第64題： 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．a(chǎn)daptable
(67)A．OpenF1ow
B．OpenVPN
C．OpenNet
D．OpenAI
(68)A．Quality
B．Query
C．Queue
D．Quantity
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第65題： 對IPv4 地址段192.168.10.0/24進行子網(wǎng)劃分，要求每個子網(wǎng)至少50個可用IP地址，其主機位數(shù)最少需要(69)位，(70)屬于所劃分子網(wǎng)的網(wǎng)絡號。
（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
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第66題： 某網(wǎng)絡拓撲如下圖所示，局域網(wǎng)用戶通過防火墻訪問互聯(lián)網(wǎng)，在防火墻上配置安全策略實現(xiàn)其功能時源地址應為(71)、目的安全區(qū)域應為(72)、動作為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
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第68題： TCP傳輸60KB帶寬，傳輸1000字節(jié)，0.1s延遲，0.02丟包率，則信道利用率為（）
A．2.0%
B．1.6%
C．1.2%
D．0.8%
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