Consensus is a process of achieving agreement between distrusting nodes on the final state of data. To achieve consensus, different algorithms are used. The process of attaining agreement on a common state or value among multiple nodes despite the failure of some nodes is known as distributed consensus. Consensus is the backbone of a […]
In this article we will discuss different types of blockchain based on its evolution and usage. The categorization of blockchains is illustrated in the figure below: Distributed Ledgers A distributed ledger is a shared database. All blockchains technically fall under distributed ledgers. But, all distributed ledgers are not blockchains. A critical difference between a […]
In this article we will learn the basic concepts of blockchain technology like what is a blockchain? the blockchain architecture and how does a blockchain work? In 2008, a groundbreaking paper, entitled Bitcoin: A Peer-to-Peer Electronic Cash System, was written on the topic of peer-to-peer e-cash under the pseudonym of Satoshi Nakamoto. It introduced […]
Blockchain was introduced with the invention of Bitcoin in 2008. Its practical implementation then occurred in 2009. We will look at a chronological order of early history and computer networks and how they evolved and contributed to the development of Bitcoin in 2008. The order of events is: 1960s – Invention of computer networks 1969 […]
The emergence of Bitcoin in 2008, introduced to the world a new technology called blockchain which promised to revolutionize the entire society. Blockchain is the technology behind the success of Bitcoin. Blockchain is a technology that has an impact on current technologies and has the ability to transform them at a fundamental level. […]
In this article we will look at an introduction to Linux. You will learn what is Linux, various features of Linux and what are the reasons for learning Linux. What is Linux? Linux is a open-source and free operating system (unlike Microsoft Windows and Mac). It serves as a foundation for various distributions […]
This article provides links to all DCCN lab programs. Many of the lab programs are provided with textual links as well as video links to support a wide range of audience. Software required to conduct/perform DCCN lab experiments are Cisco Packet Tracer (CPT), Java and Network Simulator 2 (NS2). I request you to […]
Aim To implement TCP congestion control algorithm. S/W required NS2, Xgraph Background information Congestion is an important factor in packet switched network. It refers to the state of a network where the message traffic becomes so heavy that the network response time slows down leading to the failure of the packets. It leads […]
Aim To implement Link State Routing algorithm. S/W required NS2 Background information The Link State Routing Algorithm is an interior protocol used by every router to share information or knowledge about the rest of the routers on the network. The link state routing algorithm is distributed by which every router computes its routing […]
Aim To implement Distance Vector Routing algorithm. S/W required NS2 Background information Distant vector routing protocol also called as Bellman-Ford algorithm or Ford Fulkerson algorithm used to find the shortest route from one node to another node in the network. A distance-vector protocol calculates the distance and direction of the vector of the […]