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green and gray computer and server

What Is a DNS Server?

To know about a DNS server, first, we need to elaborate on what a server is. A server is a device or software that provides services to other programs known as ‘clients.’ DNS clients, which are included in most current desktop and mobile operating systems, allow web browsers to communicate with DNS servers.

What is a DNS server?

The Domain Name System (DNS) is the Internet’s phonebook. When users input domain names like ‘google.com’ into web browsers, DNS is in charge of determining the correct IP address for those sites. Browsers then use the addresses to interact with origin servers or CDN edge servers to access website information. This is made possible by DNS servers, which are machines specialized in responding to DNS requests.

A DNS server’s goal is to convert what users put into their browser into something that a computer can understand and use to find a website. In other words, its function is to translate a domain name like www.example.com into an IP address like 71.232.101.120.

Thanks to DNS servers, people no longer have to memorize complicated IP addresses such as 216.58.217.206, Google’s IP address. They only need to remember www.google.com.

This translation process, known as DNS resolution, necessitates the use of many hardware components. The primary DNS server is the most critical.


How do DNS servers respond to DNS queries?


Four servers work together to send an IP address to the client in a standard DNS query without caching: recursive resolvers, root nameservers, TLD nameservers, and authoritative nameservers.

The DNS recursor (also known as the DNS resolver) is a server that receives the DNS client’s query and then communicates with other DNS servers to find the proper IP address. When the resolver gets the client’s request, it acts as a client, contacting the other three types of DNS servers in search of the correct IP address.
The resolver begins by querying the root nameserver. The root server is the initial stage in converting human-readable domain names into IP addresses (resolving). The root server then answers to the resolver by providing the address of a top-level domain (TLD) DNS server (such as.com or.net) that holds information for its domains.

The resolver then requests the TLD server. The TLD server returns the IP address of the domain’s authoritative nameserver. The recursor then contacts the authoritative nameserver, responding with the origin server’s IP address.

Finally, the resolver will return to the client the IP address of the origin server. Using this IP address, the client may then submit a query straight to the origin server, and the origin server will react by returning website data that the web browser can decode and display.

What exactly is DNS caching?


Recursive resolvers can resolve DNS requests utilizing cached data in addition to the procedure described above. The resolver will save the correct IP address for a particular website in its cache for a limited length of time after getting it. If any additional clients submit requests for that domain name during this period, the resolver can skip the regular DNS search procedure and just respond to the client with the IP address held in the cache.

a webite with cdn seurityagainst ddos attacks

Increased Security with CDN

DDoS attacks have grown in popularity as a method for cybercriminals to launch an attack against your website. They don’t require any hacking skills and are all about flooding your website with traffic. A cybercriminal can purchase a botnet for a few dollars and launch a massive amount of traffic to your site with the intent of slowing it down or rendering it inaccessible entirely. Another reason for their popularity is that they are usually used with another cyberattack. DDoS attacks serve as a decoy while a more dangerous attack, such as SQL injection, is launched against your website. SQL injection is an attack in which malicious SQL statements are inserted into a database entry for execution. It enables cybercriminals to impersonate others.

What exactly is a CDN?

The term “content delivery network” (CDN) refers to a system or network of geographically distributed servers worldwide that aims to deliver web content from the origin server to end-users from anywhere in the world. It accomplishes this by storing a cached or copied version of your website’s web page, including the elements required to load, such as HTML, CSS, Javascript, images, and videos.
When a website visitor wants to view a specific web page, a request is sent from the user’s computer or mobile device. All submissions will be routed to the origin server if a CDN is not used. Even in the absence of a DDoS attack, high traffic volume can overwhelm the origin server, resulting in a server crash.

This ability to handle high traffic volumes is also helpful in dealing with unusually high volumes of traffic caused by DDoS attacks. The sheer capacity of cloud CDN solutions’ IT infrastructure can absorb the most potent low-level DDoS attacks.

Tools for Proactive Monitoring and Cleaning

Of course, simply absorbing high volumes of traffic will not suffice. As a result, top CDN operators have various tools to protect websites from multiple types of attacks. These tools are capable of proactive monitoring for potential attacks and inspection and cleansing of traffic for unnatural and harmful visits.

All five major TLS extensions are supported.

TLS, or Transport Layer Security, is a protocol that provides authentication, privacy, and data integrity between the origin server and the CDN server and then between the CDN server and the end-user.

Green Plus CDN, as one of the leading CDN platform providers, supports all five major TLS extensions, including HTTP/2, OCSP Stapling, Dynamic record sizing, ALPN, and Perfect forward secrecy.

green and gray car. How blockchain affect automative industry

Blockchain and Automotive Industry

From components suppliers and manufacturers to consumers and safety regulators, every aspect of the complex automotive industry ecosystem relies on a network of transactions and knowledge. This process starts long before a car is created and continues long after being purchased. The quantity of data that automobile industry companies must keep track of is expanding, from support for developing hardware and services to identifying the source and location of faulty or counterfeit parts. With a shared record of ownership, location, and movement of components and items, Green Plus Blockchain can help increase efficiency, transparency, and trust. Furthermore, the flexibility of blockchain records makes them ideal for keeping up with emerging business models.


Vehicles are increasingly required to include secure, seamless mobility services and the ability to handle micropayments and other interactions with ride-sharing services, intelligent transportation infrastructure, and electric vehicle charging. With Green Plus blockchain, tolls, congestion fees, electric charging, parking, and even payments between automobiles are all possible. With access to the trunk, the system can also allow a car to be utilized as a certain drop point for parcels.


Traceability is critical in this market for knowing a vehicle’s post-sale movements. Makers must trace vehicle movements for regulators and buyers to ensure safety and dependability.
Because of its traceability and transparency, Green Plus blockchain is ideal for tracking purchases, shipping arrangements, dealer transactions, and millions of micropayments in mobility services. Smart contracts built on the blockchain go far beyond tracking and visibility, allowing cash to be released only after a satisfying delivery.

insurance and blockchain

How Blockchain Affects Insurance Industry

At the core of the insurance sector, blockchain can simplify and safeguard multi-party operations. Whether you’re dealing with consumers or other parties, Blockchain technology can help you avoid the problems that come with many parties keeping their records. Insurers may use blockchain’s distributed ledger technology to update and validate information against other documents in the network as transactions occur, lowering policy, claim, and relationship management costs, streamlining processes, and improving customer satisfaction. Companies can also generate new revenue and possibilities by developing new business models or insurance products.

In its most basic form, blockchain is a data format that allows for the construction of a digital ledger of transactions and the sharing of such ledgers over a dispersed network of computers. The main advantage of blockchain is that it establishes trust between parties that share data. The information is shared in the form of an electronic list of records or blocks that is encrypted. It can’t be deleted, which helps to maintain user confidence. Once information is recorded, it cannot be modified without modifying all of the other records, ensuring safe user transactions. We can see how this might benefit the life insurance sector since it ensures that data is accurate, safe, and reliable.


A transparent blockchain technology that allows several organizations to compile relevant information can speed up claim recovery. Its shared ledger features can aid insurers in reaching agreements on claims, establishing confidence in the sharing of evidence, and improving the entire customer experience.
Our shared ledger openness can aid employers in reducing mistakes, resulting in better claims processing, provider management, and cheaper operating costs.


From managing contacts among reinsurers to keeping shared accounts and managing claims payments, blockchain helps assure contract certainty and increase risk-handling skills. Blockchain can reduce the requirement for participating firms to balance their reinsurance accounts regularly by providing transparency across the entire value chain.

blockchain and aviation industry

How Blockchain Technology Helps Aviation Industry

Today, one of the significant challenges of the aviation industry is to ensure flight safety. Green Plus, as a leading company in the field of technology, offers a practical solution regarding this matter.

Blockchain technology, which has become very popular recently, offers solutions to various problems, including challenges regarding aviation industry safety. Using this technology, all of the aerial information of an airline is distributed to authorized companies and organizations to access the data live and online.

Hyperledger Fabric Blockchain is a private blockchain with the ability to define different accesses, allowing all its authorized users to access data at their access level. For instance, all aircraft information in a country’s sky can be made available to all domestic airports, air defense, etc. live. On the other hand, all private information related to military aircraft will only be available to authorized organizations, and others will not have access to it. Compared to other existing technologies, the most crucial feature of this technology is its obscurity and immutability, which help prevent any disruption and falsification of records. Green Plus blockchain technology ensures you that its information is highly reliable. Another unique feature of this technology is having constant access to updated information, which allows its users to instantly issue the necessary commands based on the latest changes and gives senior executives the upper hand.

In conclusion, private blockchains are restricted and usually limited to business networks. A single entity, or consortium, controls membership, and there is no way of falsifying the data. This feature will help businesses, including airlines, significantly improve safety and access to up-to-date information.

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Smart Contracts on Blockchain

Traditional contracts can often be problematic. However, smart contracts have risen to solve a lot of these complications. Some of the most critical issues that smart contracts can tackle are problems that involve financial transactions, data accuracy and transparency, speed, and security.

Smart contracts are essentially programs recorded on a blockchain that run when specific criteria are met. They are often used to automate the implementation of an agreement so that all participants are instantly sure of the outcome, without the participation of an intermediary or waste of time. They can also automate a workflow by initiating the next operation once specific conditions are met.

The goal of intelligent contracts, which are written into code on a blockchain, is to simplify business and trade between anonymous and recognized individuals, sometimes without an intermediary. An intelligent contract reduces the formality and expenses associated with traditional techniques while maintaining authenticity and legitimacy. Smart contracts are often used to automate the implementation of an agreement so that all players may be confident of the conclusion instantly, without the participation of an intermediary or the loss of time. They can also automate a workflow by initiating the next operation once specific conditions are met.

How smart contrats work

Intelligent contracts operate by executing basic “if/when…then…” phrases typed into code on a blockchain. When preset circumstances are met and validated, a network of computers conducts the activities. These activities might include transferring payments to the appropriate parties, registering a vehicle, providing alerts, or issuing a ticket. Once the blockchain is updated, the transaction cannot be altered, and the results are only visible to persons who have been granted permission on the network.

Benefits of smart contracts

A critical advantage of smart contracts is that the agreement is instantly executed. Since smart contracts are digital, paperwork will be eliminated, and no time will be wasted correcting errors that frequently occur when filling out forms manually. Another advantage is that they significantly increase trust and transparency. There is no need to question whether information has been manipulated for personal gain because no third party engaged and encrypted transactions are transmitted between participants, so they are immutable. Security is also a significant benefit smart contracts bring. Blockchain transaction records being encrypted leads to data security in a way that your information will be tough to hack. Furthermore, because each record on a distributed ledger is linked to the preceding and subsequent entries, hackers would have to modify the entire chain to change a single record.

A distributed ledger can be used to store contracts entirely digitally. Blockchain infrastructure assists in developing trust, assuring you that your money will be handled appropriately. This is how you may transfer your money to the smart contract so that once the target is met, the funds will be immediately sent to the receiver. The smart contract can never be altered after it is formed. Since everyone on the network confirms the contract’s output, the fund cannot be released forcibly. These benefits have caused many banks, insurance companies, and postal corporations, among others, to utilize smart contracts instead of the traditional method of organizing transactions. Banks can use these contracts to issue loans or to offer automatic payments, and insurance companies could use them to process specific claims. Postal companies could get help from them for payment on delivery. All businesses can benefit from this system, and these were only a few examples to clarify the use cases of smart contracts.