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As a matter of fact, there is absolutely no problem, but only situation that should be solved. In order to enforce acceptable network use policies and supply security like anti-virus, anti-malware or anti-spam services computer user has the capacity to use proxy servers. To lessen network traffic with an ability to enhance network security would be the most tempting and indispensable functions of proxy servers. A proxy server enhances network security by controls for receiving and forwarding (or rejecting) requests between isolated networks, by way of example, forwarding requests across a firewall. A proxy server lessens network traffic by rejecting unwanted requests, forwarding requests to balance and optimize server workload, and fulfilling requests by serving data from cache in lieu of unnecessarily contacting the destination server.
Is a new type of ballastless track, with reinforced concrete slabs, and under the big board with emulsified asphalt cement mortar as the first adjustment layers (or overlay on a cushion of high molecular elastic material layer) consisting of orbit. This kind of track is suitable for stone roadbed or non - ballasted deck. The asphalt concrete bearing layer shall be installed on the soil foundation. This kind of track integrity is good, the line is stable, the maintenance workload is small, but the cost is high, the construction period is long. Japanese railways have been used in the Shinkansen
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