中级网络工程师相同项单选集试卷（一）.doc

试卷第 PAGE 1 页共 NUMPAGES 1 页 中级网络工程师相同项单选集试卷 姓名:_____________ 年级:____________ 学号:______________ 题型 选择题 填空题 解答题 判断题 计算题 附加题 总分 得分 评卷人 得分 1、 In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the(61)between sending the notification and notification arriving at the source, thousands of additional(62)may arrive. In ATM network, a major tool for preventing(63)is(64)control. When a host wants a new virtual(65), it must describe the traffic to be offered and the service expected.（61）是（ ） A.interval B.time C.slot D.delay2、 In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the(61)between sending the notification and notification arriving at the source, thousands of additional(62)may arrive. In ATM network, a major tool for preventing(63)is(64)control. When a host wants a new virtual(65), it must describe the traffic to be offered and the service expected.（62）是（ ） A.packets B.cells C.message D.files3、 In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the(61)between sending the notification and notification arriving at the source, thousands of additional(62)may arrive. In ATM network, a major tool for preventing(63)is(64)control. When a host wants a new virtual(65), it must describe the traffic to be offered and the service expected.（63）是（ ） A.collision B.congestion C.drop D.delay4、 In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In hig