计算机网络原理第二章答案

这是计算机网络原理系列答案第二章，是我个人总结的 有问题欢迎指出

ReviewQuestion:

R.1. What is the difference between network architecture and application architecture?

Answer:
网络体系结构是指将通信过程组织为多层（例如，五层互联网体系结构）。 另一方面，应用程序架构是由应用程序开发人员设计的，并规定了应用程序的广泛结构（例如，客户端-服务器或P2P）

R2 List five nonproprietary Internet applications and the application-layer protocols that they use.

答：
applications protocols
e-mail SMTP
WEB HTTP
streaming multimedia HTTP ,RTP
file transfer FTP
remote terminal access Telnet

R3 What information is used by a process running on one host to identify a process running on another host?

目标主机的IP地址和目标进程中的套接字端口号。

R5 For a communication session between a pair of processes, which process is the client and which is the server?

答：发起通信的过程是客户端；等待联系的进程是服务器。

R6 Suppose you wanted to do za transaction from a remote client to a server as fast as possible. Would you use UDPor TCP? Why?

您将使用UDP。使用UDP，事务可以在一个往返时间(RTT)内完成—客户端将事务请求发送到UDP套接字，服务器将应答发送回客户端UDP套接字。使用TCP时，至少需要两个RTTs—一个用于建立TCP连接，另一个用于客户机发送请求，服务器发回应答.

R7. Recall that TCPcan be enhanced with SSLto provide process-to-process security services, including encryption. Doe