Trouble Detection No client directly uses DNS. In some ways, DNS is the precurso

Question

Trouble Detection

No client directly uses DNS. In some ways, DNS is the precursor of contemporary directory services. From the very beginning, it was not practical to use IP addresses directly; address assignments change after time. Hosts files, which are tables with name to number matching, grew too large to manage as the size of the Internet increased. This caused DNS to gain in popularity. One of the advantages of DNS is its ability to scale, because it can distribute and interconnect lists of names and addresses.

Though it has been of great value to the ease of use of the Internet, configuration errors of clients, servers, and resolvers can occur in many ways. In addition, new ways are being discovered all the time to warp, corrupt, or disable the function of the server, resolver, or client. These range from co-opting delegation for a given domain at the top of the hierarchy to poisoning a local resolver with inaccurate addresses. Most users will not suspect a compromised lookup that takes them to a site that looks legitimate, and many will, when experiencing a timeout or failure of a host lookup, simply conclude that "the Internet is down."

In 3

Explanation / Answer

1. TCP/IP Configuration Points to Public DNS Servers
This is by far the most common DNS error. Each network interface has a set of TCP/IP settings that lists the DNS servers used by that interface.

If the TCP/IP settings for a member computer specify the IP address of a public DNS server

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