Internet Protocol Security (IPsec) - answer✔a secure network protocol suite that authenticates
and encrypts the packets of data sent over an Internet Protocol network
Internet Protocol Security (IPsec) - answer✔used in virtual private networks (VPNs)
number of possible TCP ports - answer✔65535
number of possible UDP ports - answer✔65535
RFC1918 24-bit block - answer✔10.0.0.0/8
RFC1918 20-bit block - answer✔172.16.0.0/12
RFC1918 16-bit block - answer✔192.168.0.0/16
Common Vulnerabilities and Exposures (CVE) - answer✔provides a reference-method for
publicly known information-security vulnerabilities and exposures
Common Vulnerability Scoring System (CVSS) - answer✔an open industry standard for assessing
the severity of computer system security vulnerabilities
DREAD - answer✔part of a system for risk-assessing computer security threats
Common Weakness Enumeration (CWE) - answer✔a category system for software weaknesses
and vulnerabilities
National Vulnerability Database (NVD) - answer✔the U.S. government repository of standards-
based vulnerability management data represented using the Security Content Automation
Protocol (SCAP)
threat - answer✔a source of potential disruption, which has the potential to cause a risk
risk - answer✔the combination of consequences of a threat occurring and the likelihood of it
doing so
inherent risk - answer✔the risk that an event will occur which may negatively affect the
achievement of organisation's objectives, assuming there are no controls in place
residual risk - answer✔the risk which remains after taking controls in to account
Session Initiation Protocol (SIP) - answer✔a signaling protocol used for initiating, maintaining,
and terminating real-time sessions that include voice, video and messaging applications
IPsec security architecture - answer✔Authentication Headers (AH)
Encapsulating Security Payloads (ESP)
Security Associations (SA) - Internet Security Association and Key Management Protocol
(ISAKMP); Internet Key Exchange (IKE and IKEv2)
LM - answer✔all passwords are converted into uppercase before generating the hash value
LM - answer✔password length is limited to maximum of 14 characters
LM - answer✔a 14-character password is broken into 7+7 characters and the hash is calculated
for the two halves separately
LM - answer✔if the password is 7 characters or less, then the second half of hash will always
produce same constant value (AAD3B435B51404EE)
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