USR-TCP232-30x Series User Manual
The mask is a 32-bit number corresponding to an IP address. Some of these numbers
are 1, and the others are 0. The mask can divide the IP address into two parts: the
subnet address and the host address. The part of the IP address corresponding to the 1
bit in the mask is the subnet address, and the other bits are the host address. The mask
for class A addresses is 255.0.0.0, the mask for class B addresses is 255.255.0.0, the
mask for class C addresses is 255.255.255.0.
The default gateway in the host is usually called the default route. The default route
(Default route) is the route chosen by the router when no other route exists for the
destination address in the IP packet. All packets whose destination is not in the router's
routing table will use the default route.
The IP address of the DNS server.
When users need to access information online through domain name, like
www.pusr.com. DNS translates domain names to IP so browsers can load Internet
resources.
3.1.3. Serial port settings
The main function of the serial device server is to carry out two-way transparent transmission of standard
serial bus data (RS-232, RS-485, RS-422) and standard Ethernet data supporting TCP/IP protocol to solve
common serial equipment Networking problems on the Internet. The Port configuration page can configure the
parameters of the serial port and socket, as shown in following picture.
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