1) Match the following application layer services to their corresponding transport layer
protocol port. (匹配下列的应用层服务和它们对应的传输层协议端口)：
A. SMTP 1. TCP/23
B. FTP 2. TCP/25
C. TFTP 3. TCP/80
D. Te l n e t 4. TCP/21
E. HTTP 5. UDP/69
F. DNS 6. TCP/53
2) Which OSI reference model layer does Telnet function at (Te l n e t在哪一个O S I参考模型层运作)？
A. Transport 下载
B. Network
C. Session
D. Application
3) How many layers does the TCP/IP protocol suite have, compared to the OSI reference
model (和O S I参考模型相比，T C P / I P协议具有几层)？
A. TCP model has 4, OSI model has 6
B. TCP model has 7, OSI model has 8
C. TCP model has 4, OSI model has 7
D. TCP model has 7, OSI model has 4
4) The TCP/IP protocol suite has a formal session layer that includes NetBIOS、RPCs and
TLI functions (TCP/IP协议套件具有包含N e t B I O S、R P C和T L I功能的一个正式的会话层)。
A. True
B. False
5) What is the function of RPCs (RPC的功能是什么)？
A. To move files from remote PCs to a local PC
B. To make remote function calls transparent, so they appear to be local
C. To initialize a program on a remote PC
D. To send a procedure that is local to a remote node for processing elsewhere
6) What does RPC stand for (RPC代表什么)？
A. Remote personal computer
B. Reserved-programming call
C. Routed-procedure call
D. Remote-procedure call
7) What OSI reference model layer do sockets function at (套接字在O S I参考模型的哪层运
作)？
A. Application
B. Presentation
C. Session
D. Transport
E. Network
F. Data link
G. Physical
8) What function do sockets perform (套接字的功能是什么)？
A. They make remote functions appear local, transparent to the user
B. They transfer files to and from remote nodes
C. They make the transport layer independent
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