# Web working [TOC] # DNS Detail ## Domain Hierarchy ### Top-Level Domain ![](https://i.imgur.com/KWZ3xtz.png) - GTLD - CCTLD ### Second-level Domain ![](https://i.imgur.com/IO0KCQu.png) ### Sub domain ![](https://i.imgur.com/MrMLOC0.png) #### limit ![](https://i.imgur.com/ISg145K.png) ## Records type ### A Record ![](https://i.imgur.com/0L9Drv1.png) ### AAAA Record ![](https://i.imgur.com/OL7l3Mr.png) ### CNAME Record ![](https://i.imgur.com/lSCQsFG.png) - bolg.meowhecker.com -> meowhecker.com - shop.meowhecker.com -> meowhecker.com - fish.meowhecker.com -> meowhecker.com Nslookup ![](https://i.imgur.com/sf5ZtiO.png) ### MX Record Query SMTP server IP ![](https://i.imgur.com/6IeHwPR.png) Nslookup ![](https://i.imgur.com/4eHqltq.png) ### TxT Record ![](https://i.imgur.com/cwLrdfh.png) Nslookup ![](https://i.imgur.com/dzDZC5H.png) ## DNS request ![](https://i.imgur.com/yjRtzov.png) # HTTP ## Request/Response ### URL ![](https://i.imgur.com/AGhTkzp.png) ### Maker Request ![](https://i.imgur.com/FhuXZZw.png) ![](https://i.imgur.com/FeZfzj9.png) ### Response ![](https://i.imgur.com/q9DYUTF.png) ## HTTP Method ![](https://i.imgur.com/iiM37cS.png) ## HTTP status code ### Information response 0~199 ![](https://i.imgur.com/xb1fRU5.png) ### Success 200~299 ![](https://i.imgur.com/wYHRn07.png) ### Redirection 300~399 ![](https://i.imgur.com/lYbXcwm.png) ### Client Error 400~499 ![](https://i.imgur.com/0tmprZk.png) ### Server Error 500~599 ![](https://i.imgur.com/3Bxugtx.png) # Website working ![](https://i.imgur.com/QQALbnB.png) ## Load Balances ![](https://i.imgur.com/31R6PCd.png) ## CDN ![](https://i.imgur.com/7sYolhu.png) ## WAF ![](https://i.imgur.com/jXZDmE4.png) ## Web server working ### Web server ![](https://i.imgur.com/41VAtfc.png) ### Virtual host ![](https://i.imgur.com/AsG5JNh.png)