[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fx74KSBdKk-oyjRCvgKbYuwwJmen_JHDP6NhXkpyF7Us":3},{"id":4,"source":5,"question":6,"options":7,"answer":8,"related":9,"type":29,"origin":60,"createTime":18},113182654,"v1","有如下的 4 个 \u002F24 地址块,试进行最大可能的聚合.(4-22) 212.56.132.0\u002F24 212.56.133.0\u002F24 212.56.134.0\u002F24 212.56.135.0\u002F24",[],[],[10,19,25,30,36,42,48,54],{"id":11,"source":5,"question":12,"options":13,"answer":14,"related":15,"type":16,"origin":17,"createTime":18},113182652,"网络如图 4-88 所示. (1)假定路由器 R₁ 把所有发往网络前缀 123.1.2.16\u002F29 的分组都从接口 4 转发出去. (2)假定路由器 R₁ 要把 H₁ 发往 123.1.2.16\u002F29 的分组从接口 4 转发出去,而把 H₂ 发往 123.1.2.16\u002F29 的分组从接口 3 转发出去. 试问,在上述两种情况下,你都能够给出路由器 R₁ 的转发表吗?转发表只需要给出发往 123.1.2.16\u002F29 的分组应当从哪一个接口转发出去.(4-63) \u003Cimg src=\"https:\u002F\u002Fp.ananas.chaoxing.com\u002Fstar3\u002Forigin\u002F61045f1490c8d79cb936217396ddc8d3.jpg\">",[],[],[],4,null,"2023-12-11T23:23:18+08:00",{"id":20,"source":5,"question":21,"options":22,"answer":23,"related":24,"type":16,"origin":17,"createTime":18},113182653,"在互联网中将 IP 数据报分片传送的数据报在最后的目的主机进行组装.还可以有另一种做法,即数据报片通过一个网络就进行一次组装,试比较这两种方法的优劣.(4-14)",[],[],[],{"id":4,"source":5,"question":6,"options":26,"answer":27,"related":28,"type":29,"origin":17,"createTime":18},[],[],[],7,{"id":31,"source":5,"question":32,"options":33,"answer":34,"related":35,"type":29,"origin":17,"createTime":18},113182657,"设有一分组交换网.若使用虚电路,则每一分组必须有 3 字节的分组首部.而每个网络结点必须为虚电路保留 8 字节的存储空间来识别虚电路.但若使用数据报,则每个分组需有 15 字节的分组首部,而结点就不需要保留转发表的存储空间.设每段链路每传 1 MB 需 0.01 元.购买结点存储器的成本为每字节 0.01 元,而存储器的寿命为 2 年工作时间(每周工作 40 小时).假定一条虚电路的每次平均工作时间为 1000 s,而在此时间内发送 200 分组,每个分组平均要经过 4 段链路.试问采用哪种方案(虚电路或数据报)更为经济?相差多少",[],[],[],{"id":37,"source":5,"question":38,"options":39,"answer":40,"related":41,"type":29,"origin":17,"createTime":18},113182659,"设某路由器建立如下路由表: 前缀匹配 下一跳 192.4.153.0\u002F26 R3 128.96.39.0\u002F25 接口m0 128.96.39.128\u002F25 接口m1 128.96.40.0\u002F25 R2 *(默认) R4 现收到 5 个分组,其目的 IP 地址分别为: (1)128.96.39.8 (2)128.96.40.20 (3)128.96.40.153 (4)192.4.153.12 (5)192.4.153.80 试分别计算其下一跳",[],[],[],{"id":43,"source":5,"question":44,"options":45,"answer":46,"related":47,"type":29,"origin":17,"createTime":18},113182660,"假定网络中的路由器 B 的路由表有如下的项目(这三列分别表示\"目的网络\"、\"距离\"和\"下一跳路由器\") N1 3 A N2 2 C N3 1 - N4 5 G 现在 B 收到从 C 发来的路由信息(这两列分别表示\"目的网络\"和\"距离\"): N1 3 N2 1 N5 3 试求出路由器 B 更新后的路由表(请说明理由)",[],[],[],{"id":49,"source":5,"question":50,"options":51,"answer":52,"related":53,"type":29,"origin":17,"createTime":18},113182662,"已知地址块中的一个地址是 190.87.140.202\u002F29 ,试求这个地址块中的最小地址和最大地址.地址掩码是什么,地址块中共有多少个地址,相当于多少个 C 类地址?(4-32)",[],[],[],{"id":55,"source":5,"question":56,"options":57,"answer":58,"related":59,"type":29,"origin":17,"createTime":18},113182664,"某单位分配到一个地址块 129.250\u002F16.该单位有 4000 台机器,分布在 16 个不同的地点.如选用子网掩码为 255.255.255.0,试给每一个地点分配一个地址块,并算出每个地址块中 IP 地址的最小值和最大值.(4-19)",[],[],[],{"courseName":61,"courseImg":62,"workName":63,"workId":63,"count":64,"courseId":65},"计算机网络","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4289430fb2132164fbf48075f5067504.jpg","",0,"60b640e1a19eb1dea96b0f247d7f9eb4"]