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Questions and Answers
6-51
2. Assuming that you decide to perform a weekly full backup and daily
incremental
backups, approximately how much data from the six Web servers can you expect
to find on each incremental backup tape? Explain your answer.
Almost none, because the data used to host Internet sites on Web servers
typically does not
change.
3. Using the information in Table 6-1, which type of magnetic tape drive
would best
be suited for this network, assuming that you want to use only a single tape
for
your daily incremental backups?
a. DLT
b. 8 mm
c. QIC
d. DAT
a
Page
Troubleshooting Lab
6-45
Based on the information provided in the Troubleshooting Lab, answer the
following
questions:
1. What makes you suspect that the DNS server might be the source of the
problem?
The DNS server is related to all the processes that are causing problems. A
DNS server can
contain Active Directory records, provide name resolution services to
internal network clients,
and host the company’s domain on the Internet. If the DNS server is not
available, all three of
these services might be interrupted.
2. Which of the following System Monitor performance counters can you use to
deter-
mine whether the DNS server is the target of a DoS attack? (Choose all
answers that
are correct.)
a. Segments Retransmitted/Sec in the TCPv4 performance object
b. Zone Transfer Failure in the DNS performance object
c. Datagrams Received/Sec in the UDPv4 performance object
d. Total Query Received/Sec in the DNS performance object
e. Messages/Sec in the ICMP performance object
c and d
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