DNSmásolatból

DNSmásolatból is a Hungarian term that translates to "DNS from copy" or "DNS from backup." It generally refers to a situation where a DNS (Domain Name System) server is operating using a cached or backup copy of DNS records rather than querying the authoritative DNS servers. This can happen for several reasons, often related to network connectivity issues or a deliberate configuration choice.

One common scenario is when a local DNS resolver, such as one on a router or within an operating system, fails to reach its upstream DNS servers. In such cases, it might serve responses from its local cache to maintain connectivity for users. This allows devices on the network to continue resolving domain names even if the primary DNS infrastructure is temporarily unavailable.

Another context for "DNSmásolatból" can be in disaster recovery or high availability setups. Organizations might maintain secondary DNS servers that hold copies of their primary records. If the primary server experiences an outage, the secondary servers can take over, serving the cached or replicated data to ensure continuous DNS resolution. However, operating from a copy can sometimes lead to stale or outdated DNS information if the copies are not updated promptly, potentially causing access issues to websites or services. The term implies a reliance on non-live data for DNS resolution.