Naming, Trading, Directory and Discovery Services (CDK â chap.9)

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Types of DNS RecordsRecord type Meaning Main contentsA A computer address IP numberNAn authoritative name server Domain name for serverS CNAME The canonical name for an alias Domain name for aliasSO Marks the start of data for a zone Parameters governing the zoneA WKS A well-known service description List of service names and protocolsPTR Domain name pointer (reverse Domain namelookups)HINFO Host information Machine architecture and operatingsystemMX Mail exchange List of < preference, host > pairsTXT Text string Arbitrary textDNS APIThere exist a number of routines which will allow DNS searching andmapping of:• network names to network address numbersgethostname( ), gethostbyname( ), gethostbyaddress( )• protocol names to protocol numbersgetprotobyname( ), getprotobynumber( ),• service names to port numbersgetservbyname( ), getservbyport( ),Ian Johnson 64 Distributed Systems
Organisation of name services(assuming Sun Solaris)gethostbyname( )call on SunSolaris is able toleverage a wholenumber ofdirectory andname services ina seamlessmanner.NIShosts.bynamegethostbyname( ){ alsogetservbyname( )getprotobyname( )NSSWITCHhosts: files nisplus dnsNIS+hosts.org_dirFILES/etc/hostsNSCDhostsDNS“A”recordsNSCD = Name Server Caching Daemon – caches all below plus LDAPIan Johnson 65 Distributed Systems
Page 1 and 2: Naming, Trading, Directory andDisco
Page 3 and 4: Naming Services• Name AssignmentP
Page 5 and 6: DNS Name space partitioningDNS Name
Page 7 and 8: Iterative Name LookupNS2Clien213NSN
Page 9: Recursive Name ResolutionServer for
Page 13 and 14: Directory ServicesAttribute lookup,
Page 15 and 16: Naming & Directory ServicesSummaryC
Page 17 and 18: CharacteristicsCommon language betw
Page 19 and 20: Consider a Video on DemandService."
Page 21 and 22: Service DiscoveryService discovery
Page 23 and 24: ¡¡¡¡¡¡¡¡¡¡Service Discove
Page 25 and 26: 1 Discovery: SSDP SidebarWhat is SS

Naming, Trading, Directory and Discovery Services (CDK â chap.9)

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Naming, Trading, Directory and Discovery Services (CDK â chap.9)