CCNA Quiz Chapter 7 Discovery 3

1. What three parameters are defined by WAN standards?

>> flow control >> encapsulation type >> physical addressing

1. Which two layers of the OSI model describe WAN standards?

>> Physical >> Data Link

1. What are two characteristics of a CSU/ DSU?

>> used for digital transmission >> often integrated into a router’s interface card

1. Drag the WAN connection term on the left to its correct definition on the right

>>           SVC
virtual circuit that is dynamically established between two points when a router requests a transmissionCircuit switching
Established a connection between end nodes before forwarding data and ensures dedicated bandwidth through the length of transmissionPVC
Virtual circuit that provides a permanent path to forward data between two pointsPacket switching
Packets from multiple organizations are switched over the same links

1. What two statements describe the Cisco implementation of High-Level Data Link Control protocol?

>> is a data link layer protocol >> supports multiple protocols on a single link

1. What two services allow the router to map data link layer addresses to network layer addresses in a Frame Relay network?

>> Inverse ARP >>LMI status messages

1. What is used to identify a destination for a frame in a Frame Relay network?

>> DLCI

1. Which three statements are true regarding LCP?

>> it is responsible for negotiating link establishment >> it terminates the link upon user request or the expiration of an inactivity timer >> it can test the link to determine if link quality is sufficient to bring up the link

1. Refer to the exhibit. Which command must be added to router RTR_B to allow router RTR_A to authenticate using CHAP?

>> RTR_B (config)#username RTR_A password fortress

1. What are two features of the CHAP protocol?

>> exchanges a random challenge number during the session to verify identity >> disconnects the PPP session if authentication fails