Tag: DNS

User Datagram Protocol

Today we will explore the User Datagram Protocol. First, we will explain its purpose, and then we will see its history and how it was created. Finally, we will explore its applications and the differences between UDP and TCP/IP.

The purpose of the User Datagram Protocol 

UDP stands for User Datagram Protocol. It is a key component of the Internet protocol suite. It allows us to link various Internet services with minimal latency and loss tolerance.

The User Datagram Protocol speeds up communication by allowing data to be delivered before the recipient agrees. As a result, for time-sensitive communications such as DNS lookups, Voice over IP (VoIP), video, or audio transfers, User Datagram Protocol is the preferable technique.

Advantages and Disadvantages of UDP

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ALIAS record

We are going to explore one alternative to the CNAME record, which has many advantages – the ALIAS record. With it, you can have different DNS records in the same DNS zone and even put ALIAS records inside the root. Put ALIAS records where you can’t do it with CNAME records and manage your DNS easier. 

ALIAS record

The ALIAS record is one of the DNS record types which serves to connect one hostname to another. After that, it will resolve to A or AAAA record (an A to IPv4 address and an AAAA to IPv6 address) that already exists for the second hostname. ALIAS has the benefit of being allowed for the root domain, and you can put it in a DNS zone with other DNS records like MX records.

Benefits of using ALIAS DNS record

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TTL

Let me tell you a funny story that will show you the importance of TTL when sending packages. 

Back in the day, in 1971, there was a programmer called Bob Thomas who was working on mainframe computers. He got bored and decided to play around. After a while, Bob created a small software called the Creeper and released it on the network. It was a tiny code with the message “I’m the creeper: catch me if you can”. Ray Tomlinson, a colleague of his, added the functionality and allowed the code to copy itself. This was the first computer virus. The virus was unstoppable because there was no antivirus at this time, and it had no TTL, so it could go around the network forever. The co-creator Ray needed to invent the first antivirus to stop it. Otherwise, it could still go around for a long time. 

So what is TTL in networking? 

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Domain flipping

This is a beginner’s guide to domain flipping. Here we will show you your first move from buying a domain name to selling it for a profit.

Domain flipping in a brief

Domain flipping is the practice of buying domain names that have potential and reselling them later for a profit. The domains can be cheap with interesting names, or they can be expensive. The goal is to find interesting available domain names, and later to be able to find a potential buyer who is willing to spend the price you want.

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DNS propagation

Internet is a hard game. Managing a website or a network demands constant changes to your strategy. Expansion, to be more visible, efficient, competitive, etc., are common triggers of change. That directly pushes DNS modifications and daily challenges for administrators.

What’s DNS propagation?

DNS propagation is the time period that it takes to update DNS modifications all across the Internet.

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