Broken/dead links on a website are a big problem for both visitors (result in bad user experience or misleading) and webmasters (seriously affect the SEO scores). For large sites, to find out all these links manually can be a nightmare.
Today, all laptops come with wireless network adapter. At the same time, the huge convenience of wireless network is obvious. But since it is subject to technical bottleneck, the stability and quality of wireless network always can't catch up with wired network. That is to say, the most annoying thing when using a wireless network is the poor signal, especially you don't know which one is better.