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CCNA 4 - Final Exam Answers

1 Which of the following describes the roles of devices in a WAN? (Choose three.) *** A CSU/DSU terminates a digital local loop. A modem terminates a digital local loop. A CSU/DSU terminates an analog local loop. *** A modem terminates an analog local loop. *** A router is commonly considered a DTE device. A router is commonly considered a DCE device. www.p4s-ccna.blogspot.com 2 What value in the address field of a Frame Relay header identifies the destination of the frame? CIR DE *** DLCI ISDN FRAD PVC 3 The serial PPP link between the Left and Right routers is configured as shown in the diagram. Which configuration issue explains why the link is unable to establish a PPP session? The IP addresses must be on different subnets. *** The usernames are misconfigured. The passwords must be different for the CHAP authentication. The clock rate must be 56000. The clock rate is configured on the wrong end of the link. Interface serial 0/0 on Left must connect to interface serial 0/1 on Right.