What is a characteristic of DNS?
- DNS servers can cache recent queries to reduce DNS query traffic.
- All DNS servers must maintain mappings for the entire DNS structure.
- DNS servers are programmed to drop requests for name translations that are not within their zone.
- DNS relies on a hub-and-spoke topology with centralized servers.
Explanation: DNS uses a hierarchy for decentralized servers to perform name resolution. DNS servers only maintain records for their zone and can cache recent queries so that future queries do not produce excessive DNS traffic.
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