Chapter 15: Appendix
[5]
The sub net mask on an
This value is identical to the original network address section and the device address section of the class C.
[6] TCP/IP, UDP/IP protocols
TCP, UDP, and IP are major protocols used on Ethernet networks.
The IP is located in the network layer of communication protocols and controls the flow of communication data.
The TCP and UDP are located in the transport layer. Both use the IP as a network layer. However, there is not much difference between these protocols in their details.
The TCP provides reliable service that does not care about the partition of data in the upper layer. On the other hand, the UDP transfers groups of data (data diagram) from the IP to the upper layer without any modification. It pays no attention to whether or not the data arrives nor does it care what the destination is. Confirmation of the data being received and
Although the UDP is not reliable, compared with the TCP, its advantage is that it has a small communication overhead.
The
[7]
In order to offer service from the
| Name | Port number |
1 | Port number for cyclic transfer | 55000 (fixed) |
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2 | Port number for message communication | 55001 (fixed) |
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3 | Port number for a participation request frame | 55002 (fixed) |
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4 | Port number for sending data | 55003 (fixed) |
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