Lantronix XPress DR+ manual Addresses and Port Numbers, Hardware Address, IP Address

Chapter 2: Introduction

Figure 2-3. Example of Cascading Multiple XPress DR+ Units

Note: For examples of wireless applications, see Chapter 4: XPress DR+W.

Addresses and Port Numbers

Hardware Address

The hardware address is also referred to as the Ethernet address or MAC address. The first three bytes of the Ethernet address are fixed and read 00-20-4A, identifying the unit as a Lantronix product. The fourth, fifth, and sixth bytes are unique numbers assigned to each unit.

Figure 2-4. Sample Hardware Address

00-20-4A-14-01-18 or 00:20:4A:14:01:18

IP Address

Every device connected to an IP network must have a unique IP address. This address references the specific unit.

Port Numbers

Every TCP connection and every UDP datagram is defined by a destination IP address and a port number. For example, a Telnet application commonly uses port number 23. A port number is similar to an extension on a phone system.

XPress DR+ User Guide 16