Because if a folder at the end of the forward slash, will generate two HTTP requests, will affect the efficiency.

if this chain by writing: href=http://www.jb51.net//web/" http://www.w3school.com.cn/html" , can produce two HTTP requests to the server.

this is because the server will add a forward slash to the address, and then create a new request, like this: href=http://www.jb51.net//web/" http://www.w3school.com.cn/HTML/" .


This concludes the body part