Vro technology Overview: roaming routing (1)

As we all know, routers play an important role in computer networks. Tens of thousands of routers all over the world constitute a giant Information Network "bridge" where the Internet is running around us day and night ". This bridge can connect different networks, select data transmission paths, and block illegal access. As the core equipment of the IP network, vro has become a key technology in the information industry. Its Equipment plays an increasingly important role in data communication, in addition, the technology is complex, and manufacturers have too many choices for router implementation. Currently, vrouters are widely used in all walks of life. products of different grades have become the main force for implementing internal connections between backbone networks, interconnection between backbone networks, and interconnection between backbone networks and the Internet.

The reliability of routers directly affects the quality of network interconnection. Therefore, in the field of campus network, Regional Network, and even Internet research, router technology is always at the core position, and its development history and direction have become a microcosm of Internet research. As China's network infrastructure and information construction are in the ascendant, we will discuss the basic knowledge of routers and their role, position and development direction in the interconnected networks, it is of great significance to clarify the plausible concepts of vrouters and network interconnection in the network market.

Roaming router:

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Routing Technology and Development:

To explain the concept of a router, you must first know what routing is. The so-called "routing" refers to the behavior and action of transmitting data from one place to another. Generally, during the routing process, information passes through at least one or more intermediate nodes. In general, people will compare routing and switching, mainly because the functions of the two are the same in the eyes of common users. In fact, the main difference between routing and switching is that switching occurs at the Layer 2 data link layer of the OSI reference model), while routing occurs at the Layer 3, that is, the network layer. This difference determines that different control information needs to be used in the process of routing and exchange of mobile information. Therefore, the two methods to implement their respective functions are different.

As early as 40 years ago, there have been discussions on the routing technology, but it was not until 1980s that the routing technology was gradually commercialized. The reason why the routing technology was not widely used at the beginning was that the network structure before 1980s was very simple and the routing technology was useless. It has not been until the last decade that large-scale interconnected networks have become popular, providing a good foundation and platform for the development of routing technology.

Vro concept and working mechanism:

A Router is a machine that performs routing actions. Its English name is Router. It is a network device that connects multiple networks or CIDR blocks, it can translate data from different networks or CIDR blocks so that they can "read" each other's data to form a larger network.

The core communication mechanism of the Internet is a data transmission model called "Storage forwarding. In this communication mechanism, all data flowing on the network is sent, transmitted, and received in the form of packets Packet. Any computer connected to the Internet must have a unique network address to communicate with other machines and exchange information ". Data is not directly transmitted from its "Starting Point" to "destination". On the contrary, data is divided into segments of a certain length according to specific standards before transmission-data packets.

The Network Address of the destination computer is added to each data packet, which is like an envelope with a good recipient address. Such data packets will not be lost during online transmission ". Before arriving at the destination, these packets must be transmitted through multiple communication devices or computers on the Internet. The operation of the station in ancient times is an image of this process. On the internet, routers play the role of forwarding data packets "station.

Vro functions:

A common network topology of a wireless router. A router has two typical functions: Data tunnel and control. The data channel functions include forwarding decision, backplane forwarding, and output link scheduling, which are generally completed by specific hardware. The control functions are generally implemented by software, it includes information exchange with neighboring routers, system configuration, and system management.