Abstract: A distributed synchronization system including a management device and a plurality of synchronization devices is provided. The management device includes a network input interface and a network output interface, and is configured to: decode a precision time protocol packet to obtain a reference 1 pulse per second signal, a reference frequency signal, and reference time of day information; send a reference synchronization signal and a reference control signal to a first synchronization device through the network output interface. The reference synchronization signal includes the reference 1 pulse per second signal, the reference frequency signal and the reference time of day information. The reference control signal requests the first synchronization device to synchronize with the management device.

Abstract: A network detection method links multiple nodes residing in a network topology to form multiple edges and creates snake paths through the edges using a snake algorithm. The routing frequencies of each of the snake paths is calculated, and software-defined network (SDN) policy flows to each of the nodes are produced and applied. The health and performance status, and available bandwidths, of the snake paths are dynamically detected via packet flows using a pathChirp bandwidth detection method.

Abstract: A system for defending against malicious website includes an intelligent module and a deploying module. The intelligent module collects and stores information as to malicious website from third-party trusted websites. The malicious website is rated for risk and a malicious website having a high risk is preset as a dangerous website, and a deploying signal is sent after the preset dangerous website is set. The deploying module adds the dangerous website information preset dangerous website to a flow table and deploys the flow table to a plurality of OpenFlow (OF) switch. An OF switch can detect whether a browsing website to be opened by a user is recorded in the flow table, and if so, the OF switch blocks the browsing of such website. A method for defending against malicious website is also disclosed.

Abstract: A cloud service device includes a data center that stores video preview images. A first message requesting previewing multiple images from is received from a multimedia device. Multiple offsets corresponding to the multiple images according to the first time interval and the first image number are calculated and time points corresponding to the multiple images according to the multiple offsets and the first preview time point are calculated. The multiple images from the data center according to the calculated time points are obtained and transmitted to the multimedia device to preview.

Abstract: A network detection method links multiple nodes residing in a network topology to form multiple edges and creates snake paths through the edges using a snake algorithm. The routing frequencies of each of the snake paths is calculated, and software-defined network (SDN) policy flows to each of the nodes are produced and applied. The health and performance status, and available bandwidths, of the snake paths are dynamically detected via packet flows using a pathChirp bandwidth detection method.

Abstract: A cloud service device includes a data center that stores video preview images. A first message requesting previewing multiple images from is received from a multimedia device. Multiple offsets corresponding to the multiple images according to the first time interval and the first image number are calculated and time points corresponding to the multiple images according to the multiple offsets and the first preview time point are calculated. The multiple images from the data center according to the calculated time points are obtained and transmitted to the multimedia device to preview.

Abstract: A packet forwarding device stores a predetermined threshold and a predetermined condition value of a first wide area network (WAN) port, and forwards packets that comply with the predetermined condition value via the first WAN port and forwards packets that do not comply with the predetermined condition value via a second WAN port. The packet forwarding device forwards some of the packets that do not comply with the predetermined condition value via the first WAN port in order to balance loads of the first and second WAN ports if the traffic value of the packets forwarded via the first WAN port is equal to or less than the predetermined threshold.

Abstract: A packet forwarding device stores a predetermined threshold and a predetermined condition value of a first wide area network (WAN) port, and forwards packets that comply with the predetermined condition value via the first WAN port and forwards packets that do not comply with the predetermined condition value via a second WAN port. The packet forwarding device forwards some of the packets that do not comply with the predetermined condition value via the first WAN port in order to balance loads of the first and second WAN ports if the traffic value of the packets forwarded via the first WAN port is equal to or less than the predetermined threshold.