Tag: DDoS attack

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.


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.

How can a DNS outage affect your company?