單項選擇題What is the main difference between the information displayed on the dspload and the dsptrkutl screens?()

A.The dspload screen is for all trunks; the dsptrkutl screen is for one trunk
B.The dspload screen shows the expected traffic; the dsptrkutl screen shows actual traffice
C.The information on the dspload screen never changes; the dsptrkutl screen is dynamic
D.The dspload screen shows historical information; the dsptrkutl screen shows current information


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1.單項選擇題In a cable HFC plant, what is a modulator?()

A.Set top box
B.Diplex filter
C.Local head end
D.Fiber node

2.單項選擇題What is the purpose of Dual Ring Interconnect with D C for SDH rings?()

A.Protects signals when a ring switch fails
B.Protects signals when multiple span switches fail
C.Protects pre-emptible traffic from being dropped when a ring switch occurs
D.Protects signals against any combination of link failure in each ring

3.單項選擇題What is the effect of turning on all available downstream carrier tones in a DMT DSL transmissionsystems?()

A.Downstream RS error correction effectiveness is reduced
B.The downstream line rate and throughput remains unchanged, but FEC efficiency is reduced
C.The upstream DSL bandwidth is reduced, since less carriers become available for upstream traffic
D.The downstream DSL bandwidth is increased

4.單項選擇題Which statement is FALSE concerning the interleave depth value?()

A.A higher interleave depth provides more protection from burst of noise on the HFC network
B.Higher interleave depth increase downstream latency
C.Lower interleave depth cause some packet loss on typical HFC networks
D.None ofthe above

5.多項選擇題Which two IOS commands are equivalents for putting a Cisco 7500 OC-12 RPR interface card intowrapped mode? ()

A.shutdown [a b]
B.srp shutdown [a b]
C.srp ips request manual-switched [a b]

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