You work as a Network Administrator for Tech Perfect Inc. The company has a Windows 2008 Active
Directory-based network. All client computers on the network run Windows Vista Ultimate. You
have configured a Dynamic DNS (DDNS) on the network. There are a lot of mobile users who often
connect to and disconnect from the network. Users on the network complain of slow network
responses. You suspect that the stale records on the DNS server may be the cause of the issue. You
want to remove the stale records. Which of the following technologies will you use to accomplish
the task?
A.
RODC
B.
Aging
C.
Scavenging
D.
Forwarding
Explanation:
In DNS, with dynamic updates enabled, resource records (RRs) are automatically added to zones
when computers start on the network or connect to the network. In some cases, these records are
not automatically removed when computers leave the network. These stale records fill up the DNS
zone and adversely affect the performance of the DNS server. Scavenging is the process of removing
these stale records from the DNS zone.Answer B is incorrect. Aging is a process in which resource records (RRs) in a DNS zone get aged
according to their time stamp and DNS settings. These aged (stale) records get deleted during the
scavenging of the DNS zone. Manually added records on the DNS zone do not get aged by default.Answer A is incorrect. Read-only Domain Controller (RODC) is a domain controller that hosts the
read-only partition of the Active Directory database. RODC was developed by Microsoft typically to
be deployed in a branch office environment. RODC is a good option to enhance security by placing it
in a location where physical security is poor. RODC can also be placed at locations having relatively
few users and a poor network bandwidth to the main site. As only the read-only partition of the
Active Directory database is hosted by RODC, a little local IT knowledge is required to maintain it.Answer D is incorrect. Forwarding is a technique in which DNS servers on the network are
configured to send DNS queries to a particular DNS server.