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DNS - Coggle Diagram
DNS
DISTRIBUTED
no failure point
database
dig trace +
RECORD
TTL (before asking for ip again)
before changing IP reduce TTL
protocol
same query and reply
flag
id
for forwarding
Hierarchical
3 level
root
.com location
multiple servers
tld
google
second level (authorative)
connection
Local
cache results (like proxy)
optimization
iterated query
makes all requests
recursive query
local ->root->tld->authorative->tld->root->local
net tools
RRT ->