JVC KA-DV350U Instructions Manual page 49

Glossary
● IP address
Identification number assigned to each computer that
is connected to a network. The address is used for
communication between network devices.
●
Global IP address:
Just as different 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 address:
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 ad-
dress".
●
IP addresses are categorized into 3 classes
depending on the number of PCs structur-
ing 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 ad-
dresses" 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 separated by a
period. The first number of the IP address indi-
cates the class.
IP address
First number of Class
the IP address
1 to 127 Class A
128 to 191 Class B
192 to 223 Class C
* "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 Set IP address
ClassA 10.0.0.0 - 10.255.255.255
ClassB 172.16.0.0 - 72.31.255.255
ClassC 192.168.0.0 - 192.168.255.255
● Port number
Number used for detecting applications and
service during TCP/IP communication.
● TCP/IP
Abbreviation for Transmission Control Pro-
tocol/Internet Protocol and is one of the pro-
tocols used during network connection.
● UDP
Different from TCP, UDP is a low-level pro-
tocol that does not perform receive checks.
In some cases, missing and distorted im-
ages may occur due to packet loss.
● About proxy server
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 the
Internet since the data is loaded from the
proxy server.
Class indicated here
xxx.xxx.xxx.xxx
Application (number of PCs
structuring the network)
For large-scale networks
(max. approx. 16 million units)
For medium-scale networks
(max. approx. 65,000 units)
For small-scale networks
(max. approx. 120 units)
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