Lantronix XPort User Manual download pdf (Page 10)

2: Introduction

XPort™ User Guide 10

Protocol Support

The XPort device server uses the Internet Protocol (IP) for network communications.

It uses the Transmission Control Protocol (TCP) to assure that no data is lost or

duplicated, and that everything sent to the connection arrives correctly at the target.

Other supported protocols include:

 ARP, UDP, TCP, ICMP, Telnet, TFTP, AutoIP, DHCP, HTTP, and SNMP for

network communications and management.

 TCP, UDP, and Telnet for connections to the serial port.

 TFTP for firmware and web page updates.

 IP for addressing, routing, and data block handling over the network.

 User Datagram Protocol (UDP) for typical datagram applications in which

devices interact with other devices without maintaining a point-to-point

connection.

 SMTP for e-mail transmission.

Addresses and Port Numbers

Hardware Address

The hardware address is also referred to as the Ethernet 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.

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

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 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.

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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Lantronix XPort User Manual Page 10