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Why can't I get on the National Open University Network?
Network problems and website problems.

1. network problems: the user's network connection is unstable, the quality is poor, or there are problems such as firewall, network restriction, DNS resolution, etc. , making it impossible to access the website.

2. Website problems: the website server is unresponsive, maintenance and upgrading, or the website is inaccessible due to too many visitors.