Packet InterNet Croper(ping) 使用ICMP的回應請求和回覆來測試網路上節點的IP棧是否初始化及是否存活。traceroute 通過使用TTL的逾時機制和ICMP的出錯資訊的通報機制,顯示通往目標網路路徑上的路由器列表。這個命令將不能在DOs提示符下使用。tracert 同traceroute一樣的命令,而它是一個微軟Windows命令,它不能在Cisco路由器上運行。arp -a 在WindowsPC機上顯示IP到MAC地址的映射。show ip arp 與arp -
3.1 common programming model3.1.1 System.ObjectEvery type in .NET is an object, meaning that it must derive directly or indirectly form the Object class. The Object class exposes the public methods listed in table 3-1, which you can invoke on any
1 create a CLR User-defined function.(1) create a Database -- SQL Server Project; Add a new item(User-defined function); Wirte a helloword functionUdf helloworldCode highlighting produced by Actipro CodeHighlighter
作者: 冷月(TinyHU) SQL2005由於加入了ROW_NUMBER()函數,要做資料分頁就很簡單了。如一個產品表的分頁: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->SELECT TOP(10) * FROM (SELECT prodcode,name, ROW_NUMBER() OVER (ORDER BY prodcode)
2.6.1.4 Class, Properties, indexerssee detail in the next chapter2.6.1.5 InterfacesInterfaces support exactly the same concept as a C++ abstract base class(ABC) with only prure virtual functions. An ABC is a class that declares one or more pure