Help for infrastructure

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hello guys

i'm studying for proof infrastructure and two questions that complicated understand.

1 - if tcp / ip is protocol for data communication, because once used up the netbios and dns now .. ? tcp / ip by itself does not it?

2 - secondary zone, between subsidiary and a parent company in a subsidiary has a secondary zone, if the link goes down, name resolution will not stop the same way?
why say the secondary zone maintains a cache of resolved names then?
now i understood that regardless, always will have to use the physical link to resolve name in array, without the communication link will not have, then why did not the advantage of the secondary zone.

if can help, thank you

hello guys

i'm studyingforproofinfrastructureand twoquestionsthatcomplicated understand.

1 -if tcp/ipis protocol fordata communication,becauseonceusedupthenetbiosanddnsnow..?tcp/ipby itselfdoesnotit?

ans: tcp/ip protocol suite consists sub protocols in it. dns & netbios sub protocols among protocol suite.

each protocol have own port number , protocols using when required/configured. 

port numbers dns & netbios protocol is

53 tcp/udp domain name system (dns)
137 tcp/udp netbios netbios name service 138 tcp/udp netbios netbios datagram service
139 tcp/udp netbios netbios session service

to know more tcp/ip refer link: http://www.tcpipguide.com/free/t_tcpipinternetarchitectureandprotocolsuite.htm

2 -secondaryzone,between subsidiaryand aparent company ina subsidiary has asecondaryzone,if thelink goes down,name resolutionwillnotstopthe same way?
whysay thesecondaryzone maintains acacheof resolved namesthen?
nowi understood thatregardless,alwayswill have touse thephysicallinkto resolve namein array,without thecommunicationlinkwill not have,thenwhydidnottheadvantageof thesecondaryzone.

ans: secondary zones hold read-only copy of dns database stored file in server's root folder.

moreover not writable.i suggest refer ace fekay's answer for better understanding of secondary zone.

please see above answers , marked them bold for reading purpose.

thank you.



Windows Server  >  Network Infrastructure Servers



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