In addition to authoritative DNS servers, which are the main carriers of information about domains, there is another type of DNS servers – so-called caching servers. Any client that needs to work with domain names would normally always have to send record queries to a number of DNS servers for each part of the domain […]..
Category : Domains and DNS
The motivation for the creation of domain names and the DNS system stems from the different ways of identifying devices in a computer network. Computers identify each other with numerical designations, which is the easiest and most natural way for them, and using name designations would be too complicated and slow for them. On the […]..
The hierarchical system of domains on the Internet solves the main problems – it enables the systematic assignment of names and the delegation of the administration of the entire system. Each node of the domain name hierarchy is managed by a specific entity (organizations, associations, etc., in lower levels these are already specific legal and […]..
When connecting to a server using the SSH protocol, authentication occurs between the client and the server by giving the client a fingerprint of the server’s public key when the connection is initiated so that the client can verify the identity of the server. The trustworthiness and security of the connection thus depends on whether […]..
A set of authoritative DNS servers for a particular domain is often divided into one primary and one or more secondary ones. The primary server is the main carrier of information, so it is the place where the main data store is and where the administrator makes DNS modifications. As soon as changes are made […]..
Explanation of zone transfer AXFR, therefore transfer content for domain zone from one server to another…
Detailed explanation of the DNSBL (DNS-based Blackhole List), therefore the method of recording of potentially dangerous or malicious IP addresses in DNS especially against spam…
Detailed explanation of the method of protection against spam by using SPF (Sender Policy Framework)…