SecureSoftWorld Pvt. Ltd. is an IT company that develops software solutions catering to the needs of the healthcare industry. Most of its services…

The Google App Engine firewall allows developers to control access to their application through a set of rules based on IP addresses. According to the official Google Cloud documentation on quotas and limits for the App Engine standard environment, a project is limited to a maximum of 1000 firewall rules. This limit is a hard constraint on the service. Therefore, SecureSoftWorld Pvt. Ltd can define up to 1000 unique firewall rules to secure its applications hosted on Google App Engine.

A. Up to 10000 is incorrect; the documented limit is significantly lower than this number.
C. Up to 10 is incorrect; this number is far too low for most enterprise use cases and is not the documented limit.
D. Up to 100 is incorrect; while a plausible number, the official quota is higher.

1. Google Cloud. (n.d.). Quotas and limits | App Engine standard environment. Retrieved from https://cloud.google.com/appengine/docs/standard/quotas. Under the "Firewall" section, the table entry for "Maximum firewall rules per project" explicitly states the limit is "1000".

2. Google Cloud. (n.d.). Controlling App Access with Firewalls. Retrieved from https://cloud.google.com/appengine/docs/standard/python/creating-firewalls. This document describes the functionality of the App Engine firewall, for which the previously cited quota applies.