Programming Interview Program to What is DNS Caching? #31 with Explanation

What is DNS Caching? #31

Easy Programming Interview Networking 26 views

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Problem Statement

Explain DNS caching and one common issue it can cause.

Example Solution (Public)

Programming Interview

Resolvers cache DNS responses for a TTL so repeated lookups are faster. A common issue is stale records: you change an IP, but clients still use the old cached value until TTL expires.

Official Solution Code

Resolvers cache DNS responses for a TTL so repeated lookups are faster. A common issue is stale records: you change an IP, but clients still use the old cached value until TTL expires.

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