MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

26-10 Chapter 26 Implementing, Managing, and Troubleshooting Network Protocols and Services
Objective 6.1 Answers
1. Correct Answers: C
A. Incorrect: Windows XP Professional always attempts to resolve names using the
HOSTS file and DNS first. NetBIOS name resolution methods such as WINS and
the LMHOSTS file are used only as a last resort.
B. Incorrect: Windows XP Professional checks the HOSTS file for host name resolution
before sending a DNS query. However, the LMHOSTS file is not checked
until after a WINS resolution request is attempted.
C. Correct: Windows XP Professional first checks the specified host name against
the local machine name. It then begins the DNS name resolution process, first
checking the HOSTS file and then sending a DNS query. Finally, the NetBIOS
name resolution process is used, which is as follows: check the NetBIOS name
cache, send a WINS query, send a broadcast query, and scan the LMHOSTS file.
D. Incorrect: A DNS query and the HOSTS file are very similar to a WINS query and
the LMHOSTS file. Windows XP standard DNS name resolution scans the HOSTS
file before sending a DNS query. However, by default, NetBIOS name resolution
scans the LMHOSTS file after sending a WINS query.
2. Correct Answers: A and C
A. Correct: PathPing is a command-line tool for tracing routes through TCP/IP networks.
It combines features of both Ping.exe and Tracert.exe and provides additional
information that neither offers. It is an excellent tool for troubleshooting
routing problems.
B. Incorrect: You use the Arp tool to view, edit, and clear the Address Resolution
Protocol (ARP) cache on the local computer. Arp is used to map IP addresses to
media access control (MAC) addresses of specific network adapters on the same
network segment. It does not provide any information about routing IP traffic to
other network segments and therefore is not an appropriate tool for this scenario.
C. Correct: Tracert is a command-line, route-tracing tool that repeatedly sends Internet
Control Message Protocol (ICMP) Echo Request messages with increasingly
larger time-to-live values to map out the route from the local computer to the one
specified in the command. It is an ideal tool for diagnosing routing problems.
D. Incorrect: Ping is a command-line tool for verifying IP connectivity. The Ping
tool can be used to verify that your computer can communicate with another host
on the network, but it does not provide information about the route taken across
the network and therefore is not an appropriate tool to use in this scenario.
E. Incorrect: Ipconfig is a command-line tool for reviewing the current IP addressing
configuration for the local computer. It is not used for troubleshooting problems
on the network.