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Chapter 5: Active Directory Infrastructure > Planning a DNS Namespace - Pg. 105

Planning a DNS Namespace 105 clients, and, if you need to view the IP configuration settings for a given com- puter, you can utilize the DHCP administration tools. Figure 5.4 show a typical network infrastructure for a small AD DS deployment. IP Provisioning DHCP Server DNS Server Domain DC1 Server DC2 Server F I G U r e 5 . 4 A small-scale Active Directory deployment planning a DNS Namespace AD domain names are based on the Domain Name System (DNS). DNS is used on the Internet and has existed since the late 1980s. To implement and under- stand AD, you should have a working knowledge of what functions DNS provides to the network and you should understand the concept of namespace hierarchies. DNS Overview DNS is an essential service in an AD environment. You should understand the basic terminology related to DNS and the process used to resolve hostnames. Here is a basic list of DNS terms you should know: hostname A hostname is an alias or character-based name assigned to a machine that may be mapped to an IP address. Hostnames are used to simplify access to network resources through the use of easier-to-remember names, as opposed to easily forgotten IP addresses. Using hostnames for communications also allows the IP address to be changed and the device to still be located. Fully Qualified Domain Name (FQDN) The FQDN is the combination of the hostname and the DNS domain name. For example, the hostname of computer03 in the domain name of company.local would result in the FQDN of computer03.company.local . Name server The name server is the DNS server that resolves hostnames to IP addresses. Windows Server has the capability to function as a DNS server O In Chapter 6, you will learn how to install and configure the DNS Server role on your Windows Server 2008 R2 installation.