關於認證CCNA希望高手解答都是英文第二章18提(9~18)

9 Which of the following are data link layer encapsulation details? (Choose two.) ( )A header and trailer are added. ( )Data is converted into packets. ( )Packets are packaged into frames. ( )Frames are divided into segments. ( )Packets are changed into bits for Internet travel. 10 Which three features... show more 9 Which of the following are data link layer encapsulation details? (Choose two.)

( )A header and trailer are added.
( )Data is converted into packets.
( )Packets are packaged into frames.
( )Frames are divided into segments.
( )Packets are changed into bits for Internet travel.






10 Which three features apply to LAN connections? (Choose three.)

( )operate using serial interfaces
( )make network connection using a hub
( )limited to operation over small geographic areas
( )provide part-time connectivity to remote services
( )typically operate under local administrative control
( )provide lower bandwidth services compared to WANs





11 Which of the following are ways that bandwidth is commonly measured? (Choose three.)

( )GHzps
( )kbps
( )Mbps
( )Nbps
( )MHzps
( )Gbps





12 Which of the following are layers of the TCP/IP model? (Choose three.)

( )Application
( )Physical
( )Internet
( )Network Access
( )Presentation





13 Which best describes the function of the physical layer?

( )Defines the electrical and functional specifications for the link between end systems.
( )Provides reliable transit of data across a physical link.
( )Provides connectivity and path selection between two end systems.
( )Concerned with physical addressing, network topology and media access.





14 Which term describes the process of adding headers to data as it moves down OSI layers?

( )division
( )encoding
( )separation
( )segmentation
( )encapsulation





15 The central hub has malfunctioned in the network. As a result, the entire network is down. Which type of physical network topology is implemented?

( )bus
( )star
( )ring
( )mesh





16 Refer to the exhibit. Which column shows the correct sequence of OSI model layers?

( )A

( )B

( )C

( )D
Update: 17 Which two features apply to WAN connections? (Choose two.)
Update 2: ( )operate using serial interfaces
( )make network connection using a hub
( )limited to operation over small geographic areas
( )typically operate under local administrative control
( )provide lower bandwidth services compared to LANs
Update 3: 18 Refer to the exhibit. Identify the devices labeled A, B, C, and D in the network physical documentation.
Update 4: ( )A=bridge, B=switch, C=router, D=hub
( )A=bridge, B=hub, C=router, D=switch
( )A=bridge, B=router, C=hub, D=switch
( )A=hub, B=bridge, C=router, D=switch
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