1. Right Answer: B
Explanation: The Japan Computer Emergency Response Team, or JPCERT, is a cybersecurity information-sharing organization backed by the Japanese government, rather than a specific resource provided by such an organization.
2. Right Answer: C
Explanation: Full Disclosure is a public, vendor-neutral forum for detailed discussion of vulnerabilities and exploitation techniques. It also provides tools, papers, news, and events of interest to the cybersecurity community.
3. Right Answer: A
Explanation: NIST maintains the National Vulnerability Database (NVD) because Full Disclosure is a public forum and is not managed by NIST, nor does it strictly provide analysis on vulnerabilities published to the CVE dictionary. Vulnerabilities are regularly found on Full Disclosure before they are assigned a CVE number, because the CWE is maintained by MITRE, and it provides a community-developed list of common software security weaknesses, and the OWASP, or Open Web Application Security Project, is an open community designed to enable organizations to conceive, develop, acquire, operate, and maintain applications that can be trusted. OWASP is managed by the OWASP Foundation.
4. Right Answer: B
Explanation: The -PS flag is used for TCP SYN discovery to declared ports because SCTP discovery is the result of the -PY flag, TCP ACK discovery is the result of the -PA flag, and UDP discovery is the result of the -PU flag.
5. Right Answer: D
Explanation: Host discovery is an active scanning technique used to aid in the process of information gathering, with the goal of identifying hosts that are live and listening on the network. The simplest method of host discovery is a discovery scan, which is typically a ping-only scan. A caveat must be given here, however, often a target network will automatically drop all ICMP requests. In cases such as these, a stealth connection attempt to a common port or service such as SSH on port 22 or HTTP on port 80 can be an effective method of determining which hosts are up and available on a network.
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