Paloalto Networks Updated Apprentice Exam Questions and Answers by neriah

In the cloud shared responsibility model, the cloud provider is primarily responsible for the security of the cloud: the physical facilities, host servers, storage hardware, networking equipment, and foundational infrastructure used to deliver services. Therefore, securing underlying physical servers and network infrastructure is the provider responsibility. Customers are responsible for security in the cloud, which includes how they configure services, protect data, manage identities, and secure applications. Application-level settings are usually controlled by the customer or application owner. User access and permissions are identity-layer responsibilities and normally remain with the customer, even if the provider supplies IAM tools. End-user training is an organizational governance responsibility, not a provider obligation. The exact division changes by service model: SaaS shifts more operational responsibility to the provider, while IaaS leaves more configuration and workload security responsibility with the customer. Reference/topics: Cloud Security 5.3, cloud shared responsibility model; Cloud Security 5.2, SaaS, PaaS, IaaS, NaaS.

A private cloud is appropriate when a company requires an isolated environment, strict compliance support, and enhanced control over security. Private cloud infrastructure is dedicated to a single organization and can be hosted on-premises or by a provider. It allows greater control over data location, access, architecture, and security configuration than a general public cloud model. A hybrid cloud combines private and public resources, but the question emphasizes isolation rather than mixed deployment. A public cloud is shared provider infrastructure used by many customers and may not satisfy isolation requirements without additional controls. A community cloud is shared by organizations with common requirements, but it is not dedicated to one organization. Private cloud does not automatically guarantee security; it still requires strong identity controls, monitoring, patching, segmentation, and governance. Its advantage is control and dedicated use, which can support sensitive or regulated workloads. Reference/topics: Cloud Security 5.1, cloud deployment models; Cloud Security 5.3, shared responsibility.

Software as a Service provides a complete application hosted and operated by a third-party provider and made available to customers over a network, usually through a browser or client application. The customer consumes the software without managing the underlying servers, operating system, runtime, or application infrastructure. Examples include business productivity suites, CRM platforms, collaboration tools, and many security consoles. PaaS provides a managed development or application platform, not a finished application. IaaS provides infrastructure resources such as compute and storage, leaving the customer responsible for more of the workload stack. Desktop as a Service provides hosted virtual desktops, but it is not the general model described by a provider-hosted application ready for customer use. SaaS changes the shared responsibility boundary because the provider handles more of the application delivery stack, while the customer still manages data, users, access policies, and configuration choices. Reference/topics: Cloud Security 5.2, SaaS, PaaS, IaaS, NaaS; Cloud Security 5.3, shared responsibility.

A switch operates primarily at OSI Layer 2, the Data Link layer. It forwards Ethernet frames based on MAC addresses and builds a MAC address table to determine which port should receive traffic. This makes switching more efficient than a hub, which operates at Layer 1 and repeats signals without understanding frames. A router operates at Layer 3 by forwarding packets based on IP addresses and routing tables. A modem is generally associated with physical or access-layer signal conversion rather than Layer 2 switching. Layer 2 switching is important for local network communication, VLAN segmentation, and broadcast domain control. Security teams need to understand Layer 2 because attacks such as MAC flooding, VLAN hopping, and ARP spoofing can occur at this level. While switches are not the same as firewalls, proper switch configuration supports network segmentation and reduces unnecessary traffic exposure. Reference/topics: Network Fundamentals 2.7, devices operating Layers 1 through 4; Network Security 3.1, VLANs.