995 when IETF first introduced IKE or IKEv1 through RFC…
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150+ Interview Questions of Network Engineer with Answers(Free PDF)
Important Tips and Interview Questions of Network Engineer with Answers Network engineers are the unsung heroes of the tech industry with an excellent take-home salaries. They are the ones who keep everything humming along by designing, installing, and maintaining the complex networks that keep us connected. While this makes you feel like an important person, however becoming a network engineer is not easy. You have to go through many rounds of interviews. You also have to be well prepared and know all the basic and advanced level interview questions of network engineer. It is a tedious process, especially when you don’t…
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What is Cisco vPC: Benefits, Components, Config & Best Practices
What is Cisco vPC and its brief History What is Cisco vPC (virtual Port Channel), and how has normal port-channel evolved to this point? Let us understand port-channel first; it is the simplest and oldest technology that combines two or more interfaces. In return, it gives the benefits like load balancing across links, redundancy in case any link goes down, increased bandwidth since you combined two or more links, and a single spanning-tree view of the links. However, these benefits come at the cost of connecting all the links within a bundle to a single device. And if that single device…
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Practical Tips for Video Interview: A step by step Guide
Practicle Tips for Video Interview 2021- before, during, and After the interview:- If you are looking for Tips for Video Interview, then you came to the right place. Now, allow us to begin; most people who want a job undergo a rigorous interview process. But what if you could skip all that and get an instant decision? That’s what many employers now do, especially after the inception of the coronavirus. Working from home became a new normal for everyone throughout the world. Recruiters post jobs on sites like “Indeed,” Linkedin, etc., and immediately start taking the digital interview and streaming…
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HSRP vs VRRP vs GLBP – A Quick Guide
Which one to use while deciding between HSRP vs VRRP vs GLBP? This is really a matter of the type of equipment at your disposal, network design complexity, or sometimes personal preference. I already wrote articles explaining HSRP, VRRP, and GLBP separately. All three are First Hop Redundancy Protocols and network layer protocols and are used to provide redundancy in the network. The main difference is that VRRP is industry-standard while HSRP and GLBP are Cisco-proprietary protocols. VRRP and HSRP target a single router to be the active one in a group, whereas GLBP can distribute the responsibility among up…
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How to configure VRRP on Cisco Devices – With Video and Quiz
What is VRRP, Why we use it, and How to configure it on Cisco devices? Virtual Router Redundancy Protocol (VRRP) is an open standard FHRP (First Hop Redundancy Protocol) defined in RFC-5798. VRRP on Cisco devices can be configured to provide fault tolerance and redundancy at the network layer by quickly detecting and responding to router failures. It is designed to create redundancy in the network, especially when a router/switch or a layer 3 node serving as the default gateway for LAN users fails. Virtual Router Redundancy Protocol operates on the principle of a group of routers, or hosts, participating…
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HSRP Config – The Definitive Guide with Video, Diagrams, Configs, and Quiz
What is HSRP, Why do we use it, and How to do HSRP config on Cisco Router? HSRP is an FHRP (First Hop Redundancy Protocol) developed by Cisco to provide redundancy and high network availability almost anywhere in the network where we have two layer3 devices. HSRP config gives a group of routers a virtual IP address and a virtual MAC address to look like one router. If one router doesn’t work, the other router can be the default gateway. The virtual router does not exist; it is merely a target for routers to provide backup to one another. One router…
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Router on the Stick Configuration – Enterprise and Service Provider Example
The router on the stick configuration is a powerful and easy way to design your network. This method makes it very easy to add additional equipment to your network without the need to run a direct cable from your user device to the layer3 capable device. It is a networking terminology used to represent a layer3 device and a layer 2 switch where a single physical cable directly connects them. Here switch is a Layer 2 switch with multiple VLANs, and the router has all layer 3 IPs, and it handles all inter-VLAN communication. The port on the switch side…
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21 Done For You Behavioural Interview Questions and Answers 2021
Behavioural interview questions and answers are designed to learn about your past behavior, which relates to the job description and position you are interviewing for. The general belief is that your past behavior is predictive of your future behavior, so the interviewer wants to learn what you have done to understand better how you will perform in the future. In this blog post, I will provide you with interview tips on handling behavioral questions and provide sample answers. I have taken a sample company like Cisco Systems here because, as a Network Engineer, most people’s dream job is to work…
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