Connected: An Internet Encyclopedia
2.3.4. Size limits

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2.3.4. Size limits

2.3.4. Size limits

Various objects and parameters in the DNS have size limits. They are listed below. Some could be easily changed, others are more fundamental.

labels 63 octets or less
names 255 octets or less
TTL positive values of a signed 32 bit number.
UDP messages 512 octets or less


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Connected: An Internet Encyclopedia
2.3.4. Size limits