Technical data

TCP/IP Network Basics 7
Agilent Connectivity Guide 169
Internet Control Message Protocol (ICMP) Internet Control
Message Protocol (ICMP) is primarily used to send error messages,
perform diagnostics, and control data flow. You can also use ICMP with
the Packet InterNet Groper (
Ping) utility. To ping another host from a
Command Prompt, type
ping <ip_address>.
Example: Using ping for Echo Request
For example, you could use the Ping utility to send ICMP echo request
packets to the destination host and request the destination host return
these packets. If the packets are returned, you can assume the
connection is good. If the packets are not returned, a connectivity
problem exists. This figure shows an example return from pinging a
computer at IP address 156.140.72.1.
The Transport Layer
The Transport Layer of the TCP/IP model contains the protocols
responsible for addressing and routing of packets. The Transport Layer
determines if the sender and receiver will establish a connection before
communicating and how often acknowledgements of the connection are
sent. The protocols at the Transport Layer deliver data to and receive
Figure 58 Example Using Ping Utility