1、SM2算法是國家密碼管理局于2010年12月17日發(fā)布的橢圓曲線公鑰密碼算法，在我們國家商用密碼體系中被用來替換（  ）算法。
A. DES
B. MD5
C. RSA
D. IDEA

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2、以下關(guān)于網(wǎng)絡(luò)流量監(jiān)控的敘述中,不正確的是（  ）。
A.網(wǎng)絡(luò)流量監(jiān)控分析的基礎(chǔ)是協(xié)議行為解析技術(shù)
B.數(shù)據(jù)采集探針是專門用于獲取網(wǎng)絡(luò)鏈路流量數(shù)據(jù)的硬件設(shè)備
C.流量監(jiān)控能夠有效實(shí)現(xiàn)對敏感數(shù)據(jù)的過濾
D.流量監(jiān)測中所監(jiān)測的流量通常采集自主機(jī)節(jié)點(diǎn)、服務(wù)器、路由器接口、鏈路和路徑等

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3、 （1）is the science of hiding information. Whereas the goal of cryptography is to make data unreadable by a third party. the goal of steganography is to hide the data from a third party. In this article, I will discuss what steganography is, what purposes it serves, and will provide an example using available software.
There are a large number of steganographic （2）that most of us are familiar with (especially if you watch a lot of spy movies), ranging from invisible ink and microdots to secreting a hidden message in the second letter of each word of a large body of text and spread spectrum radio communication. With computers and networks, there are many other ways of hiding informations, such as:
Covert channels (c,g, Loki and some distributed denial-of-service tools use the Internet Control （3）Protocol, or ICMP, as the communication channel between the “bad guy”and a compromicyed system)
Hidden text within Web pages
Hiding files in “plain sight”(c,g. what better place to “hide”a file than with an important sounding name in the c:\winnt system32 directory)
Null ciphers(c,g, using the first letter of each word to form a hidden message in an otherwise innocuous text)
steganography today, however, is significantly more （4）than the example about suggest, allowing a user to hide large amounts of information within image and audio. These forms of steganography often are used in conjunction with cryptography so the information is double protected; first it is encrypted and then hidden so that an advertisement first. find the information ( an often difficult task in and of itself) and the decrypted it.
The simplest approach to hiding data within an image file is called （5）signature insertion. In this method, we can take the binary representation of the hidden data and the bit of each byte within the covert image. If we are using 24-bit color the amount and will be minimum and indiscriminate to the human eye.
（1）A、Cryptography
B、Geography
C、Stenography
D、Steganography
（2）A、methods
B、software
C、tools
D、services
（3）A、Member
B、Management
C、Message
D、Mail
（4）A、powerful
B、sophistication
C、advanced
D、easy
（5）A、least
B、most
C、much
D、less

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4、 “如果一條鏈路發(fā)生故障，那么只有和該鏈路相連的終端才會受到影響”，這一說法是適合于以下哪一種拓?fù)浣Y(jié)構(gòu)的網(wǎng)絡(luò)的？（）
A.星型
B.樹型
C.環(huán)型
D.復(fù)合型

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5、Linux系統(tǒng)的運(yùn)行日志存儲的目錄是（  ）。
A./var/log
B./usr/log
C./etc/log
D./tmp/log

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