PEmicro Cyclone MAX, Руководство пользователя

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Cyclone MAX User Manual 65
CYCLONE MAX
that matter, us progressively more sophisticated devices to transact data.
At the core of these devices is the Router, which functions as a switch
between networks.
The Cyclone performs irrespective of the connection mechanisms, with one
very important caveat: it needs to be set up with the appropriate network
parameters for the underlying network architectures.
8.2 Network Parameters
A typical network becomes operational not after the physical connections
have been established, but after network parameters in the form of IP
(Internet Protocol) numbers have been assigned to the individual computers.
An IP number is unique string that consists of four numbers ranting between 0
and 255, separated by dots, e.g., 192.168.1.2. Every computer that is on a
network needs to have a unique IP number. The computer uses this IP
number to identify itself on the network, and also to address the recipient of its
data.
Assignation of this IP number is sufficient information to transact data on a
simple network connected by a hub. On a more complex network, however,
routing information becomes important. The routing information consist of two
more IP numbers. The first of these is called the Subnet Mask, and is used to
determine whether or not the destination resides on the same subnet (i.e.,
doesn’t need to be forwarded to another network). The other IP number is the
Gateway Address, which is the address of the computer that handles
forwarding and receiving of packets to and from other networks.
Before first use, the Cyclone needs to be programmed with a unique IP
number, the Subnet Mask IP number, and also the default Gateway’s IP
number. This can be done via the USB or the Serial port, and is described in
greater detail in
Section 8.7 - Configuring Via The Cyclone IP
Configuration Utility to configure the Cyclone MAX” section of this manual.
8.3 Internet Protocol
Once the network has been established, and the IP numbers have been
assigned, data can be transacted over a network with one of several
protocols. By far the most prevalent protocol is the Transmission Control
Protocol (TCP), which runs on top of the Internet Protocol in what is
collectively known as the TCP/IP protocol. The TCP/IP protocol was
developed by the Department of Defense to connect different computers from