Archives for DNS category
SPF record is a Sender Policy Framework resource record. This is defined as a regular TXT record type.
The SPF record are used to avoid spam emails. SPF record validates the mail server that delivers the email for a domain to check if it is actually an authorised server before accepting any email from it.
SRV records, also known as Service records in DNS helps clients find services in the domain. A best example of this is with the Windows Active Directory where the SRV records are used to locate the Domain Controllers.
The following RFCs define the best practices for DNS Setup.
RFC 1912 – Common DNS Operational and Configuration Errors
RFC 2182 – Selection and Operation of Secondary DNS Servers
RFC 2219 – Use of DNS Aliases for Network Services Read more… »
Internet Explorer does a DNS Caching which is different from that of the DNS caching on the system through the DNS Client or Resolvers. Read more… »
DNS Caching is a process by which a DNS client also called a DNS Resolver holds the learnt information about a host or a Domain when it had earlier queried a DNS Server. While this serves good in getting DNS responses for repeated queries faster, it can also be a limiting factor at times. Read more… »
DNS Clients in Windows has the ability to cache DNS Queries as does most of the clients on other operating systems. This helps the DNS clients to resolve recently accessed web pages faster by resolving the IP Address directly from its cache rather than querying a DNS server. Read more… »
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