Cloud Computing

Zainub Wahid Benefits of Cloud Computing, Cloud Computing, Community Cloud, DBaaS, FaaS, Hybrid Cloud, Infrastructure-as-a-Service, networking, Platform-as-a-Service, Private Cloud, Public Cloud, Software-as-a-Service, Virtualisation Leave a comment

Have you ever thought about starting your own E-Commerce business? If yes, you might have looked for possible options of hosting a platform for online business. One option that came to mind of every person starting his/her online business is to buy a server and manage online platform by themselves. But, have you ever thought of money you will spend while going through this option? This option requires a lot of money and maintenance. For example purchasing a server, cooling system, space, networking, scaling etc.

Have you ever thought of solving this issue? How easy will it be if you can just buy space online and you don’t have to worry about rest of problems like, space, networking, security, expansion. This concept of availability of specifications over the internet around the clock is known as cloud computing. Isn’t it interesting? Now, let’s move forward and check the technicalities of cloud computing.

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Introduction to Virtualisation

Zainub Wahid Cloud Computing, Full Virtualisation, hosted virtualisation, Hypervisors, para-virtualisation, Type-1 Hypervisor, Type-2 Hypervisor, Types of Virtualisation, Virtualisation 1 Comment

What are two basic components of Computer System? I think you all know this, i.e. Hardware and Software. Hardware includes Processor, RAM, Storage, Keyboard, Mouse etc. Software includes Windows, iOS, Ubuntu, Photoshop, Word, Excel, etc. We need one physical hardware to install any Operating System on it. These are few basics of Computer System everyone knows.

But, have you ever thought, what if you need four different operating systems? One way is to buy four different hardwares and install four different Operating Systems. Continue reading →

Bridge Protocol Data Unit (BPDU)

Zainub Wahid BPDU, Bridge Protocol Data Unit, IP Addresses, IP Addressing, LAN, network, Network ID, Network Layer, Network Topology, networking, Spanning Tree Protocol, STP, switch 2 Comments

Every network device starts communicating with other network device after making sure the other device is on and is working fully. But, how a network device can make sure other device is responsive? Network devices check other devices by sending Hello packets. Other devices after receiving Hello packets send Acknowledgement packets. Network devices usually transmit Hello packets after every few seconds. Continue reading →

Openstack Heat Orchestration Template

Zainub Wahid Heat, OpenStack, OpenStack Developer Leave a comment

Cloud and Automation are real buzzwords these days. The concept of “the cloud” is evolving day-by-day. The open-source community is working hard for evolving the cloud concept, helping cloud users and to provide every facility required by users. Openstack is an open-source software platform for cloud management.

Heat is an OpenStack component that provides a template to create different OpenStack resources like Instance, Router, Network, etc. Heat primarily manages infrastructure, but the templates integrate well with software configuration management tools. Continue reading →

Subnetting

Zainub Wahid IP, IP Addressing, Network ID, networking, Subnet ID, Subnet Mask, Subnetting, TCP/IP Model Leave a comment

Single IP is purchased by the company and this single IP is responsible for networking of all the departments in a company. Being interested in networking, this is the first question that comes in the minds, How a single IP can be used by all the departments? The answer to this lies in the concept of subnetting. So, the question arises, what is subnetting? Converting single IP into more networks is called subnetting. Continue reading →

How to Install and Configure Kafka?

Zainub Wahid Configuring Kafka, Installing Kafka, Installing ZooKeeper, java, Kafka, Kafka Service, Kafka Topics and logs, Producer, Running Kafka, ZooKeeper Service 1 Comment

Before installing and configuring Kafka, everyone should be aware of what is Kafka and why is it used. One might be wondering from where one can read and understand about the structure of Kafka. So, my previous post, What is Kafka and how it works?, will answer the above question. Before starting installation and configuration, I will recommend all to read my previous post.   Continue reading →

What is Kafka and how it works?

Zainub Wahid APIs of Kafka, Consumer, high-level kafka, Kafka, Kafka Cluster, Kafka Topics and logs, Producer, Streaming 1 Comment

Big Data is leading today’s industry and streaming that data in real time is very important and today’s need. Kafka is one of the stream line processor which can be used to stream big data in real time. So, now, let’s discuss what actually Kafka is and how it works.

Kafka is a distributed streaming platform having three capabilities:

  1. Publish and subscribe to streams of records, similar to a message queue.
  2. Store streams of records in a fault-tolerant durable way.
  3. Process streams of records as they occur.

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Difference Between OSI Reference Model and TCP/IP Reference Model

Zainub Wahid IP Addresses, network, Network Layer, OSI Model, OSI Reference Model, Physical Layer, Presentation Layer, TCP/IP Model, Transport Layer Leave a comment

Before moving towards the Difference of these two important models, question is, What is OSI Model and What is TCP/IP Model?

I already have discussed these two models in detail in my previous posts. Kindly visit, OSI Reference Model and TCP/IP Reference Model for understanding these two models in detail.

Lets start noting down all differences between these two models: Continue reading →

OSI Reference Model

Zainub Wahid Application Layer, Data Link Layer, network, Network Layer, networking, OSI Model, OSI Reference Model, Physical Layer, Presentation Layer, Session Layer, Transport Layer 28 Comments

A user from one country sends request and Google web search engine opens it for you, if net is connected to the PC. Have you ever wondered how all this is happening? NO? Mostly people don’t bother how things are happening around us. But Network Engineers do care about how communication is happening between two devices. And the best answer is “Understand OSI Reference Model”.
Let’s suppose we have small network and PC wants to communicate with Server.
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