Internet Applications INTERNET Notes | EduRev

: Internet Applications INTERNET Notes | EduRev

 Page 1


Internet Applications 
 
 
INTERNET  
APPLICATIONS 
Page 2


Internet Applications 
 
 
INTERNET  
APPLICATIONS 
Internet Applications 
Internet Applications 
Domain Name Service 
Proxy Service 
Mail Service 
Web Service 
 
Page 3


Internet Applications 
 
 
INTERNET  
APPLICATIONS 
Internet Applications 
Internet Applications 
Domain Name Service 
Proxy Service 
Mail Service 
Web Service 
 
DNS 
 
 
DNS 
 
Page 4


Internet Applications 
 
 
INTERNET  
APPLICATIONS 
Internet Applications 
Internet Applications 
Domain Name Service 
Proxy Service 
Mail Service 
Web Service 
 
DNS 
 
 
DNS 
 
Internet Naming Hierarchy 
DNS 
The silent dot at the 
end of all addresses 
.com .net .org .in 
.tcd 
www 
.ac .co 
.iitk 
www 
Page 5


Internet Applications 
 
 
INTERNET  
APPLICATIONS 
Internet Applications 
Internet Applications 
Domain Name Service 
Proxy Service 
Mail Service 
Web Service 
 
DNS 
 
 
DNS 
 
Internet Naming Hierarchy 
DNS 
The silent dot at the 
end of all addresses 
.com .net .org .in 
.tcd 
www 
.ac .co 
.iitk 
www 
DNS Operation 
 
 
DNS Setup 
A DNS server maintains the name to IP address 
mapping of the domain for which it is the name server. 
The DNS server for a domain is registered with the 
domain registrar and the entry is maintained by the 
Internet Root-Servers (13) or Country Level Root-
Servers. 
Whenever a server is queried, if doesn’t have the 
answer, the root servers are contacted. 
The root servers refer to the DNS server for that 
domain (in case the domain is a top level domain) or 
the Country Root Server (in case the domain is 
country level domain). 
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