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單項選擇題What physical characteristic does a retinal scan biometric device measure?視網(wǎng)膜掃描設備檢測哪些人體物理特性？（）

A. The pattern of light receptors at the back of the eye眼底光受體組織的圖案
B. The pattern of blood vessels at the back of the eye眼底血管的圖案
C. The amount of light reaching the retina視網(wǎng)膜受光量
D .The amount of light reflected by the retina視網(wǎng)膜反射光量

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1.單項選擇題Guards are appropriate whenever the function required by the security program involves which of the following?守衛(wèi)合適執(zhí)行安全程序所涉及以下哪一項功能？（）

A. The use of discriminating judgment使用辨別判斷能力的時候
B. The use of physical force使用暴力的時候
C .The operation of access control devices對訪問控制設備操作的時候
D .The need to detect unauthorized access需要能檢測到未授權(quán)訪問的時候

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2.單項選擇題Examples of types of physical access controls include all EXCEPT which of the following? 以下哪一個選項不屬于典型的物理訪問控制手段？（）

A.passwords密碼
B.guards守衛(wèi)
C.locks鎖
D.badges徽章

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3.單項選擇題Under what conditions would the use of a Class C fire extinguisher be preferable to a Class A extinguisher? C類火災滅火器比A類滅火器更適用于以下哪一種情況？（）

A .When the fire involves paper products當火災和紙制品有關時
B .When the fire is caused by flammable products當火災由易燃物造成
C .When the fire involves electrical equipment當火災和電器設備有關時
D .When the fire is in an enclosed area當火災發(fā)生在一個封閉空間內(nèi)

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4.單項選擇題The most prevalent cause of computer center fires is which of the following計算機中心火災主要的原因是以下哪一項？（）

A.AC equipment 交流電源設備
B.Natural causes 自然原因
C.Electrical distribution systems 配電系統(tǒng)
D.Heating systems 供熱系統(tǒng)

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5.單項選擇題Where parties do not have a shared secret and large quantities of sensitive information must be passed, the most efficient means of transferring information is to use Hybrid Encryption Methods. What does this mean?雙方?jīng)]有共享的密鑰以及大量的敏感信息需要傳輸，最有效的用于信息傳輸?shù)牡姆绞绞鞘褂没旌蟼鬏斝畔⒓用芩惴ā＿@是什么意思？（）

A.Use of software encryption assisted by a hardware encryption accelerator.使用由硬件加密加速器協(xié)助的軟件加密
B.Use of the recipient’s public key for encryption and decryption based on the recipient’s private key.使用接受方的公鑰進行加密以及使用接受者的私鑰既你想那個解密
C.Use of public key encryption to secure a secret key，and message encryption using the secret key.使用公鑰加密來加密秘密會話密鑰，并且使用秘密會話密鑰來加密信息
D.Use of elliptic curve encryption.使用橢圓曲線加密

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