多項選擇題

Which two steps does a receiver perform to validate a message using HMAC？（）

A. decrypts the received MAC using a secret key
B. compares the computed MAC vs. the MAC received
C. authenticate the receivedmessage using the sender’s public key
D. look up the sender’s public key
E. extracts the MAC from the receivedmessage thenencrypts the received message with a secret keyto producethe MAC
F. Computes the MAC using the receivedmessage and a secret key as inputs to the hash function

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單項選擇題

Which of the following best describes a hash function？（）

A.An irreversible fast encryption method
B.A reversible fast encryption method
C.A reversible value computed from a piece of data and used to detect modifications
D.An irreversible value computed froma piece of data and used to detect modifications
E.A table inwhich values are stored for efficient retrieval.

單項選擇題

What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）

A. enables IOS to copy the ToS field from the inner （original） IPheader to theouter tunnel IP header
B. enables IOS to make a copy of the inner （original） IP header and to run a QoS classification before encryption， based on fields in the inner IP header.
C. enables IOS to classify packets based on the ToS field in the inner （original） IP header
D. enables IOS to classify packets based on the ToS field in the outer tunnel IP header
E. enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity

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Which two steps does a receiver perform to validate a message using HMAC？ （）

你可能感興趣的試題

Which of the following best describes a hash function？（）

What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）

Which two steps does a receiver perform to validate a message using HMAC？（）

Which of the following best describes a hash function？（）