English FormC ENetwork v40 Chapter 2Word文档下载推荐.docx

1、ObservableDescriptionMax Value1correctness of responseOption 1, Option 3, and Option 5 are correct.1 point for each correct option.0 points if more options are selected than required. 3 2.3.2 Network Protocols 2.4.1 The Benefits of Using a Layered Model 2.4.6 The Sending and Receiving Process Select

2、 the statements that are correct concerning network protocols. （Choose three.）define the structure of layer specific PDUsdictate how to accomplish layer functionsoutline the functions necessary for communications between layerslimit the need for hardware compatibilityrequire layer dependent encapsul

3、ationseliminate standardization among vendors 2.2.4 Network Representations What are two functions of encapsulation? （Choose two.）tracks delay between end devicesenables consistent network paths for communicationallows modification of the original data before transmissionidentifies pieces of data as

4、 part of the same communicationensures that data pieces can be directed to the correct receiving end deviceOption 4 and Option 5 are correct.2 2.4.7 The OSI Model What is a primary function of the trailer information added by the data link layer encapsulation?supports error detectionensures ordered

5、arrival of data provides delivery to correct destinationidentifies the devices on the local networkassists intermediary devices with processing and path selection 2 points for Option 10 points for any other option 2.4.8 Comparing the OSI Model with the TCP/IP Model Which two layers of the OSI model

6、have the same functions as the TCP/IP model Network Access Layer?NetworkTransportPhysicalData LinkSessionOption 3 and Option 4 are correct. 2.3.3 Protocol Suites and Industry Standards What is a PDU?corruption of a frame during transmissiondata reassembled at the destinationretransmitted packets due

7、 to lost communicationa layer specific encapsulation2 points for Option 4 2.1.4 End Devices and their Role on the Network Which characteristic correctly refers to end devices in a network?originate data flow2 points for Option 2 2.1.5 Intermediary Devices and their Role on the Network Refer to the e

8、xhibit. Cell A at IP address 10.0.0.34 has established an IP session with IP Phone 1 at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device Cell A?the destination devicean end devicean intermediate devicea media device 2.2.2 Wide Area Net

9、works Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown?Network A - WANNetwork B - WANNetwork C - LANNetwork B - MANNetwork C - WANNetwork A - LANOption 2, Option 3, and Option 6 are correct.Which three statements best describe a Lo

10、cal Area Network （LAN）?A LAN is usually in a single geographical area.The network is administered by a single organization.The connection between segments in the LAN is usually through a leased connection.The security and access control of the network are controlled by a service provider.A LAN provi

11、des network services and access to applications for users within a common organization.Each end of the network is generally connected to a Telecommunication Service Provider （TSP）.Option 1, Option 2, and Option 5 are correct. 2.3.1 Rules that Govern Communications Refer to the exhibit. Which network

12、ing term describes the data interleaving process represented in the graphic?pipingPDUstreamingmultiplexingencapsulation 2.5.4 Getting the Data to the Right Application What is the primary purpose of Layer 4 port assignment?to identify devices on the local mediato identify the hops between source and

13、 destinationto identify to the intermediary devices the best path through the networkto identify the source and destination end devices that are communicatingto identify the processes or services that are communicating within the end devices2 points for Option 5What device is considered an intermedi

14、ary device?file serverIP phonelaptopprinterswitchRefer to the exhibit. Which term correctly identifies the device type that is included in the area B?sourceendtransferintermediary 2.2.1 Local Area Networks Refer to the exhibit. What type of network is shown?WANMANLANWLAN2 points for Option 3 2.4.5 P

15、rotocol Data Units and Encapsulation Which layer encapsulates the segment into packets?physicaldata linknetworktransport 2.5.3 Getting the Data through the Internetwork What can be identified by examining the network layer header?the destination device on the local mediathe destination host addressthe bits that will be transferred over the mediathe source application or process creating the dataRefer to the exhibit. Which set of devices contains only end devices?A, C, DB, E, G, HC,