Furuno WR2120 Installation Manual page 62

7) IoS (Internet over Satellite): It allows a user to access the Internet via a satellite that orbits the earth.
A satellite is placed at a static point above the earth's surface, in a fixed position. Because of the
enormous distances signals must travel from the earth up to the satellite and back again, IoS is
slightly slower than high-speed terrestrial connections over copper or fiber optic cables. Typical
Internet over satellite connection speeds (standard IP services) average around 492 up to 512
Kbps.
8) Fiber Optic Network: The fastest way to access the Internet, but it's also the most expensive. Fiber
converts electrical signals to light which travels through tiny glass filaments. Transmission speeds
vary greatly depending on several factors, including the distance between the transmitting location
and the receiving location, the amount of bandwidth allotted by the Internet service provider, and
use of the fiber-optic lines for other services. The FCC says that most modern fiber connections
transmit at speeds of tens to hundreds of Mbps faster than other broadband options
Summary:
We recommend you to use the fiber optical network or any faster network for transferring the weather
observation data to the data center server or office. If the radar location does not have access to any
fast network (up/download minimum 8 Mbps constantly) but can connect to a wireless network then
use the internet just for remote operation and save the data to an external HDD. A 6TB HDD can save
up to 6 months of data depending on observation settings without requiring network transfer.
In addition there are ISP's (Internet Service Provider) that may make a separate contract to provide
internet access with a suitable communication network (DSL, wireless, fiber optic network, etc.).
A LAN (Local Area Network) setting must be made for using internet access on DPU. First it requires
an IP (Internet Protocol) address setup in DPU.
that identifies the location of
between 0 and 255 (these represent 8 bits or 8 ones and zeros).
In order for a device to send information on a local area network when connected to the same switch it
needs a "private" IP address. These usually fall within the 192.168.X.X or 10.X.X.X realm. X represents
a number between 0 and 255.
Once it reaches the Internet via a router it needs to have a "unique" IP address called a "public" IP. This
is given by an Internet Service Provider. Every computer has its own unique number which cannot be
duplicated on the Internet. Any traffic for this IP address will be routed to it.
Computers need their own numbers. However there is no way to remember the IP of all websites. To
help DNS was created. DNS is the Domain Name System and it translates the web address into an
actual "public" IP. It can be displayed by using the command prompt (start > run > type cmd.exe) and
type "ping" for the web address. At first there is a pause while DNS translates the IP and then it will
display the ping as the unique IP address number formatted as xxx.xxx.xxx.xxx which is specific
web address's web server.
The SPU system is using IPv4: 192.168.1.55 and it is using the private address inside LAN.
Class
A 10.0.0.0
B 172.16.0.0
C 192.168.0.0
DPU device. This is similar to a home address. It is 4 sets of numbers
Start End
10.255.255.255
172.1.255.255
192.168.255.255
An IP address is basically a numerical form address
Subnet
mask
255.0.0.0
255.240.0.0
255.255.0.0
20
S2E-17-0209_IM_WR2120_C
No. of
addresses
16,777,216
1,048,576
65,536
to the