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5 posts in this tag

DNS over TCP

DNS

We recently ran into a problem where a DNS query was failing because the response was too large. The maximum size of a DNS response that can be sent over UDP (User Datagram Protocol) is 512 bytes. This is because the...

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Types of DNS records

DNS

There are several types of DNS (Domain Name System) records, each serving a different purpose. Here are some of the most common types: A (Address) Record: This record maps a domain name to an IPv4 address. AAAA (IPv6...

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CIDR Notation

IP Addressing

CIDR (Classless Inter-Domain Routing) notation is a compact representation of an IP address and subnet mask. It is used to express the number of bits that make up the network portion of the IP address. CIDR notation is...

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What is RWHOIS?

IP Addressing

rwhois (also known as Referral Whois) is a protocol used to obtain registration information about IP addresses and other Internet resources. It is a distributed database system that allows network administrators to...

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