3Com Security Camera Network Video Server User Manual

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of 105
 
Network Video Server User’s Manual
Seyeon Tech Co., Ltd
20
Dynamic IP address : A dynamic IP address is an IP address that is automatically
assigned to a client station (computer, network equipment, etc.) in a TCP/IP network.
Dynamic IP address is typically assigned by a DHCP server, which can be a computer on
the network or another piece of hardware, such as router. A dynamic IP address may
change every time your computer connects to the network
DHCP (Dynamic Host Configuration Protocol) : DHCP is software that automatically
assigns IP addresses to client stations logging onto a TCP/IP network. DCHP eliminates
troublesome job to manually assign permanent IP addresses to every device on your
network. DHCP software typically runs in servers and is also found in network devices
such as routers. Most of Cable Modem for Internet access uses DHCP Public IP address
and Private IP address : Public IP address is an IP address which can be identified
uniquely in Internet world. All IP addresses excluding private IP addresses are public IP
addresses. Private IP addresses range from 10.0.0.0 until 10.255.255.255, and from
192.168.0.0 to 192.168.255.255. Generally speaking, private IP addresses are used in
local area network which are hidden from the Internet world. Also, when public IP
addresses not enough, private IP addresses are used while sharing global IP addresses
Router : Router is a network hardware which routes either Private or Public IP address
to Public network so that network device between private IP network and Public IP
network can communicate over the network. Router has NAT (Network Address
Translation) function and through this function Public IP address will be mapped into
private IP network so that Network device in the private IP address can be added from
Internet.
Hub : Hub is a hardware which relay transmission between Router and Network device.
There are two types of Hub. One is Dummy hub and the other one is Switching hub. Note
that Hub will be used in the local network only.
NAT (Network Address Translation) : Network Address Translation (NAT) translates
multiple IP addressed on the private LAN to one public address that is sent out to the
Internet. This adds a level of security since the address of a PC connected to the private
- INTPLUS [2005] -

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