What is the primary role of an explicit forward proxy server in a network?

To act as an intermediary for client requests seeking resources from other servers.

To distribute incoming requests among multiple backend servers.

To store frequently accessed data close to the client to improve performance.

To encrypt all traffic between the client and the destination server.

A common benefit of using a caching proxy server is to:

Reduce network bandwidth usage and improve response times for frequently accessed content.

Hide the identity of the backend servers from clients.

Encrypt all data transmission between the client and the proxy.

Filter outbound spam emails from a corporate network.

How does a transparent proxy primarily differ from a non-transparent (explicit) forward proxy from the client's perspective?

Clients are typically unaware they are using a transparent proxy, whereas an explicit proxy requires manual configuration or browser settings.

A transparent proxy always encrypts traffic, while an explicit proxy does not.

A transparent proxy can only handle HTTP traffic, while an explicit proxy handles all protocols.

An explicit proxy can bypass firewalls, but a transparent proxy cannot.

If a client behind an explicit forward proxy makes a request to an external website, what IP address will the destination website typically see as the source of the request?

The IP address of the forward proxy server.

The client's internal private IP address.

The IP address of the client's default gateway.

A randomly generated anonymous IP address unrelated to the proxy or client.

A large-scale microservices architecture often utilizes an API Gateway, which incorporates functionalities similar to a reverse proxy. Beyond simple request routing to microservices, what advanced capability could such a component provide that directly aids in managing multiple backend services?

Performing cross-cutting concerns like authentication, authorization, rate limiting, and request transformation before requests reach individual services.

Directly managing database connections for all microservices.

Executing the core business logic for each microservice.

Distributing application code updates to all running service instances.

Consider a scenario where a company needs to both control internal employee access to the internet (security, content filtering) and protect its public-facing web applications from direct client access while distributing traffic among backend servers. Which combination of proxy types would best achieve these dual objectives, and what are their respective primary roles?

A forward proxy for internal users and a reverse proxy for public-facing applications.

Two reverse proxies: one for internal filtering, one for external traffic distribution.

Two transparent proxies: one for internal filtering, one for external traffic distribution.

A SOCKS proxy for internal users and a caching proxy for public applications.

A system architect is evaluating whether to implement a shared enterprise-level caching proxy or rely solely on individual web browsers' caching mechanisms within a large corporate network. What is a critical advantage of the enterprise-level caching proxy that is not easily achievable with client-side caching alone, considering network efficiency and data consistency?

It can serve cached content to multiple clients from a single fetch, significantly reducing redundant external traffic and ensuring consistent content across users.

It allows for personalized content delivery to each user based on their browsing history.

It ensures every user has their own dedicated cache, improving individual privacy.

It provides stronger encryption for all cached data compared to browser caching.

Concept of proxy server in system design — Free MCQ Practice Test

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