CCNA考试自测题及答案4套.docx

CCNA考试自测题及答案4套试题11） Match the fol lowing appIication 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/23B. FTP 2. TCP/25C. TFTP 3. TCP/80D. Te I n e t 4. TCP/21E. HTTP 5. UDP/69F. DNS 6. TCP/532） Which OS I reference model layer does Telnet f unct i on at （TeI n e t在哪一个0 S I参考模型层运作）？A. Transport 下载 B・ Network C. Session D. AppI ication3） How many layers does the TCP/IP protocol suite have, compared to the OS I reference model （和0 S I 参考模型相比， TCP/IP协议具有几层）？A. TCP mode Ihas 4,OS I model has 6B. TCP model has 7,OS I model has 8C. TCP model has 4,OS I model has 7D. TCP model has 7,OS I model has 44） 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 etBIOS、RPC和TLI功能的一个正式的会话层）。

A. True B. False5） What is the function of RPCs （RPC 的功能是什么）？A. To move files from remote PCs to a local PCB. To make remote function calls transparent, so they appear to be localC. To initialize a program on a remote PCD. To send a procedure that is local to a remote node for processingelsewhere6） What does RPC stand for （RPC 代表什么）？A. Remote personal computerB. Reserved-programming cal IC. Routed-procedure cal ID. Remote-procedure cal I7） What OS I reference model layer do sockets f unct i on at （套 接字在0 S I参考模型的哪层运 作）？A. AppIication B. Presentation C. SessionD. Transport E. Network F. Data I ink G. PhysicaI8） What function do sockets perform （套接字的功能是什么）？A. They make remote functions appear local, transparent to the userB. They transfer files to and from remote nodesC. They make the transport layer independentD. They allow multiple appIicat ions to share the same connect i on to the network9） What is WinSock （什么是Wi n S o c k ）?A. A version of sockets for the Microsoft Windows pIatformB. Sockets on BSD UNIXC. A session layer API commonly considered to be its own protocolD. A network layer service for Microsoft Wi n d o w s10） What does TLI do （TLI 的作用是什么）？A. It makes remote functions appear local, transparent to the userB. It transfers files to and from remote nodesC. It makes the transport layer independentD. It a 11ows multiple appIi cat i ons to share the same connect i on to the network11） What OS I layer does NetBI OS funct i on at （NetBIOS 在 0 S I哪一层运作）？A. Application B. Presentation C. SessionD. TransportE. Network F. Data Link G. Physical12） Which protocols can NetBIOS bind to? （Select al I 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. NetBEUI13） What layers do not exist in the TCP/IP model that are in the OS I model （哪层不在T C P / I P模型中，但它在0 S I模型 +）?A. AppIication, presentation, and networkB. Presentation, session, and data IinkC. Session, network, and physicaID. Presentation, data Iink, and physicaI14） 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 portB. An API that makes the transport layer independentC. An API that al lows multiple applicat ions to share a network connect i onD. A funct ion that makes remote procedures appear to be local15） What is a port （什么是端口）？A. An API that makes the transport layer independentB. An API that a 11ows multiple appIicat ions to share a network connect i onC. A funct i on that makes remote procedures appear to be localD. The point where upper-layer processes access transport layer services16) Which of the fol lowing 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 transferB. Connection-oriented virtual circuitC. Buffered transferD. ResequencingE. MultiplexingF. Eff i c i ent, fu11-dupI ex transm i ss i onG. Flow control17) What is UDP (什么是 U DP)?A. An API that makes the transport layer independentB. A connectionless, unreliable transport protocolC. An API that al lows multiple applicat ions to share a network connect i onD. A function that makes remote procedures appear to be local18） What is IP （什么是 IP）?A. It is the transportmechan i sm forupper layer servicesB. It is the session layer API for making the transport layer independentC. It is the network layer protocol that moves data from one node to anotherD. It is the physical layer protocoI for Internet connections19） What is ICMP （什么是 I CMP）?A. It is a network layer protocol that handles control messagesB. It is a network layer protocol that resolves addressesC. It is a session layer API that makes remote procedures transparent to a userD. It is a transport layer function for unreliable transport20） Ping sends an ICMP echo command to an IP address in order to determine whether anetwork connection exists to that node （Ping向一个I P地址发送了一个I CMP回送命令，目的是确定是 否存在到那个节点的网络连接）？A. True B. False21） Which of the fol lowing best describes TCP/IP （下面的哪 句话最准确地说明了 TCP/IP）?A. A static protocolC. A col lection。