Author: Quentin

Get familiar with DNS cacheGet familiar with DNS cache

Explanation and definition of DNS cache

A DNS cache is a temporary cache memory used by DNS resolvers and other devices to store data. The DNS records that were initially applied to the domain names that were searched are kept in memory. These records contain information such as domain names’ IP addresses (IPv4 or IPv6), details about their email servers, services, authentication, verification information, and more. The DNS cache will save all of the data. However, as previously said, it will only last briefly because each DNS record has a TTL (Time to Live) value.

It is significant to notice that the DNS cache will momentarily contain all of the records for the different domain names. This is because the administrator sets the TTL (Time to Live) value, which determines how long it will last.

Users’ DNS queries can get faster responses thanks to this method, which also aids in effective resource optimization.

(more…)

DNS downtime (DNS outage) – What is it and how to avoid itDNS downtime (DNS outage) – What is it and how to avoid it

DNS downtime: Meaning

A DNS outage, also known as DNS downtime, is when the DNS is not functioning correctly. This implies that the IP address won’t be visible if you look for the domain name. Users will instead utilize DNS requests to find your domain. The domain’s authoritative nameserver will be requested by the DNS recursive server, but it will not respond and instead receive an error message.

(more…)

DNS propagation: What is it, and how to check it?DNS propagation: What is it, and how to check it?

Do you know what is exciting? Waiting hours and even days at a time, pressing refresh!

Said no one ever. Waiting is a daunting task nobody likes, but sometimes, there is nothing that you can do. When it comes to DNS, DNS propagation is the time to refresh, and it depends on an important factor. Would you like to know which?

Why the DNS propagation takes so long?

(more…)

Guide: How to use the Nslookup command?Guide: How to use the Nslookup command?

Nslookup command explained

The Nslookup command is a helpful and very useful tool with a command-line interface (CLI). The abbreviation “nslookup” is short for “name server look up”. Typically, it is utilized for finding the IP address of a particular host or performing a Reverse DNS Lookup which is a process of finding a domain name that is associated with an IP address (IPv4 or IPv6). In most cases, it is pre-built on almost every operating system (OS). That is why it is a very popular choice for administrators.

(more…)

5 DNS record types you should implement5 DNS record types you should implement

From what we know,  there are a lot of DNS record types. They are a critical component of the Domain Name System process. In this article, we will define them and discuss which types of records are most important.

DNS record – what is it?

DNS records are text instructions kept in zone files that allow domain names to be resolved to IP addresses (A record and AAAA record). They are very light and simple to edit (if necessary) and depend on the type of query. In view of the fact that computers are not human, they use records to understand and read texts. That is, they convert the written file into numbers that machines can interpret.

(more…)