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IPv6
IPv6 standard consists of 128 bits, which are divided into eight parts, each group containing four 16-bit digits and is
separated by a colon. IPv6 IP addresses are presented in a different format from IPv4, for example 3ffe:0305:0000:
0000:0000:0000:0000:0001.
Feature
Address space
Configuration setting
Priority control
Authentication
4.4 Network Protocols
Protocols are a set of rules that enable applications or devices to communicate with each other, allowing data to be
transmitted and received accurately.
4.4.1 Device Connection
This section introduces two types of protocol, one for facilitating network connectivity after the device obtains a
valid IP address and the other for building connection between networking devices and the Internet. The first type
includes DNS and DDNS and the second type includes PPPoE and UPnP.
DNS
When locating a network device, you need to input a numerical IP address, which is difficult to remember. DNS
(Domain Name System) allows you to input an IP address in text format and automatically maps it to the numerical
IP address of that network device. For example, when a user inputs a registered domain name (such as www.
vivotek.com), the DNS server automatically maps the domain name to an IP address such as 203.160.252.248.
DDNS
DDNS (Dynamic DNS) automatically matches a floating IP address to a registered domain name, allowing users
without a fixed IP address to easily connect to a network device. For example, if you register a domain name as
john-1.safe100.net, and the IP address for the first time connection is 203.160.252.200; the DDNS server will
match it to john-1.safe100.net. Next time the device is online with a different IP address, such as 203.160.252.201,
the DDNS will still match it to john-1.safe100.net. In this way, users only need to remember the registered domain
name to locate your network device (Figure 4.2).
Table 4.1 Comparison of IPv4 and IPv6
IPv4
IPv6
32 bits
128 bits
Manual
Auto
No
Yes
No
Yes
Comparison
IPv6 provides larger address space
IPv6 doesn't need an independent DHCP
IPv6 achieves higher video quality
IPv6 provides safer data transmission
Chap.4 IP Network
27
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