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Q.4 How should I make settings for the IP address / Subnet mask?
A
The IP address and Subnet mask settings vary depending upon your networking
environment (structure). Please consult your network administrator for details. Below is a
simplifi ed explanation of a company LAN set up for your reference.
If the computer connected to your company LAN has a Subnet mask of "255.255.255.0"
and an IP address of "192.168.100.1", set the Subnet mask to the same as your computer,
"255.255.255.0".
Set the IP address to 192.168.100.***. Make sure to set the last three digits,***, to a number
between 1-254 that is not the same as any other computer connected in your network.
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Q.5 What is a MAC address?
A
A MAC address is a unique number made up of alphabet and numbers that is assigned
separately to the components of network communication (computer, server, router, etc...).
Each MAC address is assigned to the hardware and is unique to that device, so there is no
chance for duplication.
Q.6 What is a port number?
A
When using TCP/IP communication with a LAN cable or via a phone line, port numbers are
assigned to distinguish one application from another.
Port numbers can be assigned from 0 to 65535. The numbers 0 to 1023 are already
reserved to communication services and are referred to as "Well Known Port Numbers".
[Well known port numbers] are: HTTP communication at 80 / FTP communication at 20 and
21 / SMTP communication (sending mail) at 25 / POP3 communication (receiving mail) at
110.
In order for communication to work properly these port numbers must be set correctly.
Q.7 What is a gateway?
A
A gateway is a term used to refer to a device or software that is used to link networks with
different standards.
For example, a gateway is needed when connecting a cell phone to the Internet or in any
case where you wish to connect two devices that are completely different. Gateway carries
with it the meaning of entrance and exit and a router may also be referred to with this term.
When making gateway settings, it is necessary to make IP address settings for the device
that will act as a gateway.
