第66題： UDP首部不包括（）字段。
A．目標(biāo)端口
B．序列號(hào)
C．源端口
D．校驗(yàn)和答案解析與討論：www.xiexiliangjiufa.com/st/7818923634.html

第67題： 若某設(shè)備收到目的IP為本地、但MAC地址不匹配的數(shù)據(jù)幀，其他數(shù)據(jù)鏈路層會(huì)（）該數(shù)據(jù)幀。
A．丟棄
B．廣播
C．緩存
D．轉(zhuǎn)發(fā)答案解析與討論：www.xiexiliangjiufa.com/st/7819023634.html

第68題： 在5G網(wǎng)絡(luò)架構(gòu)中，網(wǎng)絡(luò)切片（Network Slicing）的主要優(yōu)勢(shì)是（）。
A．提高用戶入網(wǎng)時(shí)的認(rèn)證速度
B．為不同應(yīng)用提供定制化服務(wù)
C．降低設(shè)備成本
D．?dāng)U大信號(hào)范圍答案解析與討論：www.xiexiliangjiufa.com/st/7819123634.html

第70題： 企業(yè)園區(qū)網(wǎng)絡(luò)設(shè)計(jì)時(shí)，采用“核心-匯聚-接入”分層模型的優(yōu)點(diǎn)是（）。
A．無(wú)單點(diǎn)故障，網(wǎng)絡(luò)冗余性高
B．IP地址統(tǒng)一分配，方便管理
C．易于隔離故障，網(wǎng)絡(luò)穩(wěn)定性高
D．所有流量經(jīng)過(guò)核心層，通信效率高答案解析與討論：www.xiexiliangjiufa.com/st/7819323625.html

第71題： In recent years, the importance of network security has grown significantly due to the increasing number of cyber threats. To protect sensitive information, Organizations are adopting advanced （1）solutions such as end-to-end encryption and multi-factor authentication. One popular cryptographic method is （2）,which ensures that data remains confidential transmission. Additionally,the use of（3）technology is becoming more common to secure communications and prevent unauthorized access to networks. As cyber attacks evolve, it is imperative for businesses to implement robust（4），measures and continuously update their systems to address new vulnerabilities. Moreover, emerging technologies 1ike （5）can help analysts detect anomalies and respond to threats more effectively.
（1）
A．network
B．hardware
C．software
D．cryptographic
（2）
A．blockchain
B．digital signature
C．encryption
D．hashing
（3）
A．blockchain
B．cloud
C．peer-to-peer
D．a(chǎn)uthentication
（4）
A．design
B．Storage
C．performance
D．security
（5）
A．6G
B．virtual reality （VR）
C．a(chǎn)rtificial intelligence （Al）
D．3D printing答案解析與討論：www.xiexiliangjiufa.com/st/781949062.html