3com FlexWATCH 3110 Manual De Usuario

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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] -