300-220 CBRTHD: Conducting Threat Hunting and Defending using Cisco Technologies for Cybersecurity

Refer to the exhibit.

A security engineer uses Wireshark to observe Link-Local Multicast Name Resolution (LLMNR) and NetBIOS Name Service traffic that could spoof a name-resolution source, forcing communication with an adversary-controlled system and enabling an SMB Relay attack. After identifying the traffic as malicious, the security engineer must determine the gaps in threat detection.

Which gap would an analyst identify?