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NEW QUESTION # 53
Which of the following statements regarding Authorization and Authentication is true?
Answer: C
Explanation:
Authentication and Authorization (often abbreviated as AuthN and AuthZ) are foundational pillars of access control in network security:
Authentication (AuthN): Verifies "who you are" by validating credentials against a trusted source. Examples include passwords, MFA (multi-factor authentication), certificates, or biometrics. It ensures the entity (user, device) is legitimate, typically via protocols like Kerberos or LDAP.
Authorization (AuthZ): Determines "what you can do" after authentication, enforcing policies on resource access (e.g., read/write permissions, API calls). It relies on mechanisms like Access Control Lists (ACLs), Role-Based Access Control (RBAC), or Attribute-Based Access Control (ABAC).
Option A correctly separates these roles:
Authorization governs access decisions (e.g., "Can user X read file Y?").
Authentication establishes identity (e.g., "Is this user X?").
In practice, these processes are sequential: AuthN precedes AuthZ. For example, logging into a VPN authenticates your identity (e.g., via username/password), then authorizes your access to specific subnets based on your role. CNSP likely stresses this distinction for designing secure systems, as conflating them risks privilege escalation or identity spoofing vulnerabilities.
Why other options are incorrect:
B: Reverses the definitions-Authentication doesn't grant/deny access (that's AuthZ), and Authorization doesn't validate identity (that's AuthN). This mix-up could lead to flawed security models.
C: Falsely equates AuthN and AuthZ and attributes access rules to AuthN. They're distinct processes; treating them as identical undermines granular control (e.g., NIST SP 800-53 separates IA-2 for AuthN and AC-3 for AuthZ).
D: Misassigns access control to AuthN and claims they don't interoperate, which is false-they work together in every modern system (e.g., SSO with RBAC). This would render auditing impossible, contradicting security best practices.
Real-World Context: A web server (e.g., Apache) authenticates via HTTP Basic Auth, then authorizes via .htaccess rules-two separate steps.
NEW QUESTION # 54
Which of the following represents a valid Windows Registry key?
Answer: D
Explanation:
The Windows Registry is a hierarchical database storing system and application settings, organized into predefined root keys (hives). Only specific names are valid as top-level keys.
Why A is correct: HKEY_LOCAL_MACHINE (HKLM) is a standard root key containing hardware and system-wide configuration data. CNSP references it for security settings analysis (e.g., auditing policies).
Why other options are incorrect:
B: HKEY_INTERNAL_CONFIG is not a valid key; no such hive exists.
C: HKEY_ROOT_CLASSES is a misspelling; the correct key is HKEY_CLASSES_ROOT (HKCR).
D: HKEY_LOCAL_USER is incorrect; the valid key is HKEY_CURRENT_USER (HKCU).
NEW QUESTION # 55
Which is the correct command to change the MAC address for an Ethernet adapter in a Unix-based system?
Answer: B
Explanation:
In Unix-based systems (e.g., Linux), the ifconfig command is historically used to configure network interfaces, including changing the Media Access Control (MAC) address of an Ethernet adapter. The correct syntax to set a new MAC address for an interface like eth0 is ifconfig eth0 hw ether AA:BB:CC:DD:EE:FF, where hw specifies the hardware address type (ether for Ethernet), followed by the new MAC address in colon-separated hexadecimal format.
Why A is correct: The hw ether argument is the standard and correct syntax recognized by ifconfig to modify the MAC address. This command temporarily changes the MAC address until the system reboots or the interface is reset, assuming the user has sufficient privileges (e.g., root). CNSP documentation on network configuration and spoofing techniques validates this syntax for testing network security controls.
Why other options are incorrect:
B: hdw is not a valid argument; it's a typographical error and unrecognized by ifconfig.
C: hdwr is similarly invalid; no such shorthand exists in the command structure.
D: hwr is incorrect; the full keyword hw followed by ether is required for proper parsing.
NEW QUESTION # 56
What RID is given to an Administrator account on a Microsoft Windows machine?
Answer: D
Explanation:
In Windows, security principals (users, groups) are identified by a Security Identifier (SID), formatted as S-1-<authority>-<domain>-<RID>. The RID (Relative Identifier) is the final component, unique within a domain or machine. For local accounts:
RID 500: Assigned to the built-in Administrator account on every Windows machine (e.g., S-1-5-21-<machine>-500).
Created during OS install, with full system privileges.
Disabled by default in newer Windows versions (e.g., 10/11) unless explicitly enabled.
RID 501: Guest account (e.g., S-1-5-21-<machine>-501), limited access.
Technical Details:
Stored in SAM (C:WindowsSystem32configSAM).
Enumeration: Tools like wmic useraccount or net user reveal RIDs.
Domain Context: Domain Admins use RID 512, but the question specifies a local machine.
Security Implications: RID 500 is a prime target for brute-forcing or pass-the-hash attacks (e.g., Mimikatz). CNSP likely advises renaming/disabling it (e.g., via GPO).
Why other options are incorrect:
A . 0: Reserved (e.g., Null SID, S-1-0-0), not a user RID.
C . 501: Guest, not Administrator.
D . 100: Invalid; local user RIDs start at 1000 (e.g., custom accounts).
Real-World Context: Post-compromise, attackers query RID 500 (e.g., net user Administrator) for privilege escalation.
NEW QUESTION # 57
A system encrypts data prior to transmitting it over a network, and the system on the other end of the transmission media decrypts it. If the systems are using a symmetric encryption algorithm for encryption and decryption, which of the following statements is true?
Answer: B
Explanation:
Symmetric encryption is a cryptographic technique where the same key is used for both encryption and decryption processes. In the context of network security, when data is encrypted prior to transmission and decrypted at the receiving end using a symmetric encryption algorithm (e.g., AES or Triple-DES), both the sender and receiver must share and utilize an identical secret key. This key is applied by the sender to transform plaintext into ciphertext and by the receiver to reverse the process, recovering the original plaintext. The efficiency of symmetric encryption makes it ideal for securing large volumes of data transmitted over networks, provided the key is securely distributed and managed.
Why A is correct: Option A accurately describes the fundamental property of symmetric encryption-using a single shared key for both encryption and decryption. This aligns with CNSP documentation, which emphasizes symmetric encryption's role in securing data in transit (e.g., via VPNs or secure file transfers).
Why other options are incorrect:
B: This describes asymmetric encryption (e.g., RSA), where different keys (public and private) are used for encryption and decryption, not symmetric encryption.
C: Symmetric encryption inherently relies on keys; the absence of keys contradicts its definition and operational mechanism.
D: Symmetric encryption is not inherently insecure; its security depends on key strength and management practices, not the algorithm itself. CNSP highlights that algorithms like AES are widely regarded as secure when implemented correctly.
NEW QUESTION # 58
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