7191305
Descripción
Test por Anthony Schulmeister, actualizado hace más de 1 año
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Creado por Anthony Schulmeister
hace casi 8 años
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Pregunta 1
Pregunta
What are two symmetric encryption algorithms? (Choose two.)
Respuesta
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3DES
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MD5
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AES
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HMAC
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SHA
Pregunta 2
Pregunta
What is the reason for HMAC to use an additional secret key as input to the hash function?
Respuesta
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to provide encryption
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to provide authentication
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to provide integrity verification
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to prevent DoS attacks
Pregunta 3
Pregunta
If an asymmetric algorithm uses a public key to encrypt data, what is used to decrypt it?
Respuesta
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DH
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a private key
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the same public key
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a different public key
Pregunta 4
Pregunta
What is a difference between symmetric and asymmetric encryption algorithms?
Respuesta
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Symmetric algorithms are typically hundreds to thousands of times slower than asymmetric algorithms.
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Symmetric encryption algorithms are used to authenticate secure communications. Asymmetric encryption algorithms are used to repudiate messages.
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Symmetric encryption algorithms are used to encrypt data. Asymmetric encryption algorithms are used to decrypt data.
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Symmetric encryption algorithms use pre-shared keys. Asymmetric encryption algorithms use different keys to encrypt and decrypt data.
Pregunta 5
Pregunta
What is the purpose of the DH algorithm?
Respuesta
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to provide nonrepudiation support
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to support email data confidentiality
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to encrypt data traffic after a VPN is established
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to generate a shared key over an unsecured channel before data communications
Pregunta 6
Pregunta
Which requirement of secure communications is ensured by the implementation of MD5 or SHA hash algorithm?
Respuesta
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confidentiality
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authentication
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integrity
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nonrepudiation
Pregunta 7
Pregunta
What is missing in the AH VPN?
Respuesta
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confidentiality
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integrity
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authentication
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secure key exchange
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DH
Pregunta 8
Pregunta
Which IPsec security function provides assurance that the data received via a VPN has not been modified in transit?
Respuesta
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confidentiality
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integrity
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authentication
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secure key exchange
Pregunta 9
Pregunta
Which IPsec framework protocol provides data integrity and data authentication, but does not provide data confidentiality?
Respuesta
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AH
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IP protocol 50
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ESP
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DH
Pregunta 10
Pregunta
The use of 3DES within the IPsec framework is an example of which of the five IPsec building blocks?
Respuesta
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authentication
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confidentiality
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Diffie-Hellman
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integrity
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nonrepudiation
Pregunta 11
Pregunta
Refer to exhibit above. The site-to-site VPN is configured correctly between R1 and R3 for the communications from PC-A to PC-C. When PC-A sends out traffic to PC-C, what item in the following will be sent in plain text? (Choose the most likely one.)
Respuesta
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The PC-A’s IP address
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The PC-C’s IP address
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The data inside the IP packet
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The R1’s s0/0/1’s IP address
Pregunta 12
Pregunta
Which statement describes the effect of key length in deterring an attacker from hacking through an encryption key?
Respuesta
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The length of a key will not vary between encryption algorithms.
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The length of a key does not affect the degree of security.
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The shorter the key, the harder it is to break.
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The longer the key, the more key possibilities exist.
Pregunta 13
Pregunta
Which statement describes a VPN?
Respuesta
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VPNs use dedicated physical connections to transfer data between remote users.
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VPNs use logical connections to create public networks through the Internet.
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VPNs use open source virtualization software to create the tunnel through the Internet.
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VPNs use virtual connections to create a private network through a public network.
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