ACLs vs Capabilities

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Which type of CAPTCHA is NOT mentioned in the text?

Audio

Visual

OCR

Text-based (correct)

What is the purpose of using CAPTCHA?

To index websites by search engines

To prevent access by bots/computers (correct)

To generate and grade tests

To filter out spam emails

What was the original motivation for creating CAPTCHA?

To prevent automated bots from stuffing ballot boxes (correct)

To provide free email services

To index websites by search engines

To challenge humans with difficult tests

What is the main advantage of a packet filter firewall?

Speed Signup and view all the answers

What is the main disadvantage of a stateful packet filter?

Slower than packet filtering Signup and view all the answers

What does a firewall do in the context of network security?

Controls access to a network Signup and view all the answers

What is the purpose of an application proxy firewall?

To provide a complete view of connections and application data Signup and view all the answers

What is the role of a CAPTCHA in preventing automated sign-ups for email accounts?

To prevent access by bots/computers Signup and view all the answers

What is the main challenge in breaking CAPTCHAs?

Segmentation problem Signup and view all the answers

What is the analogy used to describe the role of a firewall?

A secretary filtering meeting requests Signup and view all the answers

Which access control mechanism is easier to prevent the problem of a confused deputy?

Capabilities Signup and view all the answers

What is the main disadvantage of using Capabilities as an access control mechanism?

It is more difficult to implement Signup and view all the answers

What is the purpose of a CAPTCHA?

To tell humans and computers apart Signup and view all the answers

What is the main advantage of using ACLs as an access control mechanism?

It is data-oriented Signup and view all the answers

What is the main disadvantage of using ACLs as an access control mechanism?

It is difficult to delegate authority Signup and view all the answers

What is the purpose of a CAPTCHA being 'automated'?

To generate and score tests Signup and view all the answers

What is the purpose of a CAPTCHA being 'public'?

To tell humans and computers apart Signup and view all the answers

What is the purpose of a CAPTCHA being a 'Turing test'?

To tell humans and computers apart Signup and view all the answers

What is the purpose of a CAPTCHA being 'human interactive proof'?

To test the knowledge of users Signup and view all the answers

What is the main challenge with ACLs to avoid the problem of a confused deputy?

Maintaining association between authority and intended purpose Signup and view all the answers

ACLs vs Capabilities

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Questions and Answers

Which type of CAPTCHA is NOT mentioned in the text?

What is the purpose of using CAPTCHA?

What was the original motivation for creating CAPTCHA?

What is the main advantage of a packet filter firewall?

What is the main disadvantage of a stateful packet filter?

What does a firewall do in the context of network security?

What is the purpose of an application proxy firewall?

What is the role of a CAPTCHA in preventing automated sign-ups for email accounts?

What is the main challenge in breaking CAPTCHAs?

What is the analogy used to describe the role of a firewall?

Which access control mechanism is easier to prevent the problem of a confused deputy?

What is the main disadvantage of using Capabilities as an access control mechanism?

What is the purpose of a CAPTCHA?

What is the main advantage of using ACLs as an access control mechanism?

What is the main disadvantage of using ACLs as an access control mechanism?

What is the purpose of a CAPTCHA being 'automated'?

What is the purpose of a CAPTCHA being 'public'?

What is the purpose of a CAPTCHA being a 'Turing test'?

What is the purpose of a CAPTCHA being 'human interactive proof'?

What is the main challenge with ACLs to avoid the problem of a confused deputy?

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