Introduction to multicast of IPv6 network protocol

When we use IPv6, I wonder if you have found some excellent features of the IPv6 network protocol? Now let's summarize the content in this regard. Through understanding IPv6, we can find more services. Now let's take a look at its basic technologies.

I. Question proposal

With the development of computer technology, network technology and multimedia technology, modern distance education achieves a networked and real-time interactive teaching form. In particular, the development of Internet technology has promoted the emergence of many network universities and network schools. The number of educational websites is also growing rapidly, and the number of online teaching resources is also growing, it can be said that modern distance education has entered a period of vigorous development. However, due to network bandwidth and transmission mechanisms, most of the content on educational websites currently focuses on static teaching materials, but few video and audio streaming media teaching information, even if some websites support online browsing and downloading of video and audio streaming media content, it is difficult to achieve two-way interaction because of the slow network transmission rate, so the effect is not satisfactory. This has largely weakened the attractiveness of online education to many learners, and thus greatly reduced the quality and effectiveness of distance education.

The emergence of IPv6 not only solves the problem that 1Pv4 address space is almost exhausted, but also improves the basic Header Format of IP data packets. The most important thing is that IPv6 can better support multicast, video and audio streaming media teaching information can be smoothly transmitted without a significant increase in network bandwidth, which reduces network bandwidth and network load, in addition, it provides personalized and lifelong education anytime, anywhere. Therefore, the IPv6-based Multicast technology provides a better way to solve the above problems of distance education.

II. Introduction to IPv6 network protocols and Multicast Technology

IPv6 Performance Overview

IPv6 is proposed to solve the problem that IPv4 address space is nearly exhausted. Its performance mainly includes:

1. Huge address space

IPv6 uses a 128-bit IP address, that is, IPv6 provides 2128 address spaces. In the image, there will be more than 1000 IPv6 addresses per square meter on the earth.

2. Simple addressing and routing Methods

The IPv6 address type is based on a layered network topology. This structure is of great benefit to network security. At the same time, IPv6 improves the basic Header Format of the IP packet. It has only 6 domains and 2 address spaces. This simplified header not only contains a small number of fields, but also has a fixed header length, which makes the hardware implementation of the router easier. In route analysis, IPv6 does not split data, further reducing the routing load.

3. Better security features

IPv6 provides several important security functions. The IPv6 network protocol specification specifies the "Authentication Header" and "encapsulation security net load ". The authentication function provides a mechanism for the recipient to confirm that the source IP address of the IP Group is correct and its content is not modified during transmission; the "encapsulation security net load" function ensures that only valid recipients can read the content of the IP Group. This identity authentication method can effectively prevent network eavesdropping, so as to ensure the security of users and systems, and to a certain extent, it can prevent hackers from exploiting network protocol vulnerabilities for cracking activities.

4. Support for Multicast

The IPv6 network protocol provides a new cluster communication address method-multicast. multicast uses the multicast capability of the IP network to allow the router to copy packets to multiple data channels at a time, realize one-to-multiple-point or multi-to-multiple-point data transmission. Multicast can greatly save network bandwidth, because no matter how many target addresses there are, only one packet is transmitted on any link of the network, thus reducing network load.