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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.
Process communicating End systems communicate with each other by the processes. A process can be thought of a s program that is running within end systems. Process
Can you describe screened host architecture?
Firewalls Firewalls emerged as a new technology in 1990s but its idea was present near two decades back. Historical context of "Firewall" is quite literal. It was in use to des
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What are TP-Lite and TP-Heavy Monitors? Ans) TP-Lite is simply the integration of TP Monitor functions in the database engines.TP-Heavy are TP Monitors which handles the Client/
Q. Illustrate the Drawbacks of stop and wait? Drawbacks of stop and wait - Only one frame is able to be in transit at a time - After every frame sent the host must wai
a) Used for sending e-mail. b) Uses port 25.
Q. Explain about Congestion control? Congestion control Open-loop congestion control - prevent congestion before it happens retransmission policy - Ret
Data Sharing One of the most important uses of networking is to allow the sharing of data. Before networking was common an accounting employee who wanted to prepare a report f
Network Problems Q1 Consider the single-sender CDMA example in Kurose & Ross. What would be the sender's output (for the 2 data bits shown), if the sender's CDMA code were (
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