问题
填空题
基于对网络互联要解决的基本问题的分析，网络互联的功能可以分为两类：基本功能和 ______。
答案
参考答案：扩展功能
解析： 基本功能指网络互联必需的功能，包括不同网络之间传送数据时的寻址与路由功能选择。扩展功能是指各种互联的网络提供不同的服务类型时所需的功能，包括协议转换、分组长度变换、分组重新排序及差错检测。
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基于对网络互联要解决的基本问题的分析，网络互联的功能可以分为两类：基本功能和 ______。
参考答案：扩展功能
解析： 基本功能指网络互联必需的功能，包括不同网络之间传送数据时的寻址与路由功能选择。扩展功能是指各种互联的网络提供不同的服务类型时所需的功能，包括协议转换、分组长度变换、分组重新排序及差错检测。
| 根据短文完成下列所缺的内容。 |
| Betty and Henry are the parents of Sally, Linda and Tom. Linda is single (单身的). Sally is married (已婚的). Her husband's name is Jack. Sally and Jack are the parents of Jimmy and Sarah. Jimmy is their son, and Sarah is their daughter. Tom is also married. His wife's name is Patty. Patty and Tom are the parents of Julie and Kevin. Julie is their daughter, and Kevin is their son. Jimmy, Sarah, Julie and Kevin are cousins. They are also the grandchildren of Betty and Henry. |
1. A " family tree " is _____. |