Communication and Networking Systems Flashcards
7 cards from real EVITP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Communication and Networking Systems flashcards as text
What is the primary purpose of smart charging or 'managed charging' in EVSE networks?
Answer: Optimize charging based on grid conditions, pricing, and user preferences
Smart charging optimizes when and how fast EVs charge by responding to grid demand signals, electricity pricing, and user schedules to reduce costs and grid stress.
Which communication technology is used in the Combined Charging System (CCS) for data exchange between the EV and EVSE over the charging cable itself?
Answer: Power Line Communication (PLC)
CCS uses Power Line Communication (PLC) to transmit data signals over the same conductors that carry the charging power, enabling communication without a separate data wire.
What does CSMS stand for in EVSE network architecture?
Answer: Charging Station Management System
CSMS stands for Charging Station Management System, the centralized platform that communicates with and manages a fleet of EV charging stations via OCPP.
What is the purpose of the 'heartbeat' message in the OCPP protocol?
Answer: To confirm the charging station is online and maintain its connection to the central system
The heartbeat message is sent periodically by the charging station to the central system to confirm it is still connected and operational, similar to a keep-alive signal.
Which driver authentication method does OCPP natively support at the EVSE?
Answer: RFID card identification
OCPP natively supports RFID card identification as the primary driver authentication method, where the driver presents an RFID card to start a session.
Which framework is most commonly referenced for cybersecurity requirements in U.S. EV charging infrastructure?
Answer: NIST Cybersecurity Framework
The NIST Cybersecurity Framework provides guidelines for managing cybersecurity risks and is the primary reference for securing U.S. EV charging infrastructure and critical systems.
What is demand response in the context of EV charging networks?
Answer: Adjusting EV charging rates in response to utility grid signals to balance electrical load
Demand response allows utilities to send signals to EVSE networks to reduce or shift charging load during peak grid periods, helping stabilize the electrical grid.