SHARX SECURITY SCNC3904, Руководство пользователя

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Glossary: A quick Review of Networking Terminology
To participate in a computer network, each device needs an “Internet
Protocol” address
that is unique on that network. This IP address consists of 4
groups of numbers separated by periods. For example: 192.168.0.2
IP addresses are assigned to a device either automatically by the router or
manually by a person who is setting up the network. The router is the device
that is managing the addresses and the flow of data between those addresses
on your network. Sometimes the routing function is not provided by a
separate device and is built into your cable modem or DSL modem.
When you first plug the camera into your router with the network cable, the
camera asks the router to get a valid IP address, and the router provides the
next available IP address on the local network. With “
local network ” or LAN
we’re referring to your own home or business network. On the other hand,
the term
WAN or “ Wide Area Network ” refers to the global internet.
Your router is sometimes also called a gateway because it is like a gateway
from your own local network to the internet. Unless you have an all-in-one
combination of modem and router you’ll probably see that your router has
one network jack marked WAN which connects to the cable or DSL modem
and a set of 2 or 4 jacks marked LAN for your local network devices.
Your router will have 2 IP addresses of its own, a WAN IP address that
identifies it on the internet and a LAN IP address that identifies it on your local
network. The LAN IP addresses often start with 192.168 or 10.0
From any computer on your network it is easy to find the WAN IP address of
your router just by opening a browser and going to
www.checkip.org
Since your own private network devices including your camera are not directly
visible from the internet, for remote access you would typically use your
router’s WAN IP address together with some instructions to your router to
forward the requests from the internet to your camera.
The messages going back and forth between the camera and the router
regarding the initial IP address are called
DHCP for “Dynamic Host
Configuration Protocol”.
Each device also has a unique hardware address that is called a MAC address .
This MAC address is unrelated to Macintosh computers. What’s special about
this hardware address is that it is totally unique to each network device.