Technical data

Chapter 3: Programming and Calibration
General Networking Considerations
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Clients: Computers and devices that use these resources are called clients.
Networking features supported in the JAGXTREME terminal:
• Clustering
• Embedded Web Server
• FTP Server
• SMTP Client
• TCP/IP
• Ethernet
• PPP/Modem
• JagBASIC Client and Server Application Interface
General Networking
Considerations
IP addresses
IP addresses are 32-bit numbers that are often broken down for easier reading into
octets. An octet is a 3-digit number between 0 and 255. An IP address contains 4
octets. The network identifier is typically defined in the first 3 octets. The last octet is
usually an identifier of the individual node.
A unique IP address is required for each individual node on the network. For example,
when a JAGXTREME terminal uses both PPP and TCP/IP protocols, the IP addresses
must be unique for both. These IP addresses must also be unique to the other nodes
such as computers, other JAGXTREME terminals or other devices.
An end user must
configure TCP/IP with the following information:
• The IP address.
• The Subnet Mask. This defines how much of the IP address is used for identifying the
local network and how much of the IP address is used to identify the node on that
network.
Example: A JAGXTREME terminal has the following IP address: 130.132.59.234. If the
first three bytes or octets designate the Local Area Network (LAN) address, then the
Subnet Mask must be defined as 255.255.255.0 (255 is the largest byte value and
represents the number with all bits turned on).
JAGXTREME terminal’s IP address
: 130.132.59.234
Subnet mask
for the JAGXTREME and all other members of its LAN on: 255.255.255.0
The Computer’s IP address:
130.132.59.233
The subnet denotes that any other machine with an IP address beginning 130.132.59.*
is on the same LAN, so messages are sent to it directly. Any IP address beginning with a
different value can only be accessed indirectly by sending the message through a
gateway or router (which ties the JAGXTREME terminal’s LAN to other LAN’s).
WARNING: If your JAGXTREME
terminal(s) is/are connected to a
local area network (LAN) having
other devices already connected,
do not choose IP addresses
w
ithout consulting with the owner
of the LAN. Serious network
service problems can occur if you
inadvertently choose an IP
address that is already in use.