Rockwell Automation 1756-ENET/B ControlLogix Ethernet Communication Interface Module User Manual - Manual (Page 33)

1 Publication 1756-UM051B-EN-P - November 2000
Chapter
3
Before You Configure Your Module
What This Chapter Contains This chapter describes some of the basics you should know about
Ethernet before you configure your Ethernet module. The following
table describes where to find specific information in this chapter.
Ethernet Protocols On the most basic level, Ethernet is a wire or cable that connects
computers and peripheral devices so that they can communicate. The
actual wire used for the network is referred to as the network
“medium.” Beyond the physical medium, all Ethernet networks
support protocols that provide sophisticated data transfer and network
management functionality.
Transmission Control Protocol/Internet Protocol (TCP/IP)
Transmission Control Protocol/Internet Protocol (TCP/IP) is a
transport-layer protocol (TCP) and a network-layer protocol (IP)
commonly used in business environments for communication within
networks and across internetworks. The 1756-ENET/B module uses
TCP/IP for “explicit” messaging, that is, messages in which time is not
a critical factor, such as uploading or downloading programs.
For information about See page
Ethernet Protocols 3-1
Transmission Control Protocol/Internet Protocol (TCP/IP) 3-1
User Datagram Protocol (UDP) 3-2
Simple Network Management Protocol (SNMP) 3-2
Configuration Requirements 3-3
IP Address 3-3
Gateways 3-4
Subnet Mask 3-5
For More Information 3-6