Lantronix XPress-DR XPress-DR / XPress-DR-IAP - User Guide - Page 110

IP Addresses, 4.1 Network Portion, 4.2 Subnet Portion

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UDP 8.4 IP Addresses Each TCP/IP node on a network host has a unique IP address. This address provides the information needed to forward packets on the local network and across multiple networks if necessary. IP addresses are specified as x.x.x.x, where each x is a number from 1 to 254; for example, 192.0.1.99. The Device Server must be assigned a unique IP address to use TCP/IP network functionality. IP addresses contain three pieces of information: the network, the subnet, and the host. 8.4.1 Network Portion The network portion of the IP address is determined by the network type: Class A, B, or C. Table 35 - Network Portion of IP Address Network Class Class A Class B Class C Network Portion of Address First byte (2nd, 3rd, and 4th bytes are the host) First 2 bytes (3rd and 4th bytes are the host) First 3 bytes (4th byte is the host) In most network examples, the host portion of the address is set to zero. Table 36 - Available IP Addresses Clas s A B C D, E Reserved Available 0.0.0.0 127.0.0.0 128.0.0.0 191.255.0.0 192.0.0.0 223.255.255.0 224.0.0.0 to 255.255.255.254 255.255.255.255 1.0.0.0 to 126.0.0.0 128.1.0.0 to 191.254.0.0 192.0.1.0 to 223.255.254.0 None Consider the IP address 36.1.3.4. This address is a Class A address; therefore, the network portion of the address is 36.0.0.0 and the host portion is 1.3.4. 8.4.2 Subnet Portion The subnet portion of the IP address represents which sub-network the address is from. Subnetworks are formed when an IP network is broken down into smaller networks using a subnet mask. 8-14 DSTni-XPress DR User Guide

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UDP
8.4 IP Addresses
Each TCP/IP node on a network host has a unique IP address. This address provides the
information needed to forward packets on the local network and across multiple networks if
necessary.
IP addresses are specified as
x.x.x.x
, where each x is a number from 1 to 254; for example,
192.0.1.99. The Device Server must be assigned a unique IP address to use TCP/IP network
functionality.
IP addresses contain three pieces of information: the network, the subnet, and the host.
8.4.1 Network Portion
The network portion of the IP address is determined by the network type: Class A, B, or C.
Table 35 - Network Portion of IP Address
Network Class
Network Portion of Address
Class A
First byte (2nd, 3rd, and 4th bytes are the host)
Class B
First 2 bytes (3rd and 4th bytes are the host)
Class C
First 3 bytes (4th byte is the host)
In most network examples, the host portion of the address is set to zero.
Table 36 - Available IP Addresses
Clas
s
Reserved
Available
127.0.0.0
191.255.0.
223.255.255.0
223.255.254.
224.0.0.0 to 255.2
A
0.0.0.0
1.0.0.0 to 126.0.0.0
B
128.0.0.0
0
128.1.0.0 to 191.254.0.0
C
192.0.0.0
192.0.1.0 to
0
D, E
55.255.254
None
255.255.255.255
Consider the IP address 36.1.3.4. This address is a Class A address; therefore, the network
portion of the address is 36.0.0.0 and the host portion is 1.3.4.
rmed when an IP network is broken down into smaller networks using a
subnet mask
.
8.4.2 Subnet Portion
The subnet portion of the IP address represents which
sub-network
the address is from. Sub-
networks are fo
8-14
DSTni-XPress DR User Guide