JVC SA-DV6000 - Manual (Page 43)

70
Other
s
About IP ad
dress/pr
o
xy ser
ver
\
About IP ad
dress
Global IP ad
dress and local IP ad
dress
There are 2 types of IP
addresses: “global IP
address” and “local IP
address”.
Global IP ad
dress:
Just as dif
ferent IP
addresses are needed on a network, all PCs using the Internet worldwide must use a unique
IP
address.
This IP
address is referred to as “global IP
address”.
Normally
, the global address is assigned by the IS provider
.
Local IP ad
dress:
In an environment not connected to the Internet (within a household, within a company
, etc.), separate IP
addresses can be used freely within a network. This IP
address is referred to as “local IP
address”.
IP ad
dress c
lasses
IP
addresses are categorized into 3 classes depending on the number of PCs structuring a network.
“Class
A
IP
addresses” are used for large-scale networks, “Class B IP
addresses” are used for medium-scale networks and “Class
C
IP
addresses” are used for small-scale networks.
Within a network, all IP
addresses must be of the same class. Each IP
address is structured by a series of 4 digit numbers sepa
rated
by a period.
The first number of the IP
address indicates the class.
Fir
st n
umber of the IP ad
dress
Class
Application (n
umber of PCs structuring the netw
ork)
1~127
Class
A
For large-scale networks (max. approx. 16 million units)
128~191
Class
B
For medium-scale networks (max. approx. 65,000 units)
192~223
Class
C
For small-scale networks (max. approx. 120 units)
* “224 ~ 255” are normally not used for IP
addresses.
For example, a network structured by a few PCs to dozens of PCs would use Class C IP
addresses.
Normally
, the following special IP
addresses are used when structuring a network.
Class indicated here
IP address
xxx.xxx.xxx.xxx
Class
Set IP address
Class A
10.0.0.0 ~ 10.255.255.255
Class B
172.16.0.0 ~ 172.31.255.255
Class C
192.168.0.0 ~ 192.168.255.255
About pr
o
xy ser
ver
A
proxy is a “relay point” for accessing the Internet. When enabling “Use a proxy server”, the proxy server will make access to
the
Internet. Since various access information is cached at this time, downloading will be faster when reloading the same information from th
e
Internet since the data is loaded from the proxy server
.