2: Getting Started
Addresses and Port Number
Ethernet (MAC) Address
The Ethernet address is also referred to as the hardware address or the 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 2-1. Sample Ethernet Address
00-20-4A-14-01-18 or 00:20:4A:14:01:18
Internet Protocol (IP) Address
Every device connected to an IP network must have a unique IP address. This
address is used to reference the specific unit.
Port Number
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 PBX system.
The unit’s serial channel (port) can be associated with a specific TCP/UDP port
number. Port number 9999 is reserved for access to the unit's Setup (configuration)
Mode window.
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