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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.
Hyper Cube: A Hypercube interconnection network is an expansion of cube network. For n=3, Hypercube interconnection network may be described recursively in this manner: For n
What are the responsibilities of Application Layer? The Application Layer enables the user, whether human or software, to access the network. It gives user interfaces and suppo
Q. Show the Error control in TCP? Error control in TCP Detect lost segments, out-of-order segments, corrupted segments and duplicated segments Three tools: chec
What is DoS? A do, or Denial-of-Service attack, is an attempt to stop users from being able to access the internet or any other network services. Such attacks might be come in
What are the drawbacks of ARCNet? Here are some drawbacks of ARCNet: 1. Standard ARCNet is very slow (2.5 Mb/s). It is almost seven times slower than Token Ring. 2. ARC
Different layers of OSI Model ?
Gateway A gateway is an internetwork device which joins different network protocols together. It woods on all seven layers of OSI model. Gateways are also known as pro
Private Networks The information routes from one networks to another network through a leased line. If an organization needs privacy can use a private networks or networ
Explain Asynchronous FDDI Asynchronous bandwidth is allocated utilizing an eight-level priority scheme. Every station is assigned an asynchronous priority level. FDDI as wel
Name the Twisted pairs cables Twisted pairs cables (Shielded and Unshielded), Coaxial cable and Fiber optic cable. ?Testing of the points ?Testing of the entire network t
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