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ADSL是一种宽带接入技术，这种技术使用的传输介质是 ( ) 。
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ADSL是一种基于电话铜线并与话音业务共存的宽带接入技术
ADSL是宽带接入技术中的一种以下宽带上网方式就是指ADSL
超级一线通
小区宽带
网络快车
有线通
ADSL是一种宽带接入技术这种技术使用的传输介质是12
电话线
CATV电缆
基带同轴电缆
无线通信网
HFC是一种宽带接入技术这种技术使用的传输介质是66
电话线
CATV电缆
基带同轴电缆
微波
ADSL是一种宽带接入技术只需在线路两端加装ADSL设备专用的Modem即可实现家庭PC机用户的高速
它利用普通的铜质电话线作为传输介质，成本较低
可在同一条电话线上接听、拨打电话并且同时进行数据传输，两者互不影响
使用的是专线，用户可以始终处于连线(On Lin状态
它的宽带很高，无论是数据的下载还是上传，传输速度至少在1Mbit/s以上
下列关于ADSL技术的叙述中哪些是正确的 Ⅰ．它是在普通电话线上的一种新的高速宽带技术 Ⅱ．它为
仅Ⅰ和Ⅱ
仅Ⅱ和Ⅲ
仅Ⅰ和Ⅲ
全部
HFC是一种宽带接入技术这种技术使用的传输介质是
电话线
CATV电缆
基带同轴电缆
微波
ADSL非对称数字环路业务是宽带接入技术中的一种接入ADSL的铜线传输距离可达11KM它利用现有的电
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ADSL是一种宽带接入技术这种技术使用的传输介质是______
电话线
CATV电缆
基带同轴电缆
无线通信网例题分析
ADSL技术主要解决的问题是______
宽带接入
多媒体综合网络
宽带交换
宽带传输
ADSL是一种宽带接入技术这种技术使用的传输介质是
电话线
CATV电缆
基带同轴电缆
无线通信网
LMDS是一种双向无线宽带接入技术采用微波传输技术
下列关于ADSL技术的叙述中是正确的Ⅰ．它是在普通电话线上的一种新的高速宽带技术Ⅱ．它为用户提供上下
仅Ⅰ和Ⅱ
仅Ⅱ和Ⅲ
仅Ⅰ和Ⅲ
全部
ADSL非对称数字环路业务是宽带接入技术中的一种接入ADSL的铜线传输距离可达11KM它利用现有的电
2
3
4
5
ADSL是一种宽带接入技术只需在线路两端加装ADSL设备专用的Modem即可实现家庭PC机用户的高速
它利用普通的铜质电话线作为传输介质，成本较低
可在同一条电话线上接听、拨打电话并且同时进行数据传输，两者互不影响
使用的是专线，用户可以始终处于连线(On Line)状态
它的宽带很高，无论是数据的下载还是上传，传输速度至少在1Mbit/s以上
是一种非对称宽带接入方式这种传输方式非常符合Internet视频点播等业务的特点
HDSL
ADSL
SDSL
ISDN
ADSL是一种宽带接入技术只需在线路两端加装ADSL设备专用的Modem即可实现家庭PC机用户的高速
它利用普通铜质电话线作为传输介质，成本较低
可在同一条电话线上接听、拨打电话并且同时进行数据传输，两者互不影响
使用的是专线，用户可能始终处于连线（online）状态
它的上行传输速率通常大于下行传输速率
下列关于ADSL技术的叙述中哪些是正确的Ⅰ.它是在普通电话线上的一种心得高速宽带技术Ⅱ.它为用户提供
仅Ⅰ和Ⅱ
仅Ⅱ和Ⅲ
仅Ⅰ和Ⅲ
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Observe that for the programmeras for chef the urgency of the patron顾客may govern the scheduled completion of the taskbut it cannot govern the actual completion.An omelette煎鸡蛋promised in two minutesmay appear to be progressing nicely.But when it has not set in two minutesthe customer has two choices-waits or eats it raw.Software customers have had choices. Now I do not think software have less inherent courage and firmness than chefsnor than other engineering managers.But false to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very to make a vigorousplausibleand job risking defense of an estimate that is derived by no quantitative methodsupported by little dataand certified chiefly by the hunches of the managers. Clearly two solutions are needed.We need to develop and publicize productivity figuresbug-incidence figuresestimating rulesand so on.The whole profession can only profit from such data.Until estimating is on a sounder basisindividual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates. Observe that for the programmeras for chef the urgency of the patron顾客may govern the scheduled completion of the taskbut it cannot govern the actual completion.An omelette煎鸡蛋promised in two minutesmay appear to be progressing nicely.But when it has not set in two minutesthe customer has two choices-waits or eats it raw.Software customers have had choices. Now I do not think software have less inherent courage and firmness than chefsnor than other engineering managers.But false to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very to make a vigorousplausibleand job risking defense of an estimate that is derived by no quantitative methodsupported by little dataand certified chiefly by the hunches of the managers. Clearly two solutions are needed.We need to develop and publicize productivity figuresbug-incidence figuresestimating rulesand so on.The whole profession can only profit from such data.Until estimating is on a sounder basisindividual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
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Observe that for the programmeras for chef the urgency of the patron顾客may govern the scheduled completion of the taskbut it cannot govern the actual completion.An omelette煎鸡蛋promised in two minutesmay appear to be progressing nicely.But when it has not set in two minutesthe customer has two choices-waits or eats it raw.Software customers have had choices. Now I do not think software have less inherent courage and firmness than chefsnor than other engineering managers.But false to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very to make a vigorousplausibleand job risking defense of an estimate that is derived by no quantitative methodsupported by little dataand certified chiefly by the hunches of the managers. Clearly two solutions are needed.We need to develop and publicize productivity figuresbug-incidence figuresestimating rulesand so on.The whole profession can only profit from such data.Until estimating is on a sounder basisindividual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates. Observe that for the programmeras for chef the urgency of the patron顾客may govern the scheduled completion of the taskbut it cannot govern the actual completion.An omelette煎鸡蛋promised in two minutesmay appear to be progressing nicely.But when it has not set in two minutesthe customer has two choices-waits or eats it raw.Software customers have had choices. Now I do not think software have less inherent courage and firmness than chefsnor than other engineering managers.But false to match the patron’s desired date is much more common in our discipline than elsewhere in engineering.It is very to make a vigorousplausibleand job risking defense of an estimate that is derived by no quantitative methodsupported by little dataand certified chiefly by the hunches of the managers. Clearly two solutions are needed.We need to develop and publicize productivity figuresbug-incidence figuresestimating rulesand so on.The whole profession can only profit from such data.Until estimating is on a sounder basisindividual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
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