Computer Networks CSE261 Lecture 9: Security and Privacy

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What is the function of a firewall in a network?

To monitor user activities on the network

To enhance network speed and performance

To provide secure data storage for the network

To control network security and access rules (correct)

Which type of firewall is typically used in companies as stand-alone devices?

Intrusion Detection System (IDS)

Software firewall

Unified Threat Management (UTM)

Hardware firewall (correct)

What is the purpose of a Virtual Private Network (VPN) in the context of network security?

To prevent unauthorized access to LAN resources

To establish secure connections over the Internet (correct)

To optimize network traffic for higher speed

To encrypt data stored on local servers

What is the function of Cryptography in the context of security systems?

To secure communication by converting data into a secret code Signup and view all the answers

What is the main purpose of Steganography in network security?

To conceal secret information within other non-secret data Signup and view all the answers

What is the main purpose of Steganography?

To embed original secret messages inside a particular cover media Signup and view all the answers

What does VPN use to retain privacy while accessing outside resources?

Encryption and security protocols Signup and view all the answers

What is the problem with Secret Key Cryptography (SKC)?

The encrypted message is obvious and known that it is encrypted Signup and view all the answers

What is the technique used to separate a local area network (LAN) from untrusted networks and the internet?

Demilitarized Zone (DMZ) Signup and view all the answers

What is steganalysis?

A technique used to detect whether a media contains a hidden message or not Signup and view all the answers

What is the main function of a firewall in a network?

To monitor and control network traffic based on predetermined security rules Signup and view all the answers

What is the main purpose of Cryptography in the context of security systems?

To protect data by converting it into a secure format for transmission Signup and view all the answers

Which type of firewall is typically used in companies as stand-alone devices?

Hardware firewall Signup and view all the answers

What is the most common use of Steganography in the context of security?

To hide secret messages or information within other non-secret data Signup and view all the answers

What is the technique used to separate a local area network (LAN) from untrusted networks and the internet?

Firewall Signup and view all the answers

What does a Virtual Private Network (VPN) use to retain privacy while accessing outside resources?

Encrypted tunnels Signup and view all the answers

What is the main purpose of a Virtual Private Network (VPN) in the context of network security?

To encrypt data/info and retain privacy while accessing outside resources Signup and view all the answers

What is the purpose of Steganography in network security?

To transmit hidden message embedded in a cover medium that an unauthorized person cannot extract Signup and view all the answers

What is the function of Cryptography in the context of security systems?

To encrypt data/info and retain privacy while accessing outside resources Signup and view all the answers

What is Secret Key Cryptography's (SKC) problem?

The encrypted message is obvious and everyone knows that the message is encrypted Signup and view all the answers

What does Steganalysis refer to in the context of network security?

A technique to detect the presence of a hidden message in a multimedia/cover to extract it Signup and view all the answers

What is the main function of Demilitarized Zone (DMZ) in network security?

To separate a local area network (LAN) from untrusted networks and the internet Signup and view all the answers

What is the purpose of Steganos (as mentioned in the text)?

To hide secret messages inside a particular cover media Signup and view all the answers

What does Steganography mean?

The technique of encryption data/info via mixing it with a key to be protected for an unauthorized person to access these data Signup and view all the answers

What is the main purpose of Cryptography applications?

To encrypt data/info and retain privacy while accessing outside resources Signup and view all the answers

What does Public Key Cryptography (PKC) use for encryption and decryption?

Uses one key for encryption and other key for decryption Signup and view all the answers

Computer Networks CSE261 Lecture 9: Security and Privacy

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Questions and Answers

What is the function of a firewall in a network?

Which type of firewall is typically used in companies as stand-alone devices?

What is the purpose of a Virtual Private Network (VPN) in the context of network security?

What is the function of Cryptography in the context of security systems?

What is the main purpose of Steganography in network security?

What is the main purpose of Steganography?

What does VPN use to retain privacy while accessing outside resources?

What is the problem with Secret Key Cryptography (SKC)?

What is the technique used to separate a local area network (LAN) from untrusted networks and the internet?

What is steganalysis?

What is the main function of a firewall in a network?

What is the main purpose of Cryptography in the context of security systems?

Which type of firewall is typically used in companies as stand-alone devices?

What is the most common use of Steganography in the context of security?

What is the technique used to separate a local area network (LAN) from untrusted networks and the internet?

What does a Virtual Private Network (VPN) use to retain privacy while accessing outside resources?

What is the main purpose of a Virtual Private Network (VPN) in the context of network security?

What is the purpose of Steganography in network security?

What is the function of Cryptography in the context of security systems?

What is Secret Key Cryptography's (SKC) problem?

What does Steganalysis refer to in the context of network security?

What is the main function of Demilitarized Zone (DMZ) in network security?

What is the purpose of Steganos (as mentioned in the text)?

What does Steganography mean?

What is the main purpose of Cryptography applications?

What does Public Key Cryptography (PKC) use for encryption and decryption?

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