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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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1.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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2.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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3.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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4.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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5.多項(xiàng)選擇題Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme？（）

A.statically map IPV4 address to IPV6 addresses
B.configuration IPv4 tunnels between IPV6 islands
C.use DHCPv6 to map IPV4 addresses to IPV6 addresses
D.use proxying and translation to translate IPV6 packets into IPV4 packets
E.configure IPV6 directly
F.enable dual-stack routing

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