Multimode fiber optic cables use multiple paths of light that bounce off the cladding, which is a layer of glass or plastic that surrounds the core of the cable.
https://www.explainthatstuff.com/fiberoptics.html

EIGRP stands for Enhanced Interior Gateway Routing Protocol, which is a hybrid routing protocol that uses a successor and a feasible successor to determine the best route to a destination. A successor is the next-hop router that has the lowest cost (or metric) to reach the destination, and a feasible successor is a backup router that has a cost that is less than the cost of the successor. EIGRP uses the successor and the feasible successor to achieve fast convergence and load balancing. EIGRP also uses a Diffusing Update Algorithm (DUAL) to maintain the routing table and avoid routing loops. IS-IS, OSPF, and BGP are other routing protocols that do not use a successor and a feasible successor, but rather use different algorithms and criteria to select the best route.
References
* 1: EIGRP - N10-008 CompTIA Network+ : 2.1
* 2: CompTIA Network+ N10-008 Certification Study Guide, page 150-151
* 3: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 20
* 4: CompTIA Network+ N10-008 Certification Practice Test, question 9

To locate a device's network port on a switch, a technician should review the switch's MAC address table. The MAC address table maintains a list of MAC addresses of devices connected to each port on the switch. By checking the MAC address of the device in question, the technician can identify the port to which the device is connected.
References: CompTIA Network+ Certification Study Guide, Sixth Edition by Glen E. Clarke

This answer will help the organization to avoid expending resources on identifying non-relevant events, as the
404 errors on image files are not indicative of any security threat or issue, but rather a misconfiguration or a broken link on the web server. The 404 errors on image files are also very frequent and repetitive, as shown by the web server log, which can clutter the log and make it harder to spot any relevant events. By filtering out these errors, the analyst can focus on more important events and reduce the noise in the log.
The other answers are not as good as A, because they either do not address the problem of identifying non-relevant events, or they are based on incorrect assumptions or information. For example:
* B. Updating firewall rules to block 202.180.155.1 is not a good answer, because the IP address
202.180.155.1 is not doing anything malicious or suspicious, but rather requesting image files that do not exist on the web server. Blocking this IP address will not improve the security of the web server, but rather create unnecessary firewall rules and possibly deny legitimate access to the web server.
* C. Resyncing the network time server and monitoring logs for future anomalous behavior is not a good answer, because there is no evidence that the network time server is out of sync or causing any problems. The web server log shows that the entries are all within a few minutes of each other, which is normal and expected. Resyncing the network time server will not help the analyst to identify non-relevant events, but rather waste time and resources on an unrelated task.
* D. Checking with the penetration testing team to see if the team ran any scans on January 14, 2021 is not
* a good answer, because the web server log does not show any signs of a penetration test or a scan. The log shows only 404 errors on image files, which are not typical of a penetration test or a scan, which would usually target different types of files, ports, or vulnerabilities. Checking with the penetration testing team will not help the analyst to identify non-relevant events, but rather distract the analyst from the actual events and possibly create false alarms.
https://www.professormesser.com/network-plus/n10-008/n10-008-video/general-network-troubleshooting-n10-0

A basic service set (BSS) is a group of wireless devices that share the same service set identifier (SSID) and communicate with each other through a single access point (AP). A BSS is also known as an infrastructure mode network1.
An extended service set (ESS) is a group of two or more BSSs that are connected by a distribution system (DS), such as a switch or a router. An ESS allows wireless devices to roam between different APs and maintain network connectivity. An ESS is also known as a wireless LAN (WLAN)2.
An independent basic service set (IBSS) is a group of wireless devices that communicate with each other directly without using an AP or a DS. An IBSS is also known as an ad hoc network or a peer-to-peer network3.
MU-MIMO (Multi-User Multiple-Input Multiple-Output) is a technology that allows an AP to transmit data to multiple wireless devices simultaneously using multiple antennas and spatial streams. MU-MIMO can improve the network efficiency and performance by reducing the waiting time and increasing the throughput4.
The scenario described in the question is an example of an IBSS, as the two laptops are connected directly to each other using 802.11ac without an AP. Therefore, the correct answer is C.
Reference:
1: BSS
2: ESS
3: IBSS
4: MU-MIMO