DNS type/synchronization type/domain and region differences
SOA internal Data characteristics
Implementation of DNS load balancing (load balance)
Caching DNS servers
Cache definition, action, multilevel caching
A full parse request
Resolve the answer
DNS distributed features
Zone Resolution Library/rr/rr_type
A record of round robin, multi-host name to the same host, the pan domain name resolution
<< repeatedly, the results of multiple tradeoffs >>
Differences in DNS type, synchronization type, zone, and domain
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SOA internal Data characteristics
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Implementation of DNS load balancing (load balance)
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Caching DNS servers
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Cache definition, action, multilevel caching
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A full parse request
Local host initiates recursion, carrier caches DNS iterations
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Local host initiates recursion, local cache DNS iterations
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Resolve the answer
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DNS distributed features
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Zone Resolution Library: Made up of a number of RRs
RR: resource record type Resource Record details the relationship of all host names and IP
Rr_type:
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RR format:
Name [TTL] in Rr_type Vlaue
1)TTL: The length of the cache for the parsed result, in units of "s" Seconds
2)@ at can refer to the region name
3) adjacent multiple resource records, name in the same time, you can omit the name
4) each NS,MX record corresponds to a record
SOA, NS, MX, A, PTR, CNAME
SOA Records
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For example: @ 86400 in SOA @ linux.magedu.com. (20170916; serial 10M; refresh 5M; retry 1W; expire 1D ; TTL)
NS Records
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MX record
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A record
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PTR record
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CNAME record
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This article is from the "Reading" blog, make sure to keep this source http://sonlich.blog.51cto.com/12825953/1965799
The DNS request process and resource record definition for---------Linux