D334: SIMPLIFIED QUESTIONS AND CERTIFIED ANSWERS
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Public Key Infrastructure (PKI) & Certificates
Q: Which key signs a certificate issued to a business by a trusted third party?
A: The private key of the root Certificate Authority (CA)
Q: Which key should a business send to customers to prove its identity?
A: The public key of the company
Q: Which PKI component generates digital certificates?
A: Certificate Authority (CA)
Q: Which PKI component validates integrity and authenticity of data?
A: Digital signature
Q: Which field shows the hash of an X.509 certificate?
A: Thumbprint
Q: Which algorithm generates a certificate thumbprint?
A: SHA-1
Q: Which certificate management process involves key recovery?
A: Issued
Q: What must a root CA do before publishing its own certificate?
A: Sign it with its private key
Q: What format is used to import/export X.509 certificates and private keys?
A: PKCS #12
Asymmetric & Symmetric Encryption
Q: In asymmetric encryption, which key encrypts data and which decrypts it?
A: Public key encrypts, private key decrypts
Q: When large volumes of data must be encrypted efficiently, what method is used?
A: Encrypt with symmetric keys, distribute keys using asymmetric encryption
, Q: What does a recipient use to decrypt a message sent using their public key?
A: Their private key
Q: Which two components are known before symmetric encryption? (Choose 2)
A: Cryptographic algorithm, Cryptographic key
Q: Which operation uses the same key for encryption and decryption?
A: Symmetric encryption
Q: Why is asymmetric encryption used to send symmetric keys?
A: It securely encrypts small data using a public/private key pair
Wireless Security Protocols
Q: What is the maximum key length used by WEP?
A: 40 bits
Q: Which cipher does WEP use?
A: RC4
Q: What improves WPA security over WEP using TKIP?
A: Hashing the initialization vector (IV) with the secret key
Q: What distinguishes WPA-Enterprise from WPA-Personal?
A: Support for an authentication server
Q: Which wireless standard uses a 128-bit RC4 stream cipher?
A: WPA
VPN & IPsec
Q: Which port must be open for IPsec key exchange (IKE)?
A: UDP 500
Q: Which IP protocol number indicates Authentication Header (AH)?
A: 51
Q: Where can encrypted IPsec ESP tunnel traffic be inspected?
A: At both endpoints (headquarters and remote site)
Encryption Modes
NOW AVAILABLE >>BRANDNEW<< GUARANTEED 100%
PASS A+ GRADE
Public Key Infrastructure (PKI) & Certificates
Q: Which key signs a certificate issued to a business by a trusted third party?
A: The private key of the root Certificate Authority (CA)
Q: Which key should a business send to customers to prove its identity?
A: The public key of the company
Q: Which PKI component generates digital certificates?
A: Certificate Authority (CA)
Q: Which PKI component validates integrity and authenticity of data?
A: Digital signature
Q: Which field shows the hash of an X.509 certificate?
A: Thumbprint
Q: Which algorithm generates a certificate thumbprint?
A: SHA-1
Q: Which certificate management process involves key recovery?
A: Issued
Q: What must a root CA do before publishing its own certificate?
A: Sign it with its private key
Q: What format is used to import/export X.509 certificates and private keys?
A: PKCS #12
Asymmetric & Symmetric Encryption
Q: In asymmetric encryption, which key encrypts data and which decrypts it?
A: Public key encrypts, private key decrypts
Q: When large volumes of data must be encrypted efficiently, what method is used?
A: Encrypt with symmetric keys, distribute keys using asymmetric encryption
, Q: What does a recipient use to decrypt a message sent using their public key?
A: Their private key
Q: Which two components are known before symmetric encryption? (Choose 2)
A: Cryptographic algorithm, Cryptographic key
Q: Which operation uses the same key for encryption and decryption?
A: Symmetric encryption
Q: Why is asymmetric encryption used to send symmetric keys?
A: It securely encrypts small data using a public/private key pair
Wireless Security Protocols
Q: What is the maximum key length used by WEP?
A: 40 bits
Q: Which cipher does WEP use?
A: RC4
Q: What improves WPA security over WEP using TKIP?
A: Hashing the initialization vector (IV) with the secret key
Q: What distinguishes WPA-Enterprise from WPA-Personal?
A: Support for an authentication server
Q: Which wireless standard uses a 128-bit RC4 stream cipher?
A: WPA
VPN & IPsec
Q: Which port must be open for IPsec key exchange (IKE)?
A: UDP 500
Q: Which IP protocol number indicates Authentication Header (AH)?
A: 51
Q: Where can encrypted IPsec ESP tunnel traffic be inspected?
A: At both endpoints (headquarters and remote site)
Encryption Modes
