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Most trusted JOB oriented professional program
DevOps Certified Professional (DCP)

Take your first step into the world of DevOps with this course, which will help you to learn about the methodologies and tools used to develop, deploy, and operate high-quality software.

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DevOps to DevSecOps – Learn the evolution
DevSecOps Certified Professional (DSOCP)

Learn to automate security into a fast-paced DevOps environment using various open-source tools and scripts.

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Get certified in the new tech skill to rule the industry
Site Reliability Engineering (SRE) Certified Professional

A method of measuring and achieving reliability through engineering and operations work – developed by Google to manage services.

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Master the art of DevOps
Master in DevOps Engineering (MDE)

Get enrolled for the most advanced and only course in the WORLD which can make you an expert and proficient Architect in DevOps, DevSecOps and Site Reliability Engineering (SRE) principles together.

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Gain expertise and certified yourself
Azure DevOps Solutions Expert

Learn about the DevOps services available on Azure and how you can use them to make your workflow more efficient.

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Learn and get certified
AWS Certified DevOps Professional

Learn about the DevOps services offered by AWS and how you can use them to make your workflow more efficient.

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Networking and Engineer Interview Questions and Answer – Part 3

  • What is localhost and why would ping localhost fail?
  • What is the similarity between “ping” & “traceroute” ? How is traceroute able to find the hops.
  • What is the command used to show all open ports and/or socket connections on a machine?
  • Is 300.168.0.123 a valid IPv4 address?
  • Which IP ranges/subnets are “private” or “non-routable” (RFC 1918)?
  • What is a VLAN?
  • What is ARP and what is it used for?
  • What is the difference between TCP and UDP?
  • What is the purpose of a default gateway?
  • What is command used to show the routing table on a Linux box?
  • A TCP connection on a network can be uniquely defined by 4 things. What are those things?
  • When a client running a web browser connects to a web server, what is the source port and what is the destination port of the connection?
  • How do you add an IPv6 address to a specific interface?
  • You have added an IPv4 and IPv6 address to interface eth0. A ping to the v4 address is working but a ping to the v6 address gives you the response sendmsg: operation not permitted. What could be wrong?
  • What is SNAT and when should it be used?
  • Explain how could you ssh login into a Linux system that DROPs all new incoming packets using a SSH tunnel.
  • How do you stop a DDoS attack?
  • How can you see content of an ip packet?
  • What is IPoAC (RFC 1149)?
  • What will happen when you bind port 0?
Rajesh Kumar