Dynamic DNS (DDNS) – Why use it?

Posted on January 8, 2021 by Josh

DDNS or Dynamic DNS is a DNS service that can be useful to many. It is an automatic method for updating IP addresses that saves you from having a banned IP address that you can’t use or a paid static IP address, that might be very expensive.

The problem 

Suppose you are hosting an application, a site, or a service on your computer, and you do not have professional-grade internet. In that case, the chances are that you will have an IP address that will be auto-assigned by the Internet service provider (ISP). That address will auto-change over time, and you won’t be able to do more about it. 

The problem comes when you are providing a service to people over the internet. They have your IP address to connect to your server or a device. But the ISP changes it, and now they can’t reach it. You need to update it manually and suffer downtime. 

This could have been 100% evaded with Dynamic DNS (DDNS)!

What is DNS? 

Before examining Dynamic DNS and its benefits, let’s quickly see what DNS is. DNS – domain name system. It is the hierarchy organization that the internet uses for linking domain names and the hosts’ IP addresses. 

In short, it is the magic that converts the domain names that you are writing in your browsers to the IP addresses of those sites. That way, you don’t need to remember IP addresses like 173.194.37.84 or 66.94.230.32 and write Google.com or Yahoo.com in your browser. 

What is Dynamic DNS (DDNS)?

Dynamic DNS is a tech that auto-updates nameservers. It will refresh the DNS records (A and AAAA DNS records) when the IP of the host changes for any reason. 

The A and AAAA records are the one that connects the domain name with its IP address. The A is for IPv4 addresses and the AAAA for IPv6 ones. 

That way, people who want to connect to the host will get updated A or AAAA records, and they will be able to connect. 

The DDNS client continually checks for changes in the IP addresses. When the IP address changes, this triggers the DDNS to update. 

Benefits of DDNS

Easy to use. You need to set it up once, and then you are ready to go. In the case of IP cameras for surveillance, you will need to set up your router by going to settings and put the user and the password for your DDNS service. Done! 

Cheaper than static IPs. Yes, if you have many devices, it will be a lot cheaper to pay for one DDNS service than to pay for each static IP address. 

Keeps you online. As we mention, this will reduce downtime by auto-update the IP addresses, and the devices or services will keep been available through the net.

Suggested article – Best Wi-Fi routers in the world – TOP 5. (2020)

Alternatives to DDNS

You have 2 alternatives to Dynamic DNS: 

Static IP address. In case you have just one device, a server, for example, you can go on with a single IP address. It gets massively expensive if you need more devices.

Manually change IP addresses. Maybe it is not mission-critical to have your device online always. If you can manually adjust its IP address by manually go and change the settings that that doesn’t bother you, go on. 

Conclusion

DDNS is an extremely useful tech. It can save you a lot of hustle and money. In some cases, it could be the only reasonable solution for a problem. Check it out if you need to provide services, or you want to connect many devices and use them over the internet (like CCTV cameras).

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Why does Load balancing matter?

Posted on September 27, 2022 by Josh

Let’s see one analogy. Imagine you have a single worker at your office. This worker can write and answer around 10 emails per hour. When there are 2-3 emails per hour, he or she is doing more than fine. But, if there is a sudden work surge because of a problem, this person will start to receive more emails that he or she can handle well. He or she will start suffering, and eventually, the traffic of emails will be so strong that the person won’t be able to do the job completely. That could be avoided if there were more workers that could balance the load. Here comes the load balancing.

What is Load balancing?

Load balancing is a technique to manage tasks or traffic between a group of servers. The tasks/traffic will be distributed between the multiple servers, and none of the servers will have to process all of it. As a result, there will be less stress on the individual servers and a more resilient network that can manage large traffic volumes.

The Difference Between DNS load balancing and Hardware load balancing

Why does Load balancing matter?

Load balancing matters because, without it, the whole system can crash easier. Every system has its limits. Too many tasks or traffic can completely overwhelm it and lead to a crash. That can lead to extended downtime and many lost opportunities. So if you want to keep your business online, this service can really help.

It is worth having a load balancing mechanism so there is no single device that gets overworked. Any element, like a server, for example, can get too substantial traffic, and this will push it to its limits. When a computer works at its maximum, it will generate a lot of heat, and a long period of heat can damage different components.

Load balancing can divide tasks and traffic based on different algorithms. For example, it can manage the traffic based on the geolocation of the visitors, based on servers’ occupation, or simply redirect the traffic, equally between the available servers.

It can also redirect the traffic in case of a server failure. Yes, load balancing really matters as downtime prevention. Different load balancing automatically detects when a server is down and redirects the traffic to another one. Combined with a good monitoring service, it is possible that the server can indicate when it gets back online and unite to the group task.

In addition, it can save you from attacks like DDoS. If you have a vast network of servers, even if the DDoS attack is strong, the traffic will still be within the network’s ability, and none of the servers will go down.

Conclusion

A load balancing mechanism is a smart way to divide traffic or tasks. It can reduce the stress on the system and prevent a single point of failure. A better-managed network is more resilient to changes in traffic and attacks. The more servers you have in your load balancing, the stronger traffic you can manage. If you are considering this service, be sure it offers enough servers for your needs and that they are located where you need them.

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IPv4 – Everything you need to know

Posted on May 23, 2022 by Josh

If you’re looking for an explanation of IPv4, you’ve come to the right spot. We’ll look at its function, as well as its structure and how to check it, in this post.

IPv4 – What is its definition?

IPv4 has been around since the early 1980s, can you believe it? It is the fourth version of the Internet Protocol, first released in 1981. Its goal is to establish communication norms, such as how data packets should be conveyed and how they must be received.

IPv4 has one distinguishing feature: it uses the best-effort delivery approach. It is not necessary to make any last changes between the two ends for the connection to work. Instead, you might try to send a message without waiting to see if it was correctly sent. That is why it is ideal for use on the Internet.

IPv4 addresses are short and straightforward. Therefore, they act as an identification card for any connected host.

Structure

The structure of an IPv4 address is straightforward and looks like this: x.x.x.x. The x represents an octet with a value ranging from 0 to 255. Every IP version 4 address has four octets and three dots because the digits are separated by dots.

It’s a 32-bit number that identifies a network interface on a computer. Every number represents an 8-bit field that represents one byte of an IPv4 address. The dotted-decimal format is commonly used to describe the interpretation of bytes in an IPv4 address.

How to check IPv4?

Finding your IP address is straightforward. A dynamic IP address is one that changes frequently. The following steps will help you determine your computer’s IP address:

  • On Windows

Go to the Start menu and type cmd to launch the Command Prompt. Then type ipconfig into the Command Prompt and press Enter. The data given by the program will include your IP address.

  • On a Mac

Open the Terminal program. To get your public IP address, use the macOS Terminal command curl ifconfig.me. Enter ipconfig getifaddr en0 to find the private Internet Protocol version 4 address.

  • On Linux

To begin, open a terminal window. There are three commands for checking Internet Protocol version 4: “hostname -I,” “ip addr,” and “ifconfig“. Each of these commands returns the IPv4 address. 

Conclusion

IPv4 has evolved over time and has maintained a good reputation. Even though it is still in high demand, this resource has been scarce for a long time. Every day, more devices require connectivity, and IPv4 is already insufficient. We’ll have to upgrade to the latest protocol version sooner rather than later.

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Premium DNS vs Free DNS: Which one to choose?

Posted on February 17, 2022 by Josh

Inexperienced and newcomers to the Domain Name System world frequently have questions about the Premium DNS vs Free DNS comparison. Can we only use the Free DNS, or do we need to apply the Premium DNS? In today’s article, we’ll take a closer look at these DNS plan types and what they offer. So, let’s begin.

What does Free DNS mean?

This service provides the foundational DNS infrastructure that allows websites to function online. It is completely free. 

If you own a website that does not yet have a lot of international traffic, Free DNS is for you. Start-ups, small or local businesses, and blogs, for example. Free DNS will provide you with a stable domain, average speed, and site management features.

What Free DNS offers?

There are numerous free DNS hosting providers available on the market. They differ in their features, but in general, a free DNS service can provide:

  • Manage your DNS records and domain zones 
  • Multiple domains on a single account
  • Dynamic DNS
  • The UI is simple to use
  • Small amount of monthly queries
  • Customer support

What exactly is Premium DNS?

It’s a premium service that adds more functionality to your website to make it perform more smoothly. Usually, you have to pay to use it. 

Premium DNS is for you if you have a large amount of traffic to manage and a global presence. In this situation, continuous uptime is critical for replying to millions of queries from all over the world. In addition, it is beneficial if you need a high level of security to ensure transactions and data protection for your users.

What does Premium DNS provide?

In general, a Premium DNS service can provide the following features:

  • Load balancing solutions
  • More DNS zones
  • Guaranteed uptime
  • Faster speed and loading time
  • User-friendly interface
  • Millions or unlimited queries
  • Anycast DNS service
  • DNSSEC
  • DNS failover
  • 24/7 professional support

Premium DNS vs Free DNS – the distinction

It is important to make a distinction between Free DNS vs Premium DNS. Both are viable possible options. Always consider your actual company needs when choosing one of them. Usually, a Free DNS is less secure and has higher downtime, but it still works. Premium DNS features increase its dependability. Higher levels of security, speed, and uptime are not to be overlooked. They significantly improve the performance of web pages. Such characteristics entice users and search engines to impact positively. Think about it and make the best decision!

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5 DNS record types – Quick Guide

Posted on November 29, 2021 by Josh

Here is a quick guide to easily understand some of the DNS record types. All of them have a different role that is essential for the normal functionality of your Domain Name System (DNS).

SOA record

Start Of Authority record or, for short, SOA record is crucial to explain this record before all of the rest DNS record types. It shows the beginning of the authority DNS zone. This DNS record contains very valuable data for the DNS zone. If you want your network to operate normally without difficulties, this DNS record is a must-have. It points to the primary DNS server. The SOA record keeps the information and contact details about the DNS administrator. It also holds several parameters, for instance, the domain serial number. Note that you should have only one SOA record per DNS zone.

A record

We can’t skip mentioning the A record. Perhaps it is the most popular and well-known of all of the other DNS record types. It is also known as an address record, and its main goal is to link a hostname to its corresponding IP address. The A record is applying only for IPv4 addresses (32-bit). For IPv6 addresses (128-bit), there is a different DNS record – AAAA record. 

Therefore, the A record of your website includes the host and the host’s location (IPv4 address), type (A), and TTL (time to live). 

CNAME record

The CNAME record basically points to the actual canonical domain name for a domain or a subdomain. This DNS record type quite well fits for all of your subdomains. By creating a CNAME record for each of them, they link to your domain name. That way, you are not required to make any additional DNS records for your subdomains.

If you make a new change to the DNS records for your domain, they will automatically apply for every one of your subdomains. The administration of your DNS is so much easier that way.

PTR record

The PTR record is another fundamental DNS record. With it, you are making sure that sending emails to anyone will perform without any difficulties. The PTR record is additionally known as pointer record, and its primary objective is quite the opposite of the A record. It points an IP address to a domain name. It is also essential for Reverse DNS. After you send an email, the receiver could want to confirm that that email is sent on your behalf and not someone else. The PTR record is especially used for that purpose. Be careful when you are configuring the PTR record. Your emails could land in the spam folder of your recipients, and nobody wants that.

The pointer record could be used with IPv4 addresses and A records or with IPv6 addresses and AAAA records. 

MX record

The MX record, or mail exchanger record, points to the mail server accountable for receiving the incoming emails for a domain name. 

The MX record includes the domain’s name, the mail receiving server, type (MX), TTL, also the priority of the mails. 

In addition, make sure to set it up correctly, or you could end up with an empty inbox and not receiving any messages.

Dynamic DNS (DDNS) – Why use it?

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What is a Secondary DNS Zone?

Posted on August 2, 2021 by Josh

Implementing the Secondary DNS zone is a great choice to keep a reliable copy of your data. Let’s make things a little bit more clear and explain more about it. 

DNS zone explained.

The DNS server is capable of holding a lot of zones to manage the DNS namespace more accurately. As a piece of that namespace is the DNS zone. It is a section that provides more organized and easy to control DNS components.

In order for your domain to work properly and accurately, you should have to point it to different servers, for example, mail servers, web servers, etc. To complete this task, you have to create multiple DNS records in the DNS zone.

All of your DNS records are going to be stored in the DNS zone. Furthermore, the existence of the Domain Name System is based on that one piece. The reason for this is that every part of it exists in a zone.

A DNS zone can be applicable for .com, example.com, info.example.com. However, if we examine a subdomain as a website on its own, that will need management on its own. This is because the subdomain could require a separate zone.

The DNS zone includes essential information about the DNS records, also contact information about the DNS zone administrator. It also contains zone parameters like Refresh and Retry rate described in the SOA (Start of Authority) record. 

What is a Secondary DNS zone?

It is a read-only copy of the DNS records you built in your Primary (Master) DNS zone. It is also named Slave or Backup DNS zone. It is crucial to understand that the DNS records, such as A or AAAA records, MX records, etc., cannot be attached straight to the Secondary DNS zone. The single way for your Backup zone to get the records you have renewed is through the Primary (Master) DNS zone of the DNS server. So if you require to maintain your DNS records in the Backup zone, you can do it just at your master server. 

One of the main ideas of a Secondary DNS zone is to assist as a backup. So if your Primary DNS zone is not working for some reason, that is not going to disturb you. This Backup zone will serve and yet respond to requests for the zone from its copy.

DNS zone transfer

It is a simple task to copy the data from the Primary DNS zone to the Secondary DNS zone. This process is also known as DNS zone transfer, which you can complete this task through two types of zone transfer.

  • Full zone transfer (AXFR) – This is a full zone transfer. The whole zone file will be copied in the Secondary DNS zone.
  • Partial zone transfer (IXFR) – In this situation, the Secondary servers are going first to examine all the latest changes. For example, if there are deleted and added DNS records that appeared after their last update. After that, they are going to get only the new ones.
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SOA record – Why is it important?

Posted on May 10, 2021 by Josh

There are many different DNS records. Some are very specific. Others are common and exist in any DNS. SOA record is one of these common, always present DNS records. Let’s see what it does and why it is so important to have it!

What is the SOA record?

SOA record is a key DNS record that indicates the start of authority. The authoritative name server (authoritative NS) is the top source of DNS information. It is the first DNS record that a zone file contains and sets the general properties of that zone. It also has more details about the zone transfers like the refresh rate, the retry rate, and who is administrating them (admin email).

Usually, DNS servers work together in a cluster. Those servers need to synchronize their zone file. For this purpose, they need to perform a zone transfer. The SOA works as a control record with a serial number and indicates the latest update. When the secondary servers (slaves servers) see that the number has changed, they will update and get the new data.

SOA vs RP record

What is a zone transfer?

DNS has a hierarchy structure, where the date is organized by DNS zones. Those DNS zones have DNS zone files that contain the full information for the zone, including a SOA record.

The DNS usually has more than one DNS server. One is the primary DNS server, and the rest are secondary DNS servers.

The primary has the zone file, and all the changes happen inside it. The data from it must be propagated to the rest. This happens through a zone transfer. The zone transfer is a process of updating the zone file in the secondary DNS servers through IXFR zone transfer (partial transfer of changes only) or AXFR zone transfer (full transfer of all DNS records).

Why do you need a SOA record?

You need a SOA record to indicate the authoritative name server and to perform zone transfers. Each zone must have a SOA record, and there should be just one SOA record per zone. Without a SOA record or with multiple per zone, your zone won’t function.

What does a SOA record include?

A SOA record includes the following elements:

  • Name – Zone’s name
  • Type – SOA
  • Primary name server – The hostname of the primary name server for the zone.
  • Admin’s email – A contact information of the administrator of the domain’s zone file.
  • Serial number – The zone’s serial number. The secondary DNS servers will check this value and determine should they update the zone file or not.
  • Refresh rate – This is the time in seconds that the secondary name servers wait until they check again for changes.
  • Retry rate – If the zone transfer between the secondary DNS servers and the primary fails, this is the time the secondary servers will continue trying to update. If the times expires, the secondary servers’ data will be outdated, and they will stop answering queries.
  • Default TTL – A TTL value for all DNS records in the zone file. It indicates how long time the secondary servers should keep the data in the cache memory.

The parameters could have different names, depending on your DNS provider, but the functions will be the same. For example, Primary NS could be written MNAME, the retry rate could be just RETRY, and so on.

SOA record vs NS record

Some novice DNS administrators have trouble distinguishing the purpose of NS records and the SOA records.

The NS records’ purpose is to redirect DNS servers to the following DNS server that has the needed information for the next zone.

The DNS server cluster uses the SOA to update and sync data. Update the secondary DNS servers with data from the primary DNS server.

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CNAME record – everything you need to know

Posted on April 19, 2021 by Josh

Now we will check one of the basic DNS records – CNAME. Why do you need CNAME records, how to use them, and are there any alternatives? You are about to find out! 

What is a CNAME DNS record?

CNAME, the “c” stands for “canonical”, and the rest is “name”. You can use it to show that one domain name is just another way of showing another domain (it is an alias for the canonical domain). The canonical means it is the “true” domain name. 

DNAME record vs CNAME record

See this example, www.ThisIsMySite.com has a redirect to ThisIsMySite.com (without the first part of www.).

A very common approach is to set a CNAME record that determines that a specific subdomain is an alias for the root domain, which is canonical. 

A very important note here, the CNAME records are used exclusively for subdomains! 

If a particular host gets a CNAME, you can’t add any other DNS record for it! 

 And visa-versa, if there are previously added DNS records for the host, you can’t add a CNAME DNS record. 

If you have a situation when you need to have more DNS records and still perform the same function as the CNAME record, you will need another DNS record called ALIAS. 

Use cases of CNAME records

  • Point regular subdomains and subdomain for services like FTP or email to the main host. 
  • CNAME can be used for Content Delivery Networks (CDN) to balance the traffic better. A query for the original server can be pointed to a CNAME that is a part of the CDN and give back a result that will best fit the user. 
  • If an organization has multiple websites, you can use the CNAME records and point them to a single one. 
  • If you have .es, .it, .eu, and more domains registered, you can unite them to a single spot, that is .com. 

How does a CNAME look?

The CNAME record has a very simple look with just a few elements:

  • Host – host’s name. This is the subdomain that you want to point. 
  • Type – CNAME. Just definition of the type of DNS record.
  • Points to – here you set the canonical name. 
  • TTL – Time to live for the record. 

Why do you need a CNAME?

You need a CNAME DNS record to point multiple different hosts to the same point. That way, they will update easily. When you change the DNS records for the canonical name, the rest will get the data from there. 

An example of this is if the IP address of the “true” domain changes, the A or the AAAA record will change in the canonical, but the rest will auto-update and still lead to the proper address.   

CNAME record vs A record

The CNAME will point a host, usually a subdomain, to another host. 

The A record is pointing a host to an IP address. 

CNAME vs ALIAS

The ALIAS record can serve the same purpose as the CNAME but in another way. 

An advantage of the ALIAS is that it can coexist with other DNS records, while CNAME can’t, and you can use ALIAS for the root domain too. This is impossible for the CNAME record. 

The ALIAS is quite faster because it returns an IP address directly, while the CNAME will return an answer that shows the true hostname, and then a second query must be performed to get the IP address.

I hope you get all your doubts about CNAME resolved here. If you want to know more about DNS records, you can find more articles in this blog.

Recommended article: Dynamic DNS (DDNS) – Why use it?

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The best web hosting solution for me – how to choose it?

Posted on February 23, 2021 by Josh

When you have a business and plan to jump online, there are many critical decisions—the website’s design, logistics, strategy for promoting, and of course, choosing the best hosting solution.

There are a large number of hosting providers. You must know the objectives correctly and, therefore, your business’s real needs. The needs of a blog or portfolio site are very different from those of an e-shop. One will require so much more resources to manage more traffic, media files, etc.

Here you have some useful tips for choosing the best web hosting solution.

Choose the best DNS for your business!

Look for the right kind of server

Shared servers usually offer the cheapest rates for hosting. Your website shares resources from the server with hundreds of sites.

Cloud servers are big shared networks of computers, and they are the easiest to scale when your traffic and needs grow, without rebuilding or migrating processes.

Virtual private servers (VPS) work on virtual machines with guaranteed resources. Different websites can run on the same device but with better performance than shared servers. Users need knowledge for managing and maintaining servers.

Dedicated servers are the choice if you don’t want to share with others. It’s located in a data center. It is more expensive, but it has better performance.

Check the uptime 

No host fulfills the promise of 100% uptime. The highest rate some of the best companies offer goes from 99.0% to 99.9%. 

Every website owner, but especially the e-commerce owners, know that downtime can mean a disappointed audience, a significant loss of traffic and money. 

Choose a host with a high uptime rate, 99% and higher but not lower. If you have an e-shop, don’t miss a sale.

Bandwidth is a factor 

It involves the amount of uploaded and downloaded data from a site. It also means how fast users can access your site. The wider bandwidth, the more users can visit your site simultaneously.

Choose a fast host

Users leave websites that take, for loading, more than 3 seconds. There are different ways to optimize sites and make them faster. But if your host (server) is slow, there won’t be a way to overcome the slowness.

Think about the future. Choose a fast host that can offer high speed now and later when your business grows. That includes fast servers with SSD storage, good connectivity, and location.

Look for a secure host

The Security features that web hostings offer you matter. SSL certificates, IP deny services, firewalls, malware surveillance, servers monitoring, frequent website updates, and backups (if your website gets compromised, to restore it fast once the threat is fixed).

Check customer support availability

It’s so much better to get hosted by a company that takes responsibility for possible failures and efficiently fixes them. Check the support channels web hostings offer (chat, phone, email) and schedules (some cover you 24/7, others work just working days and hours).

Research prices aligned to your budget

Most hosting providers offer their services through different plans. Some include initial discount prices. Always check the regular price to know if you can afford it normally. Some go high after that introductory time. Don’t get dazzled with extra or “unlimited” features you won’t need. Check what the plan includes with the base rate. Some charge you extra for basic services like email. Always be sure there’s an option for you to upgrade in case your business grows. 

Conclusion

Choosing the best hosting solution, it’s a critical task. Take a well thought out decision and avoid changes or migration that will cost you extra time and money. Different factors must be considered but take as a starting point of your research hosts that offer good speed, support, and security.

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Benefits of using Managed DNS

Posted on January 11, 2021 by Josh

The DNS is magic, is essential, is the reason why the internet is possible! 

It answers users’ queries of all sorts and finds the real addresses of the sites we love. 

There is no doubt that we need it on a global scale, but do we need it for our websites? Yes! And the easiest way to get it is through a Managed DNS provider. 

What is Managed DNS? 

A Managed DNS service means that a DNS provider has created a system of name servers that you can use to host your DNS records and increase your site or application’s performance and availability. 

You typically get access to a control panel, where you can easily create DNS zones (Primary and Secondary DNS zone), manage DNS records, and add additional locations for redundancy and speed. 

Can’t I have my own DNS? 

Yes, you can create your own DNS server. Or even multiple servers and create a dependency between them, where one is the Primary, and the rest are Secondary. 

The thing is that it will take a lot of time! Setting up FreeBSD or any Linux distro and then configuring DNS server doesn’t happen in a few seconds. 

It is expensive too! Imagine renting servers in several countries. It can go as much as a few thousand per month. 

The benefit will be in full control. You can manage the DNS the way you like. There won’t be any query’s quota per month. 

So should you?

It is mostly not worth the time and effort, especially if you can get a lot better results from a third-party managed DNS provider. 

Benefits of Managed DNS  

  • It is easy to use. Ok, maybe not quite easy, but far more manageable than having to set up your own DNS servers. 
  • It is cheaper. In comparison with having multiple servers in different locations, having a Managed DNS plan is dirty cheap. 
  • You could scale up or scale down your DNS. We live in an on-demand time. We want something, and we want it instantly. We need less, that could be arranged quickly too. You can increase your demand with time or have traffic spikes because of promotions. With a Managed DNS, you can prepare and adapt fast.  
  • Performance is great. You might set up a few DNS servers on your own, but can you use 20, or 30, or even 50? With most Managed DNS providers, you can set multiple points of presence (PoPs).
  • Be available more. As I mention, there are multiple PoPs that you can use. Create your DNS networking to manage the traffic and balance the load. You still could get attacked, and you can have a server or multiple servers down at the same time, but there is a big chance at least one will stand up and answers the queries. 
  • Have good security. There are different security benefits. You can have a Managed DNS that includes DDoS protection. It could negate strong DDoS attacks and keep you up. Also, you can set up different DNS records and authenticate and validate your emails. That way, you won’t have problems sending emails, and you can see if somebody else is trying to send emails from your domain.  

Conclusion

A Managed DNS is definitely worth it! Now the only thing that is left for you is to choose the right one. There are many providers, but what I recommend you is to check in detail their offers. Some big clouds like AWS or MS Azure could get very pricy very fast!

Suggested article: Dynamic DNS (DDNS) – Why use it?

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