What is the effect of turning on all available downstream carrier tones in a DMT DSL transmissionsystems？（） Downstream RS error correction effectiveness is reduced。 The downstream line rate and throughput remains unchanged， but FEC efficiency is reduced。 The upstream DSL bandwidth is reduced， since less carriers become available for upstream traffic。 The downstream DSL bandwidth is increased。
左翼文学的目的是：（） 自我完善。 把现存社会改造推翻，夺取政权。 维护专制。 以上说法都正确。
某股票拟进行股票分红，方案为每10股送5股，个人所得税率为20%，该股票股权登记日的收盘价为9元，则该股票的除权价应该是（）。 6元。 5元。 7元。 6.43元。
阐发研究的注意事项
Which two of these are characteristics of the 802.1Q protocol?（） it is a layer 2 messaging protocol which maintains vlan configurations across network.。 it includes an 8-bit field which specifies the priority of a frame.。 it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.。 it modifies the 802.3 frame header,and thus requires that the FCS be recomputed.。 it is a trunking protocol capable of carring untagged frames.。
What are three advantages of the Cisco Integrated Services Pouter product family？ （Choose three.） （）
