CCNA Cloud Computing Concepts Questions

If outbound HTTPS is allowed, the issue may be with DNS resolution, which can be blocked or misconfigured by the office network. The CRM's domain name might not resolve correctly, preventing the connection. The technician should test DNS resolution for the CRM's URL.

Rapid elasticity is the ability to automatically scale resources up or down based on demand. This is a key characteristic of cloud computing. Other options like measured service or resource pooling are related but do not directly describe auto-scaling.

When moving sensitive data to the cloud, encryption at rest and in transit is critical to protect against unauthorized access. While access controls and compliance are important, encryption is a fundamental requirement. The shared responsibility model means the provider secures the infrastructure, but the customer must secure the data.

Cloud file sync issues often stem from authentication problems, such as expired credentials or session tokens. Since the service is running and connectivity is fine, the most likely cause is that the user's login token expired and needs re-authentication. Checking the sync logs would reveal the authentication failure.

This question tests knowledge of advanced cloud pricing models. A spot instance (or preemptible VM) uses unused cloud capacity at a steep discount but can be terminated when the provider needs the resources back. On-demand is full price, reserved is for long-term commitments, and dedicated hosts are for isolation, not cost savings with termination risk.

This scenario tests understanding of cloud computing characteristics, specifically latency. Slow application opening and disconnections are classic symptoms of high latency, which is often caused by the physical distance data must travel over a satellite connection. The other options (elasticity, scalability, high availability) are cloud features that do not directly address network delay.

In PaaS, the provider manages the runtime environment, including dependencies and configuration. An update may have changed the underlying platform (e.g., runtime version, library) that the application relies on, causing incompatibility. The developer's code is fine, so the issue is environmental.

This scenario tests understanding of geolocation restrictions in cloud services. Many cloud applications use geolocation to enforce licensing, compliance, or content restrictions based on the user's physical location. High availability, multi-tenancy, and resource pooling are unrelated to region-based access controls.

Cloud VMs often experience resource contention due to noisy neighbors in multi-tenant environments. Even if the instance type meets specs, performance can degrade if other tenants on the same physical host consume resources. The technician should check if the instance is on a shared host and consider dedicated instances.

This scenario tests the concept of elasticity in cloud computing. Elasticity allows resources to automatically scale up or down based on demand, which is ideal for handling traffic spikes. Scalability is a broader term that can include manual scaling, while high availability and fault tolerance focus on uptime, not automatic adjustment to load changes.

Most cloud IaaS providers allow creating a new volume from a snapshot, which can then be attached to the existing VM. This is faster than restoring the entire VM from a full image. The technician should create a new disk from the snapshot and attach it, then copy the data to the original disk if needed.

This question tests the distinction between PaaS and other service models. Platform as a Service (PaaS) provides a managed platform including OS, runtime, and database, allowing the customer to focus on deploying their application without patching the OS. IaaS gives full control but requires OS management, SaaS is a finished application, and DaaS is for virtual desktops.

This question covers cloud deployment models. A hybrid cloud combines public cloud services (for email/collaboration) with private or on-premises infrastructure (for sensitive data). Public cloud alone would violate regulations, community cloud is for shared industry needs, and private cloud is entirely on-premises, missing the benefits of public cloud for non-sensitive workloads.

This question tests understanding of cloud service models. Software as a Service (SaaS) provides ready-to-use applications over the internet, eliminating the need for local installation. The scenario specifically requires access to calendar and document editing tools, which are typical SaaS offerings.

This scenario describes Software as a Service (SaaS), where the provider delivers a complete application over the internet. The user only needs a web browser and does not manage the underlying OS, servers, or updates. IaaS would give virtual machines, PaaS would provide a development platform, and DaaS would deliver virtual desktops.

Elasticity is the ability to automatically scale resources up and down in response to demand. This is a key benefit of cloud computing, allowing cost efficiency while handling spikes. Scalability is a broader term that includes manual scaling, but elasticity specifically implies automatic, dynamic adjustment.

SaaS (Software as a Service) delivers applications over the internet, accessible via a web browser without local installation. This matches the requirement of accessing accounting software from any device without installation. PaaS and IaaS provide platforms or infrastructure, not end-user applications.

For data in transit, TLS/SSL encrypts communication between the application and the database. For data at rest, the cloud provider's encryption feature (e.g., AWS EBS encryption or Azure SQL TDE) encrypts the stored data. AES-256 is a common encryption standard for at-rest data, but it must be implemented by the provider's service.

A multi-cloud strategy involves using services from multiple cloud providers to avoid dependence on a single vendor. This is distinct from a hybrid cloud, which combines public and private clouds. Public cloud uses one provider, and community cloud is shared among organizations.

In a hybrid cloud, latency and bandwidth issues often stem from the internet connection between the on-premises site and the cloud. Even if the local network is fine, the WAN link may be congested or have high latency. DNS or firewall issues would typically cause complete failures, not intermittent slowness.

This scenario requires the customer to manage the OS and applications, which is characteristic of IaaS. IaaS provides virtual machines where the user controls the OS and installed software, while the provider manages the physical hardware.

In IaaS, performance issues during peak hours often indicate that the virtual machine lacks sufficient resources (CPU, RAM) to handle increased load. Scaling up the VM or adding more instances can resolve this. Other factors like local internet or power are less likely to be the primary cause.

This scenario tests understanding of latency in a global cloud context. When an application is hosted far from the user, the physical distance increases network latency, causing slow performance. Bandwidth could be a factor but is not directly tied to geographic distance, while elasticity and fault tolerance are unrelated to the location of the host.

Object storage is ideal for storing and retrieving individual files with versioning capabilities, enabling point-in-time recovery. It is scalable and commonly used for backup. Block storage is for raw volumes, and file storage is for shared file systems, but object storage offers the best granularity for file-level recovery over time.

High availability across regions is achieved through redundancy, such as replicating data to multiple geographic locations. This ensures that if one region fails, another can serve the data. Scalability, elasticity, and fault tolerance at a single site do not provide geographic redundancy.

High latency significantly impacts VDI performance, especially during login when many resources are loaded. Deploying a local VDI broker or caching server at the remote office reduces round-trip time. Alternatively, using a CDN or WAN optimization can help, but a local broker is most effective for VDI.

This question tests troubleshooting cloud synchronization issues. A common cause is the client application being stopped or crashed, which prevents syncing despite a working internet connection. Account suspension would block access entirely, firewall rules would affect other services too, and server downtime would impact all users, not just one.

A hybrid cloud deployment combines on-premises infrastructure with public cloud services, allowing data migration while maintaining local access during the transition. This ensures existing emails can be retained and synchronized. A public-only or private-only model would not support the migration seamlessly.

SaaS applications are entirely dependent on internet connectivity. A local cached copy of the data can provide offline access. Other options like VPN or secondary internet are not practical for all employees, and a local server would require a different service model.