Curso Basico De Excel

1 | -------------------------------------------------
Principio del formulario Which three WAN devices can be found in the cloud? (Choose three.) |
| ATM switches |
| core routers |
| CSU/DSU |
| Ethernet switches |
| Frame Relay switches |
| repeaters |
Final del formulario |
2 | -------------------------------------------------
Principio del formulario At which two layersof the OSI model does a WAN operate? (Choose two.) |
| Physical Layer |
| Data Link Layer |
| Network Layer |
| Transport Layer |
| Presentation Layer |
| Application Layer |
Final del formulario |
3 | -------------------------------------------------
Principio del formulario A company needs a WAN connection that is capable of transferring voice, video, and data at a minimumdata rate of 155 Mbps. Which WAN connection is the best choice? |
| X.25 |
| DSL |
| ATM |
| ISDN BRI |
| ISDN PRI |
Final del formulario |
4 | -------------------------------------------------
Principio del formulario What three terms are associated with ISDN PRI? (Choose three.) |
| cell |
| DLCI |
| circuit switching |
| packet switching |
| data bearerchannels |
| time-division multiplexing |
Final del formulario |

5 | -------------------------------------------------
Principio del formulario Which networking device is typically used to concentrate the dial-in and dial-out traffic of multiple users to and from a network? |
| core router |
| access server |
| Frame Relay switch |
| ATM switch |
Final del formulario |
6 |-------------------------------------------------
Principio del formulario Which statement is true about data connectivity between a customer and a service provider? |
| Normally the CSU/DSU is the designated demarcation point for the service provider but not the customer. |
| The segment between the demarcation point and the central office is known as the "last mile." |
| The local loop isthe segment between the CSU/DSU and the serial port on a router. |
| Putting data on the local loop is the responsibility of the DTE. |
Final del formulario |
7 | -------------------------------------------------
Principio del formulario What can cause a reduction in available bandwidth on a cable broadband connection? |
| smaller cells |
| number of subscribers |
| committedinformation rate |
| distance from the central office of the provider |
Final del formulario |
8 | -------------------------------------------------
Principio del formulario Which packet-switched WAN technology offers high-bandwidth connectivity capable of managing data, voice, and video all on the same infrastructure? |
| Time Division Multiplexing (TDM) |
| metro Ethernet |
| IntegratedServices Digital Network (ISDN) |
| Public Switched Telephone Network (PSTN) |
Final del formulario |
9 | -------------------------------------------------
Principio del formulario Which two devices are commonly used as data communications equipment? (Choose two.) |
| modem |
| router |
| CSU/DSU |
| ISDN switch |
| Ethernet switch |
Final del formulario |
10 |-------------------------------------------------
Principio del formulario Which statement is true of the functionality of the layers in the hierarchical network model? |
| The purpose of the access layer is to provide very high bandwidth communications between network devices. |
| Most security screening to prevent unauthorized entry to the network happens at the core layer. |
| Untrustedexternal connections are segmented from the rest of the network at all three levels. |
| The distribution layer aggregates WAN connections at the edge of the campus. |
Final del formulario |

11 | -------------------------------------------------
Principio del formulario Which two features are identified with Frame Relay connections? (Choose two.) |
| 53-byte cells |
| DLCI |
| DSLAM |...