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发布时间: 2021-12-14 09:13
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Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a (1)group is referred to as multicasting. Multicasting done (2)the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the (3)multicast group recognize the multicast address and (4)the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the (5)nature of a LAN: A transmission from any one station is received by all other station on the LAN.
空白(2)应选( )。
本题解析:
一般来说,一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址,这种地址叫IP组播地址,把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的,使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时,属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本,这是因为局域网是广播通信这个性质:即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。
Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a (1)group is referred to as multicasting. Multicasting done (2)the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the (3)multicast group recognize the multicast address and (4)the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the (5)nature of a LAN: A transmission from any one station is received by all other station on the LAN.
空白(4)应选( )。
本题解析:
一般来说,一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址,这种地址叫IP组播地址,把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的,使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时,属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本,这是因为局域网是广播通信这个性质:即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。
Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a (1)group is referred to as multicasting. Multicasting done (2)the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the (3)multicast group recognize the multicast address and (4)the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the (5)nature of a LAN: A transmission from any one station is received by all other station on the LAN.
空白(5)应选( )。
本题解析:
一般来说,一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址,这种地址叫IP组播地址,把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的,使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时,属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本,这是因为局域网是广播通信这个性质:即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。
Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a (1)group is referred to as multicasting. Multicasting done (2)the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the (3)multicast group recognize the multicast address and (4)the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the (5)nature of a LAN: A transmission from any one station is received by all other station on the LAN.
空白(3)应选( )。
本题解析:
一般来说,一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址,这种地址叫IP组播地址,把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的,使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时,属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本,这是因为局域网是广播通信这个性质:即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。
Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a (1)group is referred to as multicasting. Multicasting done (2)the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the (3)multicast group recognize the multicast address and (4)the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the (5)nature of a LAN: A transmission from any one station is received by all other station on the LAN.
空白(1)应选( )。
本题解析:
一般来说,一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址,这种地址叫IP组播地址,把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的,使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时,属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本,这是因为局域网是广播通信这个性质:即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。
MVC(Model——View——Controller,模型——视图——控制器)是一种广泛流行的软件设计模式,也是 J2EE 平台上推荐的一种设计模型。其中,( )主要表现用户界面。
本题解析:
MVC 是一种使用 MVC(Model View Controller 模型-视图-控制器)设计创建 Web 应用程序的模式。
? Model(模型)表示应用程序核心(比如数据库记录列表)。
? View(视图)显示数据(数据库记录)。
? Controller(控制器)处理输入(写入数据库记录)。
MVC(Model——View——Controller,模型——视图——控制器)是一种广泛流行的软件设计模式,也是 J2EE 平台上推荐的一种设计模型。其中,( )用来描述核心业务逻辑。
本题解析:
MVC 是一种使用 MVC(Model View Controller 模型-视图-控制器)设计创建 Web 应用程序的模式。
? Model(模型)表示应用程序核心(比如数据库记录列表)。
? View(视图)显示数据(数据库记录)。
? Controller(控制器)处理输入(写入数据库记录)。
信息系统的概念结构如下图所示,正确的名称顺序是( )。
本题解析:
信息系统从概念上来看是由信息源、信息处理器、信息用户和信息管理者4部分组成,在信息系统建设中,为了使开发出来的目标系统能满足实际需要,在着手编程之前应认真考虑以下问题:
(1)系统所要求解决的问题是什么?
(2)为解决该问题,系统应干些什么?
(3)系统应该怎样去干?
企业 IT 战略规划不仅要符合企业发展的长期目标,而且其战略规划的范围控制应该( )
本题解析:
企业IT战略规划进行战略性思考的时候可以从以下几方面考虑:(1)IT战略规划目标的制定要具有战略性,确立与企业战略目标相一致的企业IT战略规划目标,并且以支撑和推动企业战略目标的实现作为价值核心。(2)IT战略规划要体现企业核心竞争力要求,规划的范围控制要紧密围绕如何提升企业的核心竞争力来进行,切忌面面俱到的无范围控制。 (3)IT战略规划目标的制定要具有较强的业务结合性,深入分析和结合企业不同时期的发展要求,将建设目标分解为合理可行的阶段性目标,并最终转化为企业业务目标的组成部分。 (4)IT战略规划对信息技术的规划必须具有策略性,对信息技术发展的规律和趋势要具有敏锐的洞察力,在信息化规划时就要考虑到目前以及未来发展的适应性问题。 (5)IT战略规划对成本的投资分析要有战术性,既要考虑到总成本投资韵最优,又要结合企业建设的不同阶段做出科学合理的投资成本比例分析,为企业获得较低的投舒散益比。(6)IT战略规划要对资源的分配和切入时机进行充分的可行性评估。
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