Information Technology Reference
In-Depth Information
Know how to configure zones for dynamic updates. The DNS service allows dynamic
updates to be enabled or disabled on a per-zone basis at each server. This is easily done in
the DNS snap-in.
Know how to delegate zones for DNS. DNS provides the ability to divide the namespace
into one or more zones; these can then be stored, distributed, and replicated to other DNS
servers. When delegating zones within your namespace, be aware that for each new zone
you create, you need delegation records in other zones that point to the authoritative DNS
servers for the new zone.
Understand the tools that are available for monitoring and troubleshooting DNS. You
can use the DNS snap-in to do some basic server testing and monitoring. More important,
you use the snap-in to monitor and set logging options. Windows Server 2012 R2
automatically logs DNS events in the event log under a distinct DNS server heading.
Nslookup offers the ability to perform query testing of DNS servers and to obtain detailed
responses at the command prompt. You can use the command-line tool ipconfig to view
your DNS client settings, to view and reset cached information used locally for resolving
DNS name queries, and to register the resource records for a dynamic update client. Finally,
you can configure the DNS server to create a log file that records queries, notification
messages, dynamic updates, and various other bits of DNS information.
Know how to install and authorize a DHCP server. You install the DHCP service
using the Add/Remove Windows Components Wizard. You authorize the DHCP server
using the DHCP snap-in. When you authorize a server, you're actually adding its IP address
to the Active Directory object that contains a list of the IP addresses of all authorized
DHCP servers.
Know how to create a DHCP scope. You use the New Scope Wizard to create a new scope
for both IPv4 and IPv6. Before you start, you'll need to know the IP address range for the
scope you want to create; which IP addresses, if any, you want to exclude from the address
pool; which IP addresses, if any, you want to reserve; and the values for the DHCP options
you want to set, if any.
Understand how relay agents help with multiple physical network segments. A question
about relay agents on the exam may appear to be a DHCP-related question. Relay agents
assist DHCP message propagation across network or router boundaries where such
messages ordinarily wouldn't pass.
Understand the difference between exclusions and reservations. When you want to
exclude an entire range of IP addresses, you need to add that range as an exclusion. Any
IP addresses within the range for which you want a permanent DHCP lease are known
as reservations. Remember that exclusions are TCP/IP numbers in a pool that do not get
issued and reservations are numbers in a TCP/IP pool that get issued only to the same client
each time.
Search WWH ::




Custom Search