By James M. Stewart, Ed Tittel, Mike Chapple
Construction at the renowned Sybex learn consultant technique, CISSP: qualified info platforms protection expert examine consultant, 4th version presents a hundred% assurance of the CISSP physique of data examination targets. locate transparent and concise info on an important safety issues, useful examples and insights drawn from real-world adventure, and state of the art examination instruction software program, together with full-length bonus checks and digital flashcards. organize your self through reviewing the foremost examination subject matters, together with entry keep an eye on, software safeguard, enterprise continuity and catastrophe restoration making plans, cryptography; info safeguard and danger administration, and protection structure and layout telecommunications and community protection.
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The major flaw in such an approach is that large massive structures often have minor weakness and flaws; are difficult if not impossible to reconfigure, adjust, or move; and are easily seen and avoided by would-be attackers (in other words, they find easier ways into protected areas). In a layered security or defense-in-depth deployment, your assets are surrounded by a layer of protection provided for by administrative access controls, which in turn is surrounded by a layer of protection consisting of logical or technical access controls, which is finally surrounded by a layer of protection that includes physical access controls.
In most cases, the system evaluates an access control matrix that compares the subject, the object, and the intended activity (we discuss the access control matrix in greater detail in Chapter 11, “Principles of Computer Design”). If the specific action is allowed, the subject is authorized. If the specific action is not allowed, the subject is not authorized. Keep in mind that just because a subject has been identified and authenticated, it does not automatically mean it has been authorized. It is possible for a subject to log onto a network (in other words, be identified and authenticated) yet be blocked from accessing a file or printing to a printer (in other words, by not being authorized to perform such activities).
Buffer overflow C. SYN flood D. Distributed denial of service 17. What is the value of the logical operation shown here? X: Y: X ⊕ Y: 0 1 1 0 1 0 0 0 1 1 0 1 ? A. 0 1 1 1 1 1 B. 0 1 1 0 1 0 C. 0 0 1 0 0 0 D. fm Page xxxviii Thursday, May 22, 2008 10:26 AM xxxviii Assessment Test 18. In what type of cipher are the letters of the plain-text message rearranged to form the cipher text? A. Substitution cipher B. Block cipher C. Transposition cipher D. One-time pad 19. What is the length of a message digest produced by the MD5 algorithm?