XP0

Phase 1 · Protocol

DNS Lookup

Walk through recursive DNS resolution, cache hits, TTL, and common record types.

Trace how a recursive resolver finds DNS records. Learn mode is stable; Live mode asks a real DNS resolver.

Mode
Record type
Resolver cache
Try
Answer section

A packet.school

.school
A203.0.113.24TTL 5m
Resolution trace
  1. 01

    Client asks the recursive resolver.

  2. 02

    Resolver checks cache and misses.

  3. 03

    Root server points the resolver to the TLD servers.

  4. 04

    TLD server returns the authoritative name servers.

  5. 05

    Authoritative server returns the requested record set.

  6. 06

    Resolver stores the answer until TTL expires.

  7. 07

    Client receives the DNS answer.

Authority
Registry
ps-registry
Authoritative NS
ns1.packet.school · ns2.packet.school