Waters Network Systems
User’s Manual
Page 16
GSM-2108/GSM-1008SFP
4.4
IP Address Assignment
Figure. 4-3 - Login Screen via a Web browser
For IP address configuration, the following three parameters are required:
IP
address
Subnet
Mask
Default Gateway and DNS.
IP Address:
The address of the network device is used for internetworking communication. IP addresses are
split into predefined address classes or categories. This is referred to as “classful” addressing
because the address is spilt into three predefined classes, groupings or categories. Each IP
address comprises two parts: network identifier (address) and host identifier (address). The
network identifier identifies the network on which the host resides, while the host identifier
identifies the particular host on the given network. The host identifier must be unique in the
same LAN. Each class has its own network range between the network identifier and host
identifier in the 32 bits address. IP address is known as IPv4.
Network identifier
Host identifier
With “classful” addressing, the IP address is divided into three classes: class A, class B and
class C. The rest of IP addresses are for multicast and broadcast. The bit length of the network
prefix is the same as that of the subnet mask and is denoted as IP address/X, for example,
192.168.1.0/24. Each class has its address range described below.
Class A:
Address is less than 126.255.255.255. There are a total of 126 networks can be defined
because the address 0.0.0.0 is reserved for default route and 127.0.0.0/8 is reserved for
loopback function.
32 bits
