What is TCP and Why Should You Care?

When connecting two computers to exchange data, TCP (Transmission Control Protocol) is the go-to protocol for reliable and secure communication. In this blog post, we’ll be exploring exactly what TCP is, how it works, its advantages and disadvantages, and its role in DNS. Keep reading to find out more!

Explanation of TCP

TCP (Transmission Control Protocol) is an end-to-end transport layer protocol used to establish connections and exchange data reliably between two computers over a network. It is an integral part of the Internet Protocol Suite and provides a connection-oriented service between two hosts. Using the reliable and efficient TCP protocol, network applications can send data reliably over the network without complicated protocols such as FTP. With its reliable and efficient data transmission, Transmission Control Protocol is ideal for applications such as web browsing and data transfer services.

How does it function?

TCP uses a set of rules known as a transmission control protocol. This protocol establishes a reliable, connection-oriented link between two computers and transfers data in a series of bytes. This is achieved by breaking the data into small chunks and adding a sequence number to each data part. Then, the receiving computer reassembles the data in the same order it was sent. Additionally, Transmission Control Protocol also has features such as error checking, retransmission of lost packets, and flow control to ensure the reliability of the data transfer. By following this protocol, TCP can reliably send and receive data between two points, creating a foundation for all the information we communicate on the internet today.

Advantages and disadvantages of TCP

One of the main advantages of the TCP protocol is its reliability. Following the designated rules and sequence of the transmission control protocol, TCP ensures that data is reliably sent and received in the same order. As a result, network applications can be confident that the data they are sending or receiving is accurate and complete. Additionally, TCP’s built-in error correction and flow-control features guarantee that connection-oriented issues, such as resending lost packets and controlling the data flow, are taken care of automatically.

Despite its advantages, TCP also comes with some disadvantages. One of the most significant drawbacks of the protocol is that it can be slow, especially compared to other connectionless protocols such as UDP. Additionally, Transmission Control Protocol requires an extensive amount of additional overhead information, resulting in more network traffic. This can lead to slower speeds and higher latency on networks with limited bandwidth. Finally, TCP is connection-oriented, meaning it cannot function properly on connectionless networks such as mobile networks. For these reasons, other protocols, such as UDP, are sometimes used instead.

The role of TCP in DNS

TCP plays an essential role in DNS (Domain Name System). It is explicitly used for resolving domain names, which means it sends the queries to the correct server and receives the response. To accomplish this task, Transmission Control Protocol uses a three-way handshake to establish the connection, followed by an exchange of requests, and then the client receives the response. After the response is received, the relationship must be closed. This is known as “graceful shutdown” and is handled by TCP. In this way, it provides an essential service to DNS, ensuring that data transmission is reliable and secure.

TCP monitoring – Everything you need to know


TCP is an essential part of the Internet Protocol Suite and is reliably used to send and receive data between two points. It provides an invaluable service to network applications with built-in error checking, retransmission capabilities, flow control, and gracefully closing connections. If you’re curious about how TCP works and why you should care, start by understanding its features, applications, and security implications.

The Basics of DNS Monitoring

The Domain Name System (DNS) is vital for your business to be accessible online. It is an essential element of your infrastructure, but its correct functioning can be stopped by different situations, at any time, hardware failure, configuration errors, cyber-attacks, etc. Therefore, it requires a permanent inspection to troubleshoot fast and avoid issues as much as possible.

DNS monitoring is a solution that can help you a lot in executing these tasks. Let’s explore its basics for a better understanding.

What does DNS Monitoring mean?

DNS monitoring service means the methodical inspection of your DNS infrastructure to guarantee its correct functioning. The constant execution of this process provides valuable information about different details related to the DNS of your business. Besides, it gives certainty about the overall status and performance of the DNS. Fast detection of issues and troubleshooting are some of the benefits of DNS monitoring. Moreover, it is a solid base to build your prevention and security strategies. Fixing before issues grow big means extra benefits for your budget.

Implementing Domain Name System monitoring means tight supervision of your DNS and its elements. DNS records (PTR, SRV, NS, MX, SOA, etc.), firewalls, IP addresses, servers (primary and secondary), traffic (incoming and outgoing), and more. It will check every detail of the DNS performance. It has the necessary features to detect errors or abnormal behavior and to report such situations to the responsible IT member, to react.

The Basics of DNS Monitoring

  • DNS monitoring’s design includes modern technology to offer you tight inspection and details (information) of your DNS performance.
  • It is the most effective way to check your DNS and be aware of its functioning 24/7.
  • It does not fix issues, but it reports them fast for an expert to take action.
  • You or your IT team can monitor the DNS of your business, or you can get the service from a third party.
  • Downtime is another threat to your business and income. Different factors can cause it, and some can directly relate to the DNS. There is a big difference between discovering a failure after an hour or two and immediately. If your domain can’t be resolved, this will translate into errors and a poor experience for users. This is another area in which DNS monitoring can be very helpful. Some issues can be detected and fixed before they affect users.
  • Security is critical for all websites, applications, and networks. Customers need to trust your business to buy from you (products or services). Unfortunately, cybercrime is a constant threat you should not neglect. Cybercriminals can target your business and customers from remote locations and different time zones at any time. Criminals know, as well as you, the relevance of your DNS, so it is not rare they attack this infrastructure. DNS monitoring can detect the threat and report it to you to stop it. DNS monitoring truly contributes to strengthening your security.

Suggested article: Premium DNS: How to get started?


DNS monitoring is a sharp-eyes vigilant. It can be your next big partner!

Premium DNS: How to get started?

If you are getting many DNS queries for your domain, and your current nameserver or nameservers can’t handle it, you need Premium DNS. It is a service that will facilitate your domain’s DNS resolution and better manage the DNS queries.

What is Premium DNS?

A Premium DNS is a paid DNS service for managing your domains. The difference from a free DNS plan will be in price, performance, additional features, higher limits on resources (NS records, DNS queries, etc.), or even unlimited resources in some cases.

Before you purchase a Premium DNS plan

  • Which market or markets do you target?

Check where the potential DNS providers have their DNS servers. Even the global providers don’t cover the world equally.

  • How many DNS queries per month your DNS service must be able to handle?

There are some unlimited plans, but they might be out of your reach. Check how many queries you need. You can do it with a Free plan and check when you will reach your limits.

  • How many DNS records do you need?

Even Premium plans have limits on the number of DNS records. So yes, you will probably be able to host thousands of records, but still, it is good to know in advance.

  • Do you need any additional features?

DDNS, DNSSEC, load balancing, GeoDNS, etc. There are plenty of useful features that only Premium plans offer. Check what you need.

Compare Premium DNS providers

When you finally know what you need, go ahead and check the Premium DNS providers. Compare their prices and offers. See what works best for you.

Purchase Premium DNS

Now that you have already made your choice get familiar with its interface. Check the menus and how everything works. If you don’t like how it works, usually there is a period with a money-back guarantee.

  • Choose the nameservers you want to use

There will be multiple nameservers available. Start using those that are located in places close to your visitors. That way, the queries will get answered fast, and the performance will be better.

  • Redirect your domain from your registrar or previous DNS provider

Otherwise, the new ones won’t start working properly.

  • Create Primary or Secondary DNS zones

Depending on your needs, you will need a Primary zone or zones in which you can host your DNS records and Secondary DNS zones for better performance.

  • Create DNS records inside the Primary DNS zone.

Inside the Primary zones, you can add the records you need: A, AAAA, MX, CNAME, etc. The Secondary DNS servers will copy the information from the Primary and will offer it to the public.

Activate additional features

Now that everything is working, you can also start using the advanced features that only Premium DNS plans offer.

Activate a DNS monitor to keep an eye on your network and add Failover in case of problems.

Create load balancing methods and increase the performance.

Put attention to security with DNSSEC, DMARC, DKIM, SPF, etc.


Now you know how to get started with Premium DNS. Go ahead and enjoy your awesome new DNS service.