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

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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