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ECE = 64 CWR =128 Example: To calculate SYN/ACK flag decimal value, add 2 (which is the decimal value of the SYN flag) to 16 (which is the decimal value of the ACK flag), so the result would be 18. Based on the above calculation, what is the decimal value for XMAS scan? A. B. C. D. 23 24 41 64 Correct Answer: C Section: (none) Explanation Explanation/Reference: Explanation: QUESTION 164 A simple compiler technique used by programmers is to add a terminator 'canary word' containing four letters NULL (0x00), CR (0x0d), LF (0x0a) and EOF (0xff) so that most string operations are terminated. If the canary word has been altered when the function returns, and the program responds by emitting an intruder alert into syslog, and then halts what does it indicate? A. B. C. D. E. A buffer overflow attack has been attempted A buffer overflow attack has already occurred A firewall has been breached and this is logged An intrusion detection system has been triggered The system has crashed Correct Answer: A Section: (none) Explanation Explanation/Reference: Explanation: QUESTION 165 This is an example of whois record.