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- 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 a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market tips at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at I reviewed , and SEO strategies at Wizbrand.
Please find my social handles as below;
Rajesh Kumar Personal Website
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Rajesh Kumar at WIZBRAND
