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
12) Which protocols can NetBIOS bind to? (Select all that are applicable.) (NETBIOS可以绑定在哪个协议上，选择所有可能的协议)？
A. Appletalk
B. IPX
C. IP
D. NetBEUI
13) What layers do not exist in the TCP/IP model that are in the OSI model (哪层不在T C P / I P模型中，但它在O S I模型中)？
A. Application, presentation, and network
B. Presentation, session, and data link
C. Session, network, and physical
D. Presentation, data link, and physical
14) What is a socket in the transport layer (传输层中的套接字是什么)？
A. The socket is an IP address plus a port
B. An API that makes the transport layer independent
C. An API that allows multiple applications to share a network connection
D. A function that makes remote procedures appear to be local
15) What is a port (什么是端口)？
A. An API that makes the transport layer independent
B. An API that allows multiple applications to share a network connection
C. A function that makes remote procedures appear to be local
D. The point where upper-layer processes access transport layer services
16) Which of the following services uses a process called windowing (下面的哪一个服务使用了所谓的窗口机制)？
A. Reliable data transfer
B. Connection-oriented virtual circuit
C. Buffered transfer
D. Resequencing
E. Multiplexing
F. Efficient, full-duplex transmission
G. Flow control
32) What is the sequence number in a TCP header used for (在T C P报头中的顺序号的作用
是什么)？
A. Acknowledgments
B. Reordering of the octets received
C. Rejecting duplicate octets
33) Variable sliding windows provide an explicit mechanism for notifying TCP if an intermediate node (for example, a router) becomes congested (在中间节点，例如一个路由器拥
塞的情况下，可变滑动窗口提供了通知T C P的显式机制)。
A. True
B. False
34) Which of the following parameters is not a part of UDP header (下面的哪一个参数不是U D P报头的一部分)？
A. Source port
B. Urgent pointer
C. Checksum
D. Length
E. Destination port
35) When a router has been configured for UDP flooding, the source address might change,but the destination address will not change as the datagram propagates through the network (当一个路由器已经配置为U D P泛洪时，当数据报在网络上传播的过程中，源地址可能改变，但是目的地址不会改变)？
A. True
B. False
36) The spanning-tree algorithm allows (生成树算法允许)：
A. Forwarding of packets with no control
B. Forwarding of broadcasts to an interface which already has received the broadcast
C. Prevention of duplication of forwarding of packets
D. A and B only
37) IP helper addresses are a form of _ _ _ _ _ _ _ _ _ _ _ _ _ _ addressing and require the command specification of _ _ _ _ _ _ _ _ _on every interface receiving broadcasts that need to be forwarded (IP辅助地址是一种什么类型的寻址方法，在每一个接收到需要转发的广播接口上需要什么命令说明)？
