DNS spoofing
As mentioned before, DNS, or Domain Name Services, maps a name to an IP address. This process is very similar to the process described earlier with reference to DHCP. When the client supplies a DNS name when making a request for a resource, such as in the URL bar in a browser or when Telnetting or SSHing to a host via the command line, the operating system will first look to its local hosts file to see if a mapping is available there. In most cases, this fails to return a result and the operating system next asks the DNS server to provide the mapping. Where this is similar to DHCP is that when a DNS request is initiated, the client will listen for the first response it hears, with the appropriate sequence number used to test the validity ...
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