C. ETHERNET TECHNICAL TERMS
APPENDIX
B-62694ENl03
TCP/IP
In the communication by using the Ethernet, TCP/IP
(Transmission Control Protocol/Internet Protocol) is used
usually. “Protocol” means the rule to connect between the
communication devices. TCP/IP is a part of the following
layer.
Layer
Application Layer
Transport Layer
Network Layer
DataLink LapI
_-----__ _
MAC Layer
Physical Layer
Protocols, Network Services
User Services as “FTP”
Protocols as “TCP”, “UDP”
Protocols as “IP”, “ICMP”
Protocols as “ARP”, “RARP”
Hardware as cables, devices
Usually, “TCP/IP” protocol is a generic name including the
protocols in Transport Layer and Network Layer.
IP ADDRESS (INET ADDRESS)
In TCP/IP, the address called “IP ADDRESS” is used in order
to identify the communication devices in a network. So, in
order to communicate by using TCP/IP, each device in a
network must have a unique IP address.
Usually IP address is shown as a form separating 4 octets
into each 1 octet by using “.” (period). Each octet can have a
value from 0 to 255.
IP address consists of the Network address part showing the
network group and the Host address part showing the node.
IP address can be classified into 3 classes.
(The underline part is the each address part)
If your network has less than 255 nodes, CLASS C is used
usually.
The IP address of the device connected in a network has a
common Network address part and a unique Host address
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