Computer practice question for SSC. Select an option to check your answer, read the explanation and continue practicing.
Which of the following options correctly defines a firewall in the context of computing?
Correct Answerसही उत्तर
C. It is a combination of both software and hardware devices to permit or deny network transmission based on a set of rules.C. यह सॉफ्टवेयर और हार्डवेयर दोनों उपकरणों का संयोजन है, जो नियमों के एक सेट के आधार पर network transmission को अनुमति देता या रोकता है।
Explanationव्याख्या
The printed solution selects option (c): a firewall is a combination of both software and hardware devices used to permit or deny network transmission according to a set of rules.
The source explanation, however, describes a firewall as a security device — 'computer hardware or software' — that can protect a network by filtering traffic and blocking outsiders from gaining unauthorised access to private data on a computer.
The core idea is consistent: a firewall applies rules, filters network traffic and helps prevent unauthorised access.
However, there is a wording difference between the option and explanation.
Option (c) says a firewall is a 'combination of both software and hardware devices', while the explanation says it may be computer hardware OR software.
Because this project preserves source inconsistencies rather than silently reconciling them, the printed answer remains index 2 but the record is marked for review.
Source-supported revision points are: Firewall — Security Device — Hardware or Software according to explanation — Filters Traffic — Helps Protect Network — Blocks Outsiders
Unauthorised Access — permits or denies network transmission according to rules in the printed option.
Option (d) is clearly rejected because a firewall does not simply permit every transmission.
The answer remains option (c) as printed, with the wording discrepancy explicitly noted.
Printed solution option (c) को सही बताती है: Firewall software और hardware दोनों devices का combination है जो rules के आधार पर network transmission को permit या deny करता है। लेकिन source explanation Firewall को एक security device बताती है जो 'computer hardware or software' हो सकता है और traffic filtering तथा outsiders को private data तक unauthorized access से block करके network protect करता है। Core concept consistent है: Firewall rules apply करता है, traffic filter करता है और unauthorized access रोकने में मदद करता है। लेकिन wording में difference है। Option (c) कहता है 'combination of both software and hardware', जबकि explanation कहती है hardware OR software। Project requirement के अनुसार contradiction या wording mismatch को silently reconcile नहीं करना है। इसलिए printed answer index 2 preserve किया गया है, लेकिन record review के लिए mark किया गया है। Source-supported revision points हैं: Firewall — Security Device — Explanation के अनुसार Hardware or Software — Traffic Filtering — Network Protection — Unauthorized Access Blocking — Printed Option के अनुसार Rules के आधार पर Network Transmission Permit/Deny। Option (d) clearly incorrect है क्योंकि उसमें हर network transmission को permit करने की बात है। इसलिए source के printed solution के अनुसार option (c) answer रहेगा, लेकिन wording discrepancy note की गई है।
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