hp重定向 Server 1 (address 1) (address 2) User Client Intermediate DNS name server 3 step 1: Address request (URL) step 1: Address request reaches the DNs Server N step 2: WWeb-server. Tn) selection (address N) Step 3: Address mappIng (URL - address 1) step 3: Address mapping (URL - address 1) step 4: Document request (address 1) step 5: Web-server seection step 6: Http redirectlon Step 7: Document request (address 2) step 8: Document response (address 2)http重定向