OBTAIN AN IP ADDRESS BY USING DHCPBEFORE YOU BEGIN THIS EXERCISE, YOU...
13-33Lesson 3 Overview of Name Resolution
Lesson 3: Overview of Name Resolution
Name resolution is the process of resolving names to IP addresses. It is similar to look-
ing up a name in a telephone book, in which the name is associated with a telephone
number. For example, when you connect to the Microsoft Web site, you use the name
https://traloihay.net. DNS resolves https://traloihay.net to its associated IP address.
The mapping of names to IP addresses is stored in the DNS distributed database.
DNS name servers resolve forward and reverse lookup queries. A forward lookup
query resolves a name to an IP address, and a reverse lookup query resolves an IP
address to a name. A name server can resolve a query only for a zone for which it has
authority. If a name server cannot resolve the query, it passes the query to other name
servers that can resolve it. The name server caches the query results to reduce the DNS
traffic on the network.
After this lesson, you will be able to■ Explain how a forward lookup query works.■ Explain the purpose of name server caching.■ Explain how a reverse lookup query works.Estimated lesson time: 10 minutesHow a Forward Lookup Query Works
The DNS Service uses a client/server model for name resolution. To resolve a forward
lookup query, which resolves a name to an IP address, a client passes a query to a
local name server. The local name server either resolves the query and provides an IP
address or queries another name server for resolution.
Figure 13-10 represents a client querying the name server for an IP address of
https://traloihay.net.
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Figure 13-10 A forward lookup query resolves a name to an IP address.