OBTAIN AN IP ADDRESS BY USING DHCPBEFORE YOU BEGIN THIS EXERCISE, YOU...

13-41Lesson 4 Configuring a DNS Client

The Append Parent Suffixes Of The Primary DNS Suffix check box is also selected by

default. If it is selected, the DNS resolver strips off the leftmost portion of the primary

DNS suffix and attempts the resulting domain name. If this fails, it continues stripping off

the leftmost label and attempting the resulting domain name until only two labels remain.

For example, assume again that an organization uses the domain name north.con-

toso.com, and that the Append Primary And Connection Specific DNS Suffixes option

is enabled. Normally, the suffix north.contoso.com would be added to unqualified

queries, so that a user typing in client1 would have the query appended to

client1.north.contoso.com. If you enable the Append Parent Suffixes Of The Primary

DNS Suffix option, DNS first uses the suffix north.contoso.com in the normal way. If

that did not resolve, DNS would use the parent suffix contoso.com, and finally the par-

ent suffix of that: .com. So when the user types client1, DNS would first try

client1.north.contoso.com, then client1.contoso.com, and finally client1.com.

Append These DNS Suffixes (In Order) Option

By default, the Append Primary And Connection Specific DNS Suffixes option is

selected, so the Append These DNS Suffixes (In Order) option is not selected; only one

of these two options can be selected at one time. This option allows you to specify a

list of domains to try. The DNS resolver adds each one of these suffixes one at a time

and in the order you specified. Queries for unqualified names that are used on this

computer are limited to the domains that you listed in Append These DNS Suffixes (In

Order). Continuing the example from the previous section, you could specify that DNS

suffixes be appended in the order .com, then contoso.com, and then north.con-

toso.com.

Register This Connection’s Addresses In DNS Option

Selecting the Register This Connection’s Addresses In DNS check box causes the com-

puter to attempt to dynamically register the IP addresses (through DNS) of this computer

with its full computer name. To view the computer name for this computer, click Start,

click My Computer, click View System Information, and click the Computer Name tab.

Use This Connection’s DNS Suffix In DNS Registration Option

Selecting the Use This Connection’s DNS Suffix In DNS Registration check box causes

the computer to use DNS dynamic updates to register the IP addresses and the connec-

tion-specific domain name of the connection. The connection-specific name of this

DNS connection is the computer name, which is the first label of the full computer

name specified in the Computer Name tab located in View System Information, and the

DNS suffix of this connection. If the Register This Connection’s Addresses In DNS

check box is selected, this registration is in addition to the DNS registration of the full

computer name.

Practice: Configuring a DNS Client

After completing this practice, you will be able to configure computers running Win-

dows XP Professional as DNS clients.