单项选择题 以太网交换机根据(62)转发数据包。访问交换机的方式有多种，配置一台新的交换机时可以(63)进行访问。在键入交换机命令时可使用缩写形式，在Switch#模式下，如果键入“con”，则表示(64)。

多项选择题 社会工作行政系统的组织机构改革包括（）等几方面内容。

单项选择题 In the strength of the carrier signal is varied to represent binary 1 or 0. (72) is a system that can map a name to an address and conversely an address to an name. (73) is a three-way handshaking authentication protocol that it's packets are encapsulated in the point-to-point protocol (74) is an approach that enables an ATM Switch to behave like a LAN switch. (75) is an guided media which is made of glass or plastic and transmits signals in the form. of light.A．ASKB．PSKC．FSKD．FDM