Explanation
Stratum 1 devices are the most accurate ntp time sources accessible via a network connection. A Stratum 1 device would normally be synchronised via a Stratum 0 reference clock.
Reference: https://endruntechnologies.com/products/ntp-time-servers/stratum1

Cat 7 is a type of twisted-pair copper cable that supports up to 40 Gbps bandwidth and up to 100 meters cable length. Cat 7 is suitable for long cable runs that require high-speed data transmission. Cat 7 has better shielding and crosstalk prevention than lower categories of cables.
References: Network+ Study Guide Objective 1.5: Compare and contrast network cabling types, features and their purposes.

The technician was identifying the problem by gathering information with this note. This is the first step of the troubleshooting methodology, which is a systematic process of finding and resolving issues in a network or system. By gathering information, the technician can understand the symptoms, scope, and impact of the problem, as well as collect relevant data from various sources, such as users, logs, tools, or documentation.
The note shows that the technician was asking questions to the user, checking the network status and configuration, and reviewing previous tickets to gather information about the problem. References: [CompTIA Network+ Certification Exam Objectives], Troubleshooting Methodology - CompTIA Network+ N10-007 -
1.4 | Professor Messer IT Certification Training Courses

Cat 8 keystones are shielded to prevent interference from external sources, but they also require proper grounding to avoid interference from within the cable. Wrapping the end connections with copper tape before terminating them is one way to ensure a good ground connection and reduce interference. Using passthrough modular crimping plugs, connecting the RX/TX wires to different pins, or running a speed test on a slow device are not relevant or effective steps to troubleshoot the issue.
Reference:
CompTIA Network+ N10-008 Certification Study Guide, page 191
CompTIA Network+ N10-008 Cert Guide, Deluxe Edition, page 362
CAT8 RJ45 Keystone Problem : r/HomeNetworking2
How to Terminate Cat8 Shielded Keystone Jacks3