单项选择题
根据下图，哪个选项描述了DLCI 17？（）
A.DLCI 17描述了R2和R3之间的ISDN线路
B.DLCI 17描述了一条在R2上的PVC 不能用在R3和R1上
C.DLCI 17是R2使用的二层地址，用来描述一条到R3的PVC
D.DlDLCI 17描述了一条从R2 R3到服务提供商拨号网络
相关考题
-
多项选择题
Why does the data communication industry use the layered OSI reference model (Choose two.)（）。
A.It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
B.It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.
C.It supports theevolution of multiple competing standards, and thus provides business opportunities for equipment manufacturers.
D.It encourages industry standardization by defining what functions occur at each layer of the model.
E.It provides a means by which changes in functionality in one layer require changes in other layers. -
单项选择题
You and a co-worker have established wireless communication directly between your wireless laptops. What type of wireless topology has been created（）。
A.BSS
B.ESS
C.IBSS
D.SSID -
单项选择题
When upgrading the IOS image, the network administrator receives the exhibited error message. What could be the cause of this error（）。
A.The new IOS image is too large for the router flash memory.
B.The TFTP server is unreachable from the router.
C.The new IOS image is not correct for this router platform.
D.The IOS image on the TFTP server is corrupt.
E.There is not enough disk space on the TFTP server for the IOS image.
