Tag: IPv4

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.

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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.

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