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Root DNS Servers
A root server is a serve which consists of the entire hierarchy of servers. A root server usually does not store any information about domains but delegates its authority to other servers keeping references to those servers.
There are several root servers each covering the whole domain name space. The servers are distributed al around the world. In the internet there are 13root DNS server ( Labeled a through M.
Describe Network Topology and VPN Network Topology refers to the layout of a computer network. It presents how devices and cables are physically laid out, as well as how they j
Post Office Protocols Version In computing the post office protocol version 3 (POP3) is an application layer internet standard protocols used by local e mail clients
When an error is discovered the receiver is able to ask the sender to retransmit the entire data unit Error Correction-Forward Error Correction A receiver is able to u
Simulate extremely limited forms of IP and ICMP. You will simulate 6 computers, 4 hosts and 2 routers, that are connected in an imaginary network with the topology as shown belo
Simple Mail Transfer Protocoland Secure Sockets Layer SMTP: Simple Mail Transfer Protocol is a server-to-server protocol for delivering electronic mail. SSL: Secure Sockets
Question: (a) With the help of a diagram, describe a typical DNS system. (b) Using signal sequence or state transition diagrams, illustrate the following scenarios: i.
(i) Suppose that frames are 1250 bytes long including 25 bytes of overhead. Also assume that ACK frames are 25 bytes long. a) Calculate the efficiency of stop-and-wait ARQ in
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Hybrid Networks Allows an organization to have its own private networks and at the same time access to the global internet. the organization may share its information w
Link State Packet When a router floods the network with information about its neighbourhood. It is said to be advertising. The basis of this advertising is a short pack
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