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NEW QUESTION # 134
What is a function of a proxy server?
Answer: A
Explanation:
A proxy server serves several essential functions in network communication:
1.Security and Privacy:
oA proxy server acts as a gateway between the user's device and the internet. When a user sends a request (e.g., accessing a website), it first goes through the proxy server.
oThe proxy server hides the user's IP address, making it difficult for external entities to directly trace the user's location or identity.
oBy acting as an intermediary, the proxy server provides an additional layer of security, protecting the internal network from potential threats and attacks.
2.Content Filtering and Access Control:
oOrganizations often use proxy servers to control internet access for their employees. The proxy can filter requests based on predefined rules.
oFor example, an organization might block access to certain websites (e.g., social media, gambling sites) or restrict access during work hours.
oContent filtering helps maintain productivity and prevent unauthorized access to inappropriate or harmful content.
3.Caching and Acceleration:
oProxy servers can cache frequently accessed web pages, images, and files. When a user requests the same content again, the proxy serves it from its cache.
oCaching reduces the load on the internet connection and speeds up access to commonly visited sites.
oIt also helps save bandwidth by minimizing redundant data transfers.
4.Load Balancing:
oIn large networks, multiple proxy servers can distribute incoming requests to different web servers. This load balancing ensures efficient utilization of resources.
oBy evenly distributing traffic, proxy servers prevent any single server from becoming overwhelmed.
5.Anonymity and Geolocation Bypass:
oSome users use proxy servers to hide their real IP addresses. This anonymity can be useful for privacy reasons or to bypass geolocation restrictions.
oFor example, a user in one country can use a proxy server located in another country to access region-restricted content.
References
1.SoftwareLab: What is a Proxy Server? Types & Examples You Need to Know
2.Kinsta: What Is a Proxy Server Used For? (And How Does It Work?)
3.Fortinet: What is a Proxy Server? Definition, Uses & More
4.KnowledgeHut: What is Proxy Server? Types, Functions & Use Cases
5.Varonis: What is a Proxy Server and How Does it Work?
NEW QUESTION # 135
Which peripheral replaces the mouse on a mobile device?
Answer: B
Explanation:
*The peripheral that replaces the mouse on a mobile device is the Stylus.
*Explanation: A stylus is an input device that allows users to interact with touchscreens by tapping, drawing, or writing. It serves as an alternative to using a traditional mouse for precise input on mobile devices.
* Therefore, the correct answer is A. Stylus
NEW QUESTION # 136
What can applications use to interact with a database?
Answer: C
Explanation:
SQL is the standard language for communicating with relational databases. Applications use SQL to:
*Retrieve data: SELECT queries are used to fetch specific data from database tables.
*Modify data: INSERT, UPDATE, and DELETE statements allow applications to add, change, or remove data in the database.
*Manage database structure: CREATE, ALTER, and DROP statements let applications create tables, modify their structure, or delete them entirely.
NEW QUESTION # 137
What is a characteristic of hot storage?
Answer: C
Explanation:
Hot storage, often discussed alongside hot sites in disaster recovery, refers to storage and recovery capabilities that are ready for rapid use with minimal delay. In IT disaster recovery terms, hot solutions emphasize high availability and quick restoration, which generally requires modern, high-performance, always-ready equipment and frequent data synchronization. Because hot storage is intended to support fast recovery time objectives, it is typically implemented using advanced storage systems, real-time replication, and automated failover technologies. The other options describe characteristics more aligned with colder approaches.
Infrequent access and slow restoration are associated with cold storage or cold sites, where backups may be archived and recovery takes longer. Using lower-performance equipment also fits cold or warm recovery strategies, where cost savings are prioritized over immediate availability. Hot storage solutions are designed to minimize downtime and data loss, and this generally implies up-to-date, capable infrastructure rather than reduced performance. Therefore, among the options provided, the best characteristic of hot storage is that it typically uses innovative equipment.
NEW QUESTION # 138
What is a step for considering risk during the planning phase of project management?
Answer: A
Explanation:
Risk planning in project management includes identifying risks and then analyzing and prioritizing them so the team can focus on the most serious threats. A standard step taught in Information Technology project management is prioritizing risks by severity and likelihood. Severity reflects the impact on scope, cost, schedule, security, or quality if the risk occurs, while likelihood reflects the probability of occurrence.
Combining these factors helps create a risk matrix and guides decisions about mitigation strategies, contingency plans, and resource allocation. Comparing project progress to milestones is part of monitoring and controlling during execution, not risk planning. Listing each possible cause of failure is related to risk identification, but on its own it does not complete the analysis step that determines which risks matter most.
Establishing clear and attainable goals is part of initiation and planning, but it is not specifically a risk analysis technique. Because the question asks for a step for considering risk during planning, prioritizing by severity and likelihood is the best match. Therefore, the correct answer is option A.
NEW QUESTION # 139
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