What is the DNS of Wenzhou Telecom?

The DNS of Wenzhou Telecom is 6 1. 153.177.196,61.177.6/kloc-0.

61.153.177.196 and 61.153.177.197, the original owner. Click the properties of online neighbors, click the properties of local connection, select Internet protocol, and click Properties to modify the DNS address to 61.153.177.196 and 61.153.5438+.

Software-defined network (SDN) is a new network innovation architecture of Emulex network and a way to realize network virtualization. Its core technology, OpenFlow, separates the control plane and data plane of network devices, thus realizing flexible control of network traffic and making the network as a pipeline more intelligent.

After the network in the traditional IT architecture is deployed according to the business requirements, if the business requirements change, it is very cumbersome to modify the configuration of the corresponding network devices (routers, switches, firewalls). In the rapidly changing business environment of Internet/mobile Internet, the high stability and high performance of the network are not enough to meet the business needs, but flexibility and agility are more critical. What SDN does is to separate the control right on the network equipment and manage it by a centralized controller, without relying on the underlying network equipment (routers, switches, firewalls), thus shielding the differences with the underlying network equipment. The control right is completely open, and users can customize any network routing and transmission rules and policies they want to achieve, thus being more flexible and intelligent.

After the transformation of SDN, there is no need to repeatedly configure the router of each node in the network, and the devices in the network are automatically connected. You only need to define simple network rules when using it. If you don't like the built-in protocol of the router, you can modify it by programming to achieve better data exchange performance.

If there are several services in the network, such as SIP, FTP and streaming media, and the total network bandwidth is certain, then if the streaming media service needs more bandwidth and traffic at a certain moment, it is difficult to handle in the traditional network, but it is easy to realize in the network after SDN transformation. SDN can temporarily thicken the "pipeline" of streaming media, increase the bandwidth of streaming media, and even close the "pipeline" of SIP and FTP when the demand for streaming media decreases.