Specifications

Waters Network Systems User’s Manual Page 19
GSM-2108/GSM-1008SFP
Prefix Length No. of IP matched No. of Addressable IP
/32 1 -
/31 2 -
/30 4 2
/29 8 6
/28 16 14
/27 32 30
/26 64 62
/25 128 126
/24 256 254
/23 512 510
/22 1024 1022
/21 2048 2046
/20 4096 4094
/19 8192 8190
/18 16384 16382
/17 32768 32766
/16 65536 65534
Table 4-2
According to the scheme above, a subnet mask 255.255.255.0 will partition a network with the
class C. This means there will be a maximum of 254 effective nodes existing in this sub-netted
network and is considered a physical network in an autonomous network. It owns a network IP
address which may look like 168.1.2.0.
With the subnet mask, a bigger network can be divided into smaller pieces. If you want to have
more than two independent networks in a LAN, the network must be partitioned. The subnet
mask must be applied.
For different network applications, the subnet mask may look like 255.255.255.240. This means
it is a small network accommodating a maximum of 15 nodes in the network.
Default Gateway
:
For the routed packets, if the destination is not in the routing table, all traffic is put into the
device with the designated IP address, known as default router. Basically, it is a routing policy.
The gateway setting is used for Trap Events Host only in the switch.