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适时驱动（Real－Time）
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A real-time operating system.（RTOS）is an operating system intended to serve（ ）application process data as it comes in,typically without buffering delays.A key（请作答此空）of a RTOS is the level of its consistency concerning the amount of time it takes to accept and complete an application’s task;the variability is jitter.A hard real-time operating system has（ ）jitter than a soft real-time operating system.The chief design goal is not high throughput,but rather a guarantee of a soft or hard performance category.A RTOS has an advanced algorithm for scheduling.（ ）flexibility enables a wider,computer-system orchestration of process priorities,but a real-time OS is more frequently dedicated to a narrow set of applications.Key factors in a real-time OS are minimal（ ）latency and minimal thread switching latency.A.characteristic
B.programming
C.structure
D.computer
考题
The Cisco SDM will create a QoS policy that provides services to two types of traffic. Which two statements indicate the default QoS parameters that are created by SDM？（）A、 Business-critical traffic will be sorted into two QoS classes.B、 Real-time traffic will be sorted into one QoS class.C、 Voice traffic will be considered real-time traffic while call signaling will be considered business-critical.D、 All traffic except real-time will be considered best-effort.E、 Routing， management， and transactional traffic will be considered business-critical.F、 Voice and call signaling traffic will be considered real-time.
考题
Which sar option generates real-time disk I/O statistics?（）A、 sar -q B、 sar -P C、 sar -d D、 sar -D
考题
Which CLI command displays error statistics for an interface in real-time?（）A、monitor trafficB、show interfacesC、monitor interfaceD、show interfaces extensive
考题
Which interface provides the ability to see changes in real-time as they occur ？ （）A、 ConcurrentMapB、 java.util.AbstractMapC、 ObservableMapD、 InvocableMap
考题
When configuring QoS on a wireless controller， the per-user， real-time bandwidth contract isenforced for which of the following protocols？（）A、IPXB、IPC、UDPD、TCP
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Which QoS mechanism can help classify different kinds of Citrix traffic print job versus real-time terminalcontrol？（）A、qos-groupB、DSCPC、LFID、NBAR
考题
What are three functions of the Cisco wireless LAN controller， which is being used in the Company Centralized WLAN solution network？ （）A、 Authentication B、 MobilityC、 Security managementD、 Transmission of beacon framesE、 Real-time portions of MAC managementF、 Real-time aspects of the 802.11 prtocol managementG、 SNMP collection
考题
Which CLI command displays packet and byte counts for an interface in real-time?（）A、monitor trafficB、show interfacesC、monitor interfaceD、show traffic counts
考题
多选题Which two statements are true about the application of QoS in a converged network？（）Aend-to-end network delay times that exceed 50 ms for real-time traffic are considered unacceptableBend-to-end network delay times that exceed 250 ms for real-time traffic are considered unacceptableCend-to-end network delay is not a factor as long as the delay is consistentDsome packet loss can be corrected by codec algorithmsERSVP handles voice packet retransmissionFfragmentation is a result of packet loss
考题
判断题自律机具有接收调度中心的列车运行计划、适时生成进路序列，并根据计划指示、列车位置等条件自动触发驱动联锁系统执行的功能。A
对B
错
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