第64题： Software-defined networking(SDN)technology is an approachto(64)management that enables dynamic,progranmatically efficient network configuration in order to improve network performance and monitoring,in a manner more akin to(65)computing than to traditional network management. SDN archi tectures decouple network control and forwarding functions,enabling the network control to become directly(66)and the underlying infrastructure to be abstracted from applications and network services.SDN was commonly associated with the (67)protocol since the protocol's emergence in 2011. When using an SDN based model for transmitting multimedia traffic,an important aspect to take account is the(68)of Experience(QoE)estimation.To estimate theQoE,first we have to be able to classify the traffic and then,it's recommended that the system can solve critical problems on its own by analyzing the traffic.
(64)A．resource
B．device
C．memory
D．network
(65)A．parallel
B．grid
C．distributed
D．cloud
(66)A．configurable
B．programmable
C．transformable
D．adaptable
(67)A．OpenF1ow
B．OpenVPN
C．OpenNet
D．OpenAI
(68)A．Quality
B．Query
C．Queue
D．Quantity
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第65题： 对IPv4 地址段192.168.10.0/24进行子网划分，要求每个子网至少50个可用IP地址，其主机位数最少需要(69)位，(70)属于所划分子网的网络号。
（69）0A．7
B．5
C．8
D．6
（70）A． 192.168.10.32
B． 192.168.10.0
C． 192.168.10.160
D． 192.168.10.96
答案解析与讨论：www.cnitpm.com/st/577086648.html

第66题： 某网络拓扑如下图所示，局域网用户通过防火墙访问互联网，在防火墙上配置安全策略实现其功能时源地址应为(71)、目的安全区域应为(72)、动作为permit.

（71）A．113.200.2.1/28
B．10.0.1.1/25
C． 10.0.1.1/24
D． 10.0.1.129/25
（72）A．local
B．untrust
C．trust
D．dmz
答案解析与讨论：www.cnitpm.com/st/5770921489.html

第68题： TCP传输60KB带宽，传输1000字节，0.1s延迟，0.02丢包率，则信道利用率为（）
A．2.0%
B．1.6%
C．1.2%
D．0.8%
答案解析与讨论：www.cnitpm.com/st/577115267.html