We have already covered the topic of network addresses. The first ( ) in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a.( ) to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a ( ) address in an IP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B,and C. In classes A,B,and C,an address with all is for the netid and hostid (32 bits) defines a( ) address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However,a router will block a packet having this type ofaddress to confine the broadcasting to the ( ) network. Note that this address belongs to class E.
RUP是一个二维的软件开发模型,其核心特点之一是( )。RUP将软件开发生存周期划分为多个循环(cycle),每个循环由4个连续的阶段组成,每个阶段完成确定的任务。设计及确定系统的体系结构,制定工作计划及资源要求是在( ) 阶段完成的。
M公司的程序员在不影响本职工作的情况下,在L公司兼职并根据公司项目开发出一项与M公司业务无关的应用软件。该应用软件的著作权应由()享有。
软件质量属性通常需要采用特定的设计策略实现。例如,()设计策略能提高该系统的可用性,()设计策略能够提高该系统的性能,()设计策略能够提高该系统的安全性。
在会议上,由参会人员阅读程序,利用测试数据人工运行程序,对输出结果进行审查,以达到测试的目的。这种测试方法是()。