(1. Break the bottleneck and make the WAN use fast? 1.1 Overview: 1.1.1 WAN Overview Wide Area Network (WideAreaNetwork, WAN for short) is a cross-regional data communication network, usually spanning a region, country or even multiple countries. Its attributes are: mainly provide communication-oriented services, support users to use computers for long-distance information exchange; wide coverage, long communication distance, more factors to be considered, such as networking cost, line redundancy, bandwidth Utilization and error management, etc.; the telecom operators or users are responsible for the formation, management and maintenance, which is difficult to manage; the bandwidth utilization rate is low, and the user experience is far from the LAN (local area network))
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