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Ping is a utility used to verify Internet
connectivity. It is named after the sonar operation used to locate and
determine the distance to an underwater object.
The
ping
command works by sending multiple IP packets to a specified
destination. Each packet sent is a request for a reply. The output
response for a ping contains the success ratio and round-trip time to
the destination. From this information, it is possible to determine if
there is connectivity to a destination. The
ping
command is used to test the NIC transmit/receive function, the TCP/IP
configuration, and network connectivity. The following examples
describe the types of ping tests that are commonly used in a network:
- ping 127.0.0.1
- This ping is unique and is called an internal loopback test. It
verifies the operation of the TCP/IP stack and NIC transmit/receive
function.
- ping
IP address of host computer
- A ping to a host PC verifies the TCP/IP address configuration for
the local host and connectivity to the host.
- ping default-gateway
IP address - A ping to the
default gateway verifies whether the router that connects the local
network to other networks can be reached.
- ping
remote destination IP address
- A ping to a remote destination verifies connectivity to a remote
host.
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 Lab Activity
Lab Exercise: Using
ping
and
tracert
from a Workstation
In this lab, the
student will learn to use the TCP/IP Packet Internet Grouper (ping)
command and the Trace Route (tracert)
command from a workstation. |
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