DNS - Resolver (IP from Name)

Map Of Internet 1973


The resolver is a program that queries a database names in response to client requests to determines:

They must be able to access at least one name server and use that name server's information to answer a query directly, or pursue the query using referrals to other name servers.

A resolver is typically directly accessible to user programs; hence no protocol is necessary between the resolver and the user program.

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Map Of Internet 1973
DNS Alias record

An alias is a DNS record with a name that resolves directly to an ip_address. cnamenamenamean ip addressDNS resolverroundtripip_addressCNAME Before creating an ALIAS record, check there are no: ...
Map Of Internet 1973
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The file /etc/resolv.conf is used by the resolver. Two Domain Name System (DNS) resolver parameters (timeout and attempts) are set by default to low values when the operating system is installed. Typical...
Dns Architecture
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The Domain Name System (DNS) is a database of name. It's naming system (service). It hold naming information for some kind of object (not only but mainly host) DNS can be seen as the phone book of the...
Map Of Internet 1973
Network - Hosts File

A host file is a database name in the form of a file on the local file system. It is a computer file used by the operating system resolver to map an IP name to an IP address. The mapping information...
Map Of Internet 1973
Network - Name and Naming

Every node resource (host, address) on the net has a name. This sections regroups all article this subject. A host has: a unique name defined in the operating system known as the hostname and one...
Map Of Internet 1973
What is a DNS CNAME (Canonical Name) ?

A CNAME (Canonical Name) is the DNS alias functionality that maps a domain name to another name. More ...
Map Of Internet 1973
What is a DNS Forward Lookup?

A forward DNS lookup is a dns lookup that translate a DNS name to an IP. reverse lookup A forward DNS lookup is a query executed by a resolver that will lookup in order: the host file and the DNS...
Map Of Internet 1973
What is a DNS Server (nameserver) ?

A nameserver is a server (host) where a name service (generally DNS) program is running. A name server is organized in namespace information unit called ZONEs that manages DNS information for an apex...

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