Harper, a software engineer, is developing an email application. To ensure the confidentiality of email messages. Harper uses a symmetric-key block cipher having a classical 12- or 16-round Feistel network with a block size of 64 bits for encryption, which includes large 8 x 32-bit S-boxes (S1, S2, S3, S4) based on bent functions, modular addition and subtraction, key-dependent rotation, and XOR operations. This cipher also uses a masking key(Km1)and a rotation key (Kr1) for performing its functions. What is the algorithm employed by Harper to secure the email messages?

1. A. CAST-128
2. B. AES
3. C. GOST block cipher
4. D. DES

Correct Answer: A

Security administrator John Smith has noticed abnormal amounts of traffic coming from local computers at night. Upon reviewing, he finds that user data have been exfilltrated by an attacker. AV tools are unable to find any malicious software, and the IDS/IPS has not reported on any non-whitelisted programs, what type of malware did the attacker use to bypass the company's application whitelisting?

1. A. Phishing malware
2. B. Zero-day malware
3. C. File-less malware
4. D. Logic bomb malware

Correct Answer: C
https://www.mcafee.com/enterprise/en-us/security-awareness/ransomware/what-is-fileless-malware.html

Which type of attack attempts to overflow the content-addressable memory (CAM) table in an Ethernet switch?

1. A. Evil twin attack
2. B. DNS cache flooding
3. C. MAC flooding
4. D. DDoS attack

Correct Answer: C

What would be the fastest way to perform content enumeration on a given web server by using the Gobuster tool?

1. A. Performing content enumeration using the bruteforce mode and 10 threads
2. B. Shipping SSL certificate verification
3. C. Performing content enumeration using a wordlist
4. D. Performing content enumeration using the bruteforce mode and random file extensions

Correct Answer: A

What hacking attack is challenge/response authentication used to prevent?

1. A. Replay attacks
2. B. Scanning attacks
3. C. Session hijacking attacks
4. D. Password cracking attacks

Correct Answer: A