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Hierarchy of DNS Servers
DNS uses a large number of server organized in hierarchical fashion and distribution around the world. No single DNS server has all of the mappings for all of the hosts in the internet. instead the mappings are distributed across the DNS servers. There are three class of DNS server root DNS servers top level domain servers and authoritative DNS servers organized in a hierarchy as show in figure.
The IP class procedure does not split the 32-bit address space into same size class and the classes do not have the same value of networks. A prefix of n bits gives 2n unique ne
The Common method for writing a program with PVM is as follows: A user writes one or more sequential programs in C, C++, or Fortran 77 having embedded PVM function (or subroutin
what is routing
Mail Access Protocols The e mail message are usually sent to an email server that stores received message in the recipient e mail mailbox. The user retrieves messa
The major features of TCP are following: Reliability : TCP ensures that any data sent by a sender arrives at the destination as it was sent. There cannot be any data loss or mo
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What is the difference between routable and non- routable protocols? Ans) Routable protocols can work with a router and can be used to build huge networks. Non-Routable protocol
Bridges The bridge function is to attach separate homogeneous networks. Bridges map the Ethernet address of the nodes residing on each network segment and allow only essential
Q. Comparing Transport for TCP/IP and osi model? - The features of TCP and UDP defined at TCP/IP Transport Layer correspond to many of the requirements of the OSI Transport Lay
To model a WAN, we need a graph in which the nodes model switches and the edges model direct join between switches. The modeling saves essence of network, and it ignores attached d
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