A. 검증 보호

B. 자기 보호

C. 강제 보호

D. 수동 보호

A. IP spoofing attack

B. Smurf attack

C. ICMP attack

D. MAC address spoofing attack

A. It is the data obtained by the sender after calculating the plaintext information through the HASH algorithm.

B. Digital fingerprints are also known as information digests.

C. The receiver will use the sender's public key to calculate the generated data fingerprint and compare it with the received digital fingerprint.

D. The receiver needs to use the sender's public key to unlock the digital signature to obtain the digital fingerprint.

A. Untrustarea

B. Securityarea

C. Zonearea

D. Trustarea

A. True

B. False