在采用虚存的系统中,要求程序运行前不必全部装入内存但在运行过程中必须一直驻留在内存。
A. 对
B. 错
1. How does Internet scale to billions of hosts? (Describe what structure and levels are used to organize the hosts, and calculate the numbers of entities at each level.)互联网是如何扩展成数以亿计的主机结构的?(详细说明主机的结构和层次组织,并计算出每个层次的实体数量。)
2. Routing vs. switching: stateful or stateless, connection-oriented or connectionless, matching or in-dexing? (Associate these features with routing and switching.)路由与交换机对比:哪个是有状态或无状态的,哪个是面向连接或无连接的,哪个是匹配或索引式的?(将这些功能与路由和交换联系起来。)
3. What may increase or decrease the latency inside the Internet? (What are the factors that might increase or decrease the latency of queuing, transmission, processing, and propagation, respectively?)3.哪些因素可能增加或减少互联网中的延迟?(有哪些因素可能分别会增加或减少排队,传输,处理和传播延迟?)