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A company provides an API that runs on the public cloud for its customers. A fixed number of VMs host the APIs. During peak hours, the company notices a spike in usage that results in network communication speeds slowing down for all customers. The management team has decided that access for all customers should be fair and accessible at all times. Which of the following is the most cost-effective way to address this issue?
Implementing request throttling (rate limiting) lets you cap how many requests each customer can make per time unit. This ensures no single user can saturate the API servers, providing fair access across all customers without the recurring costs of adding more VMs.
A SaaS company is launching a new product based in a cloud environment. The new product will be provided as an API and should not be exposed to the internet. Which of the following should the company create to best meet this requirement?
AWS PrivateLink (a private service endpoint) lets you expose your API over an interface endpoint directly into each customer's VPC without ever traversing the public internet, ensuring the service remains fully private.
As part of a project to modernize a sports stadium and improve the customer service experience for fans, the stadium owners want to implement a new wireless system. Currently, all tickets are electronic and managed by the stadium mobile application. The new solution is required to allow location tracking precision within 5ft (1.5m) of fans to deliver the following services:
Emergency/security assistance
Mobile food order
Event special effects
Raffle winner location displayed on the giant stadium screen
Which of the following technologies enables location tracking?
BLE (Bluetooth Low Energy) is a wireless personal area network (WPAN) technology designed for applications that require lower energy consumption and reduced cost while maintaining a communication range similar to classic Bluetooth. BLE supports location tracking with an accuracy range typically between 1 to 2 meters (approximately 3 to 6 feet), making it ideal for applications that demand fine-grained location services, such as stadium services requiring real-time user proximity data.
According to the CompTIA CloudNetX CNX-001 Official Objectives, under the Network Architecture domain, specifically in the subdomain:
'Wireless Technologies: Identify capabilities of BLE, NFC, RFID, and IoT devices within a network environment,' it is outlined that:
'BLE enables proximity-based services and real-time indoor location tracking with high accuracy when used with beacon infrastructure.'
'BLE beacons can be deployed throughout a physical space, transmitting signals received by mobile applications to determine a user's location within a few feet.'
'BLE is widely adopted for use cases including indoor navigation, asset tracking, and personalized user engagement, making it a critical technology for modern high-density venues such as stadiums.'
In comparison:
SSID merely identifies a wireless network and has no location tracking function.
NFC requires close contact (under 4 cm), and is not suitable for continuous or broad-range tracking.
IoT is an overarching category that includes connected devices and sensors; however, IoT is not a standalone location tracking technology. It may include BLE as a component, but BLE specifically provides the precise location tracking functionality.
These distinctions are explicitly addressed in the CompTIA CloudNetX CNX-001 Study Guide, under the section:
''Emerging Network Technologies and Architectures'', where BLE is described as a key enabling technology for context-aware and location-based services in enterprise and public environments.
A call center company provides its services through a VoIP infrastructure. Recently, the call center set up an application to manage its documents on a cloud application. The application is causing recurring audio losses for VoIP callers. The network administrator needs to fix the issue with the least expensive solution. Which of the following is the best approach?
Prioritizing VoIP packets over the document-management traffic ensures that voice gets the necessary bandwidth and low latency even when the network is congested - all without the cost of new links or hardware.
A cloud network engineer needs to enable network flow analysis in the VPC so headers and payload of captured data can be inspected. Which of the following should the engineer use for this task?
VPC Traffic Mirroring lets you capture copies of inbound and outbound network traffic, full packet headers and payload, and send them to appliances or analysis tools for deep inspection, which goes beyond the metadata provided by standard flow logs.
