Computer practice question for SSC. Select an option to check your answer, read the explanation and continue practicing.
Which of the following statements about a firewall, in the context of computing, is INCORRECT?
Correct Answerसही उत्तर
D. It is unable to permit legitimate communication to pass.D. यह legitimate communication को गुजरने की अनुमति नहीं दे सकता।
Explanationव्याख्या
The printed solution identifies option (d), 'It is unable to permit legitimate communication to pass', as the incorrect statement.
According to the source explanation, a firewall is a network-security system that monitors and controls incoming and outgoing network traffic according to predetermined security rules and establishes a barrier between a trusted network and an untrusted network.
The book further divides firewalls into network-based and host-based systems.
Network-based firewalls may be positioned within a LAN or WAN and, according to the source, may take the form of a software appliance on general-purpose hardware, a hardware appliance on special-purpose hardware, or a virtual appliance on a virtual host.
Host-based firewalls are deployed directly on the host to control network traffic or other computing resources.
There is, however, a wording tension in the source: option (b) says a firewall 'is a combination of both software and hardware devices', while the explanation allows different implementations rather than requiring a combination of both.
This is similar to an inconsistency already seen in Q669.
Because the project requires faithful source preservation, the printed answer remains index 3, but this record is marked for review.
The central source concept is clear: firewalls control traffic according to rules and protect trusted systems from untrusted networks.
Option (d) is the book's intended incorrect statement.
Printed solution option (d), 'यह legitimate communication को pass होने की अनुमति नहीं दे सकता', को incorrect statement बताती है। Source explanation के अनुसार Firewall एक network-security system है जो predetermined security rules के आधार पर incoming और outgoing network traffic monitor तथा control करता है और trusted network तथा untrusted network के बीच barrier establish करता है। Book firewalls को network-based और host-based systems में categorize करती है। Network-based firewalls LAN या WAN के भीतर positioned हो सकते हैं और source के अनुसार general-purpose hardware पर software appliance, special-purpose hardware पर hardware appliance या virtual host पर virtual appliance हो सकते हैं। Host-based firewalls सीधे host पर deploy किए जाते हैं ताकि network traffic या अन्य computing resources control किए जा सकें। हालांकि source में wording inconsistency है। Option (b) कहता है कि Firewall software और hardware devices दोनों का combination है, जबकि explanation बताती है कि Firewall अलग-अलग implementations—software appliance, hardware appliance या virtual appliance—हो सकता है। यह Q669 जैसी discrepancy है। Source को silently reconcile न करने की requirement के कारण printed answer index 3 preserve किया गया है, लेकिन record review के लिए mark किया गया है। Main concept clear है: Firewall rules के आधार पर traffic control करता है और trusted/untrusted networks के बीच security barrier बनाता है। Source के intended answer के अनुसार option (d) गलत statement है।
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