10.07.2015 Views

Practical Industrial Data Networks:Design, Installation and ...

Practical Industrial Data Networks:Design, Installation and ...

Practical Industrial Data Networks:Design, Installation and ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

266 <strong>Practical</strong> <strong>Industrial</strong> <strong>Data</strong> <strong>Networks</strong>: <strong>Design</strong>, <strong>Installation</strong> <strong>and</strong> TroubleshootingFigure 16.6ICMP message formatsThe three common fields are:• An ICMP message type (4 bits), which is a code that identifies the type ofICMP message.• A code (4 bits) in which interpretation depends on the type of ICMPmessage.• A checksum (16 bits) that is calculated on the entire ICMP datagram.The following table lists the different types of ICMP messages.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!