3Com Network Video Server FlexWATCH 3110 - Manual (Page 19)

Network Video Server User’s Manual
Seyeon Tech Co., Ltd 19
IP assignment
1 Key Words for Network
LAN (Local Area Network) : Under the LAN network, any network device in the same
LAN network can be accessed by any other network device. But LAN network can not be
accessed from the Internet (WAN).
Most of case, LAN is built after Router which is connected to WAN network so that
Network device in the local area network can access to the Internet through Router. Most
of case, LAN networked device can not be accessed from the Internet (WAN), unless it is
not configured to be accessed from the Internet through NAT function of router.
WAN (Wide Area Network) : WAN enables all network device can be accessed by each
other over the Internet. It included Leased Line, Cable modem, xDSL, ISDN and
Telephone line etc.
IP address : IP address is abbreviation of Internet Protocol address which allows all
network devices can communicate other over the network using Internet protocol. Each
network device has its own unit IP address whether or not it is in the LAN or WAN
network. Therefore network devices can be accessed by other network device from either
LAN or WAN (Internet).
For example, www.yahoo.com is a web server which has its own IP address so that any
body can has access to Yahoo web site. Like most of public web site has its own IP
address. Although IP address can not be seen by the client, domain name
(www.yahoo.com) is automatically converted into IP address by DNS server.
Static IP address : A static IP address is an IP address permanently assigned to
computer or network devices in a TCP/IP network. Static IP address is usually assigned
to network devices which are consistently accessed by any users. For instances,
www.yahoo.com has global static IP address. Thus, any body can access to the site. If
you want to view live video stream from FlexWATCH
TM server over the Internet, you need
to assign Global Static IP address.
Depending the network Public Static IP(WAN) or Private Static IP can be assigned to
network device.
- INTPLUS [2005] -