A Secure Sockets Layer (SSL) virtual private network (VPN) would provide the network administrator who requires remote access a secure and reliable method of accessing the system over the Internet. Security Assertion Markup Language (SAML) standards for federation will provide cross-web service authentication and authorization.

The exhibit displays logs that are indicative of an active fraggle attack. A Fraggle attack is similar to a smurf attack in that it is a denial of service attack, but the difference is that a fraggle attack makes use of ICMP and UDP ports 7 and 19. Thus when the senior engineer uses a network analyzer to identify the attack he should contact the company's ISP to block those malicious packets.
Incorrect Answers:
B: The logs are indicative of an ongoing fraggle attack. Even though a fraggle attack id also a DOS attack the best form of action to take would be to ask the ISP to block the malicious packets.
C: Configuring a sinkhole to block a denial of service attack will not address the problem since the type of attack as per the logs indicates a fraggle attack.
D: A smurf attack spoofs the source address with the address of the victim, and then sends it out as a broadcast ping. Each system in the network will then respond, and flood the victim with echo replies. The logs do not indicate a smurf attack.
References:
Gregg, Michael, and Billy Haines, CASP CompTIA Advanced Security Practitioner Study Guide, John Wiley & Sons, Indianapolis, 2012, pp. 165, 168
https://en.wikipedia.org/wiki/Fraggle_attack