You work as a Network Administrator of a TCP/IP network. You are having DNS resolution problem.
Which of the following utilities will you use to diagnose the problem?
A.
TRACERT
B.
PING
C.
IPCONFIG
D.
NSLOOKUP
Explanation:
NSLOOKUP is a tool for diagnosing and troubleshooting Domain Name System (DNS)
problems. It performs its function by sending queries to
the DNS server and obtaining detailed responses at the command prompt. This information can be
useful for diagnosing and resolving name
resolution issues, verifying whether or not the resource records are added or updated correctly in a
zone, and debugging other server-related
problems. This tool is installed along with the TCP/IP protocol through the Control Panel.
Answer option B is incorrect. The ping command-line utility is used to test connectivity with a host
on a TCP/IP-based network. This is achieved
by sending out a series of packets to a specified destination host. On receiving the packets, the
destination host responds with a series of
replies. These replies can be used to determine whether or not the network is working properly.
Answer option C is incorrect. IPCONFIG is a command-line utility used to display current TCP/IP
network configuration values and update or
release the Dynamic Host Configuration Protocol (DHCP) allocated leases. It is also used to display,
register, or flush Domain Name System
(DNS) names.
Answer option A is incorrect. TRACERT is a route-tracing Windows utility that displays the path an IP
packet takes to reach the destination. It
shows the Fully Qualified Domain Name (FQDN) and the IP address of each gateway along the route
to the remote host.