- What is IPv6 ? Why should we care?
- How does ping work ? What about traceroute ?
- I type http://www.yahoo.com in my browser’s URL bar and I press enter. What happens ? (discuss at every OSI layer – Physical, data link, network, transport, session, presentation, application)
- DNS & anycast, IP, UDP, routing, BGP, TCP, HTTP, transparent proxy
- What is BGP?
- What’s a PTR in DNS? Why should we care?
- What if I change from http://www.yahoo.com to https://www.yahoo.com ?
- Public/private certificates, CAs, proxying, MiTM, etc.
- What happens when I press the send button in my email client ?
- How do we prevent bots crawling ? How would you deal with a syn flood ?
- How many hosts in a /24 network? What about a /22 ?
- What is the difference between DNAT and SNAT ? When do you use either ?
- What is a virtual IP address? What is a cluster?
- What is IPv6 ? Why should we care?
I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.
I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.
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