This d4 question of '4.8.2 Network management tools' topic of cisa manual
option A is correct since protocol analyser, analyze network packets, based on protocols like it will analyse http protocol packets , tcp protocol packets etc
CISA candidate should know following:
https://www.infosectrain.com/blog/cisa-domain-4-information-systems-operations-maintenance-and-service-management/
23.Network Management tools:
Response Time – Identify the time necessary for a command entered by users at a terminal to be answered by the host system.
Downtime Reports – Track the availability of telecommunications line and circuits. Interruptions due to power line failure, traffic, overload, operator error or other anomalous conditions are identified in a downtime reports
Online Monitors – Check data transmissions accuracy and errors. Monitoring can be performed be echo checking and status checking all transmissions, ensuring that messages are not lost or transmitted more than one.
Network Monitors – Real time display of network nodes and status.
Protocol Analyzers – It is a diagnostic tool used for monitoring packets flowing within the network.
Simple Network Management Protocol (SNMP) – It is a TCP/IP-based protocol that monitors and controls different variables throughout the network, manages configurations, and collects statistics on performance and security
Help desk reports – It is prepared by the help desk, which is staffed or supported by IT technicians trained to handle problems occurring during normal IS usage....