Page 1 of 133
Vehicle Communication System Exam
Questions and Answers| 2026/27Updated
Q1. Which company originally developed the Controller Area
Network (CAN) protocol?
A) Siemens
B) Motorola
C) Bosch
D) Intel
✅ Answer: C) Bosch
🧠 Rationale: CAN was developed by Robert Bosch GmbH in
the 1980s and officially released in 1986 for in-vehicle
communication between electronic control units (ECUs) without a
host computer.
,Page 2 of 133
Q2. What does CAN stand for in automotive diagnostics?
A) Computer Area Network
B) Controller Area Network
C) Communication Area Network
D) Control Area Network
✅ Answer: B) Controller Area Network
🧠 Rationale: CAN is the acronym for Controller Area Network,
a robust vehicle bus standard that allows microcontrollers and
devices to communicate without a host computer.
Q3. What is the primary goal of layered in-vehicle networks in a
Software-Defined Vehicle (SDV) architecture?
A) To rely on a single high-speed network for all vehicle
functions
,Page 3 of 133
B) To fit all control modules into one monolithic ECU
C) To balance cost, determinism, bandwidth, and complexity
so multiple network technologies can coexist
D) To eliminate all legacy buses like CAN and LIN
✅ Answer: C) To balance cost, determinism, bandwidth, and
complexity so multiple network technologies can coexist
🧠 Rationale: SDV architectures build a layered network fabric
where CAN/LIN handle cost-effective distributed control tasks
while Automotive Ethernet serves as a high-bandwidth,
IP-backbone.
Q4. In automotive network classification, which bus system is the
typical representative of a Class A network (low-speed,
<10 kbit/s)?
A) CAN Bus
, Page 4 of 133
B) LIN Bus
C) MOST Bus
D) FlexRay Bus
✅ Answer: B) LIN Bus
🧠 Rationale: Class A networks are low-speed, low-cost systems
for body electronics (window lifts, seat controls). LIN is the classic
Class A example.
Q5. Which vehicle network protocol uses fiber optic cables as its
primary transmission medium?
A) CAN
B) LIN
C) MOST
D) FlexRay
Vehicle Communication System Exam
Questions and Answers| 2026/27Updated
Q1. Which company originally developed the Controller Area
Network (CAN) protocol?
A) Siemens
B) Motorola
C) Bosch
D) Intel
✅ Answer: C) Bosch
🧠 Rationale: CAN was developed by Robert Bosch GmbH in
the 1980s and officially released in 1986 for in-vehicle
communication between electronic control units (ECUs) without a
host computer.
,Page 2 of 133
Q2. What does CAN stand for in automotive diagnostics?
A) Computer Area Network
B) Controller Area Network
C) Communication Area Network
D) Control Area Network
✅ Answer: B) Controller Area Network
🧠 Rationale: CAN is the acronym for Controller Area Network,
a robust vehicle bus standard that allows microcontrollers and
devices to communicate without a host computer.
Q3. What is the primary goal of layered in-vehicle networks in a
Software-Defined Vehicle (SDV) architecture?
A) To rely on a single high-speed network for all vehicle
functions
,Page 3 of 133
B) To fit all control modules into one monolithic ECU
C) To balance cost, determinism, bandwidth, and complexity
so multiple network technologies can coexist
D) To eliminate all legacy buses like CAN and LIN
✅ Answer: C) To balance cost, determinism, bandwidth, and
complexity so multiple network technologies can coexist
🧠 Rationale: SDV architectures build a layered network fabric
where CAN/LIN handle cost-effective distributed control tasks
while Automotive Ethernet serves as a high-bandwidth,
IP-backbone.
Q4. In automotive network classification, which bus system is the
typical representative of a Class A network (low-speed,
<10 kbit/s)?
A) CAN Bus
, Page 4 of 133
B) LIN Bus
C) MOST Bus
D) FlexRay Bus
✅ Answer: B) LIN Bus
🧠 Rationale: Class A networks are low-speed, low-cost systems
for body electronics (window lifts, seat controls). LIN is the classic
Class A example.
Q5. Which vehicle network protocol uses fiber optic cables as its
primary transmission medium?
A) CAN
B) LIN
C) MOST
D) FlexRay
