問題：
You are the administrator of PConline's network. You configure a Windows 2000 Server computer as the DNS server for your network. You create both standard primary forward lookup and reverse lookup discover that when you use the nslookup utility, you cannot resolve host names from IP addresses on your network. You also discover that when you run the utility, you receive the following error message. "Unable to resolve target system name."
What should you do?
A. Configure the DNS to forward requests to an external DNS
B. Install a WINS server and configure DHCP to issue the IP address of the WINS server to all DHCP clients
C. Create PTR (pointer) records in your reverse lookup zone
D. Copy the systemrootsystem32dnscachesamples to systemrootsystem32dnscache
Select the 1 best answer
作爲一名PConline的網絡管理員，你配置了一臺Windows 2000 Server作爲企業網絡的DNS服務器。你創建了標準主區域的正向查找與逆向查找，但你發現當你在局域網絡中使用nslookup命令行時，不能夠將IP位址解析爲主機名稱，而當你使用命令時，收到了這樣的'提示“Unable to resolve target system name.”
解答：
Tracert 命令是用來檢查通往遠程系統的路由狀況的，它必需將主機名解析爲IP位址以及將IP位址解析爲主機名來執行，如果tarcert不能夠工作，看起來很像是反向查找機制沒有工作的原因。
Nslookup命令行使用逆向查找來查詢並返回主機名稱。
逆向查找區域雖然建立了，但逆向查找區域並沒有被激或者其中並沒有PTR記錄，通常就是這種原因造成上述問題的出現。
正確答案：C