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單項(xiàng)選擇題 The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?（）

A.The Gallant router has the wrong LMI type configured
B.Inverse ARP is providing the wrong PVC information to the Gallant router
C.The S3 interface of the Steele router has been configured with the frame-relay encapsulation ietf command
D.The frame-relay map statement in the Attalla router for the PVC to Steele is not correct
E.The IP address on the serial interface of the Attalla router is configured incorrectly

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1.單項(xiàng)選擇題How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the subinterface B
B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C.Configure many sub-interfaces on the same subnet
D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

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2.多項(xiàng)選擇題Which of the following are types of flow control？（）

A. buffering
B. cut-through
C. windowing
D. congestion avoidance
E. load balancing

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3.多項(xiàng)選擇題Which of the following describes the roles of devices in a WAN? （）

A.A CSU/DSU terminates a digital local loop
B.A modem terminates a digital local loop
C.A CSU/DSU terminates an analog local loop
D.A modem terminates an analog local loop
E.A router is commonly considered a DTE device
F.A router is commonly considered a DCE device

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4.多項(xiàng)選擇題Which of the following IP addresses fall into the CIDR block of 115.64.4.0/22？（）

A. 115.64.8.32
B. 115.64.7.64
C. 115.64.6.255
D. 115.64.3.255
E. 115.64.5.128
F. 115.64.12.128

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5.多項(xiàng)選擇題Which of the following are key characteristics of PPP? （）

A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction

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