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NEW QUESTION # 13
Public & Private key pairs are an example of what technology?
Answer: B
Explanation:
Public and private key pairs are the foundation of asymmetric encryption, also called public key cryptography. In this model, each entity has two mathematically related keys: a public key that can be shared widely and a private key that must be kept secret. The keys are designed so that what one key does, only the other key can undo. This enables two core security functions used throughout cybersecurity architectures.
First, confidentiality: data encrypted with a recipient's public key can only be decrypted with the recipient's private key. This allows secure communication without having to share a secret key in advance, which is especially important on untrusted networks like the internet. Second, digital signatures: a sender can sign data with their private key, and anyone can verify the signature using the sender's public key. This provides authenticity (proof the sender possessed the private key), integrity (the data was not altered), and supports non-repudiation when combined with proper key custody and audit practices.
These mechanisms underpin widely used security controls such as TLS for secure web connections, secure email standards, code signing, and certificate-based authentication. A VPN may use public key cryptography during key exchange, but the key pair itself is specifically an encryption technology. IoT and network segregation are unrelated categories.
NEW QUESTION # 14
Certificates that provide SSL/TLS encryption capability:
Answer: B
Explanation:
SSL/TLS relies on digital certificates to support encrypted communications and to help users trust that they are connecting to the correct server. A TLS certificate is typically an X.509 certificate that binds a public key to an identity, such as a domain name, and is digitally signed by a trusted issuer. In most public internet use cases, these certificates are issued by Certificate Authorities that browsers and operating systems already trust through pre-installed root certificates. Because of that trust chain, organizations commonly obtain certificates by purchasing or otherwise obtaining them from certificate authorities, which is why option B is correct.
During the TLS handshake, the server presents its certificate to the client. The client validates the certificate's signature chain, validity period, and that the certificate matches the domain being accessed. Once validated, TLS establishes session keys used to encrypt data in transit and protect it from eavesdropping and tampering. Certificates themselves are not "similar to unencrypted data," and they are not specific to thumb-drive storage; they are used to secure network communications. Certificates also do not primarily provide "authorization" to access data. Authorization is typically enforced by application and access control mechanisms after authentication. Certificates support authentication of endpoints and enable secure key exchange, which are prerequisites for secure transport encryption and trustworthy connections.
NEW QUESTION # 15
What is an embedded system?
Answer: D
Explanation:
An embedded system is a specialized computing system designed to perform a dedicated function as part of a larger device or physical system. Unlike general-purpose computers, embedded systems are built to support a specific mission such as controlling sensors, actuators, communications, or device logic in products like routers, printers, medical devices, vehicles, industrial controllers, and smart appliances. Cybersecurity documentation commonly highlights that embedded systems tend to operate with constrained resources, which may include limited CPU power, memory, storage, and user interface capabilities. These constraints affect both design and security: patching may be harder, logging may be minimal, and security features must be carefully engineered to fit the platform's limitations.
Option C best matches this characterization by describing a small form factor and limited processing power, which are typical attributes of many embedded devices. While not every embedded system is "small," the key idea is that it is purpose-built, resource-constrained, and tightly integrated into a larger product.
The other options describe different concepts. A secure underground facility relates to physical site security, not embedded computing. Being hard to remove is about physical installation or tamper resistance, which can apply to many systems but is not what defines "embedded." Storing cryptographic keys in a tamper-resistant external device describes a hardware security module or secure element use case, not the general definition of an embedded system.
NEW QUESTION # 16
What does non-repudiation mean in the context of web security?
Answer: C
Explanation:
Non-repudiation is a security property that provides verifiable evidence of an action or communication so that the parties involved cannot credibly deny their participation later. In web security, it most commonly means being able to prove who sent a message or performed a transaction and, in many cases, that the message was received and recorded. This is why option D is correct: it captures the idea of giving the receiver proof of the sender's identity and giving the sender evidence that the message or transaction was delivered or accepted.
Cybersecurity guidance typically associates non-repudiation with digital signatures, strong identity binding, and protected audit evidence. A digital signature uses asymmetric cryptography so that only the holder of a private key can sign, while anyone with the public key can verify the signature. When combined with trusted certificates, accurate time sources, and protected logs, this creates strong accountability. Non-repudiation also depends on maintaining the integrity of supporting evidence, such as tamper-resistant audit logs, secure log retention, and controlled access to signing keys.
It is different from confidentiality (encryption of traffic), and different from integrity alone (preventing unauthorized modification). It is also different from authorization and auditing, which support accountability but do not, by themselves, provide cryptographic-grade proof that a specific entity performed a specific action. Non-repudiation is especially important for high-trust transactions such as approvals, payments, and legally binding communications.
NEW QUESTION # 17
Recovery Point Objectives and Recovery Time Objectives are based on what system attribute?
Answer: B
Explanation:
Recovery Time Objective (RTO) and Recovery Point Objective (RPO) are continuity and resilience targets that define how quickly a system must be restored and how much data loss is acceptable after an interruption. These objectives are derived primarily from system criticality, meaning how essential the system is to business operations, safety, revenue, legal obligations, and customer commitments. Highly critical systems support mission-essential functions or time-sensitive services, so they require shorter RTOs (restore fast) and smaller RPOs (lose little or no data). Less critical systems can tolerate longer outages and larger data gaps, allowing longer RTOs and RPOs.
Cybersecurity and business continuity documents tie RTO/RPO determination to business impact analysis results. The BIA identifies maximum tolerable downtime, operational dependencies, and the consequences of service disruption and data unavailability. From there, organizations set RTO/RPO targets that align with risk appetite and required service levels. Those targets then drive technical and operational controls such as backup frequency, replication methods, high availability architecture, failover design, disaster recovery procedures, monitoring, and routine recovery testing.
Sensitivity focuses on confidentiality needs and may influence encryption and access controls, but it does not directly define acceptable downtime or data loss. Vulnerability describes weakness exposure and is used for threat/risk management, not recovery objectives. Cost is a constraint when selecting recovery solutions, but RTO/RPO are defined by business need and system importance first-then solutions are chosen to meet those targets within budget.
NEW QUESTION # 18
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