1) What were the two challenges of creating a network model (Select two) (创建网络模型所遇到的两个挑战是什么(选择2个) )？ A. interconnectivity B. interaction
C. internetworking D. interoperability
A，D。互通性和互操作性创建网络模型的挑战。
2) The Advanced Research Projects Agency created what network(高级研究计划局( A R PA ) 创建了什么网络)？ A. Ethernet B. FDDI C. ARPANET D. Token Ring
C。A R PA N E T由D A R PA项目创建。
3) What does OSI stand for (OSI代表什么)？ A. Organization for Standards Institute B. Organization for Internet Standards C. Open Standards Institute
D. Open Systems Interconnection D。O S I代表开放系统互连。
4) What are the layers of the OSI reference model, in order (OSI参考模型有哪些层，按顺序 回答)？
A. application, transport, network, physical
B. application, presentation, session, network, transport, data link, physical
C. application, presentation, session, transport, network, data link, physical
D. application, session, transport, physical
5) What is the term for wrapping a data unit with a header and passing it to the next protocol
(用报头包装一个数据信元并传递到下一个协议，代表这个过程的术语是什么)？ A. Windowing
B. Encapsulation C. Wrapping D. Heading
6) Which of the following is not defined at the physical layer of the OSI reference model (在
O S I参考模型的物理层中没有定义下面的哪一个)？
A. hardware addresses
B. bitstream transmission C. voltage levels
D. physical interface
7) Which standards institute created the 802 series of physical/data link layer standards (哪个标准协会创建了物理/数据链路层标准的8 0 2系列)？ A. ANSI B. DIX C. ITU-T D. IEEE
8) Who created Ethernet (谁创建了E t h e r n e t )？ A. ANSI B. DIX C. ITU-T D. IEEE
9) What is the function of CSMA/CD (CSMA/CD的功能是什么)？ A. It passes a token around a star topology
B. Nodes access the network and retransmit if they detect a collision C. Nodes connect to a dual ring of fiber-optics and use a token-passing scheme
D. Nodes break the frames into tiny cells and forward them through a cell-switching network.
10) What is a backoff algorithm? (什么是补偿算法)？ A. It is the fault tolerance calculation for FDDI
B. It is a routing calculation for determining the best route
C. It is the notification that a serious error has occurred on the network D. It is the duration calculation to delay retransmission after a collision, before
retransmitting in Ethernet.
11) IBM’s Token Ring specification is nearly identical and compatible with IEEE’s 802.5
specification( IBM的令牌环网规范几乎和I E E E的8 0 2 . 5规范一样而且兼容)。 A. True B. False
12) What is beaconing (什么是信标)？
A. It is the fault tolerance calculation for FDDI
B. It is a routing calculation for determining the best route
C. It is the notification that a serious error has occurred on the network D. It is the duration calculation to delay retransmission after a collision, before
retransmitting in Ethernet
13) What two types of frames are found on a Token Ring network (在令牌环网中可以找到
哪两种类型的帧)？ A. Token
B. Frame check sequence C. Data D. Address
14) The FDDI specification includes which layers of the OSI reference model (FDDI规范包
含O S I参考模型的哪层)？ A. Physical and network B. Physical and transport
C. Physical and MAC sublayer of data link D. Physical and data link
15) What is RS-232 (什么是R S - 2 3 2 )？ A. A standard serial port interface B. A high-speed serial interface C. An ISDN interface D. An ATM switch
16) What is the maximum data transmission rate for HSSI (什么是H S S I的最大数据传输速 率)？
A. 64 Kbps B. 256 Kbps C. 100 Mbps D. 52 Mbps
17) What does the hierarchical network layer address provide (层次式网络层地址提供了什 么)？
A. The hardware address
B. The node address and the hardware address C. The network address and the node address
D. The network address mapped to the hardware address 18) What qualities match TCP (TCP具有哪些特点)？ A. connectionless, reliable
B. connection-oriented, reliable C. connectionless, unreliable
D. connection-oriented, unreliable
19) What layer of the OSI reference model specifies data formats, such as encryption (OSI参
考模型的哪层规定了数据格式。例如加密)？ A. application B. presentation B. session D. transport E. network
F. data link G. physical
20) What is out-of-band management (什么是带外管理)？
A. It is the ability to manage a switch or hub from a networked workstation B. It is the addition of a network management module to a hub C. It is the fault tolerance feature of the dual ring FDDI creating a single ring
D. It is the ability to manage a device using a connection other than the network.
21) Interoperability means (互操作性的含义)： A. Transfer of data between systems
B. Ability to make data understandable by machines that use different operating systems,
hardware or languages.
C. Agreement between two equipment vendors for processing data D. Ability of LAN to communicate with WA N
22) OSI is what kind of standard (OSI是何种类型的标准)？
A. a standard created by major telecommunications service providers B. a de facto standard C. a de jure standard
D. a standard created by major equipment manufacturers
23) The layered approach of the OSI results in (OSI的分层方法的结果是)： A. Increased development costs for a specific vendor product B. Increased marketability for a specific vendor product C. A hierarchical tool for network architecture D. All of the above E. B & C only F. A & C only
24) Which of the following statements is true in general when an application at the source
wishes to send data to an application at the destination address (当源端的一个应用程序希望发送
数据到目的地址的另一个应用程序时，下面的哪些陈述一般是正确的)？
A. The lower layer at destination adds its own header information to the data it receives from the higher layer
B. The lower layer at source adds its own header information to the data it receives from the higher layer
C. The lower layer at destination strips header information from the data added by the higher layer
D. The higher layer at source strips header information added to the data by the lower layer
25) In the OSI model, encapsulation of the data may occur at (在O S I模型中，数据的封装发 生在)：
A. Layer 7 of the source
B. Layer 1 of the destination C. Layer 7 of the destination D. All layers at source E. Layer 1 of the source
26) The session layer functionality in the OSI model is usually implemented (OSI模型中的 会话层功能通常如何实现)： A. At user premises B. In hardware C. In software
D. In hardware and software
27) At the physical layer in the OSI model the data is broken into (在O S I模型中的物理层 中，数据分解为)： A. cells
B. fragments C. bits D. packets
28) Collision in a CSMA/CD network is said to occur when (CSMA/CD网络中的冲突会在 什么时候发生)：
A. A node listens to the network and hears nothing B. A node receives a message from the network
C. Two nodes hear nothing and then transmit data simultaneously D. A node on the network has physical failure
29) A broadcast system means (广播系统的含义是)：
A. Only few nodes on the network see the data meant for these nodes B. All nodes on the network see all the data frames C. Network informs all the nodes of a network failure D. None of the above
30) Which statements are true of a preamble in the IEEE 802.3 frame (对IEEE 802.3帧前导
符的陈述哪一个是正确的)？
A. It is an indication that a node is receiving a new frame B. It contains all zeroes C. It contains all ones
D. It contains alternating zeros and ones E. A and B only F. A and D only G. A and C only