MAU Architecture and NIC Functionality

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Questions and Answers

What is the primary function of the NIC?

  • To control the Avionics Standard-Communication Bus
  • To manage the Backplane Interface Controller
  • To transmit and receive ASCB and LAN data (correct)
  • To program the Aircraft Personality Modules

What type of memory is used in the BIC frame buffer?

  • SRAM (Static Random Access Memory)
  • EPROM (Erasable Programmable Read-Only Memory)
  • ROM (Read-Only Memory)
  • Dualport RAM (Random Access Memory) (correct)

What type of data is programmed into the Aircraft Personality Modules?

  • Custom data for the aircraft (correct)
  • Controller Area Network data
  • ASCB and LAN data
  • System identification data only

What is the purpose of the software firewalls in the MAU?

<p>To protect the MAU from malicious data (B)</p>
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What is the function of the ASCB coupler?

<p>To connect the ASCB to the NIC (B)</p>
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What is the name of the bus that connects client modules to the backplane bus?

<p>Bus Interface Controller (BIC) (C)</p>
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What is the primary purpose of an ASCB terminator?

<p>To absorb signals so that they do not reflect back down the line (A)</p>
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What is the primary function of the NIC in a Local Area Network?

<p>To control data transmission on the LAN bus (D)</p>
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What type of cable is used in the LAN?

<p>Thin coaxial cable (A)</p>
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What is the primary use of the Local Area Network (LAN) in an aircraft?

<p>For development, maintenance, and software loading (A)</p>
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What is the frequency of operation of the Controller Area Network (CAN) bus?

<p>500 kHz (B)</p>
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What protocol is used in the Local Area Network (LAN)?

<p>TCP/IP (D)</p>
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What is a characteristic of the CAN bus network?

<p>No master controls when individual nodes have access to read and write data. (B)</p>
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What is labeled with a unique arbitration ID in a CAN frame?

<p>The frame itself (A)</p>
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What happens when multiple nodes try to transmit a message onto the CAN bus at the same time?

<p>The node with the highest arbitration ID gets bus access. (D)</p>
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What is a feature of the CAN specification?

<p>A method of error checking on each frame's contents. (D)</p>
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What is the construction of the CAN bus network?

<p>Twisted, shielded pair with terminators. (D)</p>
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What happens to lower priority nodes when multiple nodes try to transmit a message onto the CAN bus at the same time?

<p>They wait until the bus becomes available before trying to transmit again. (C)</p>
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What is the primary purpose of the AIOP modules?

<p>To collect data from avionic and flight control systems (C)</p>
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How do the AIOP modules communicate with the servos?

<p>Through a bidirectional CAN data bus (A)</p>
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What is the purpose of the Linear Variable Differential Transformers (LVDTs)?

<p>To provide analogue feedback to the Primary Actuator Control Electronics (P-ACE) System (C)</p>
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How many AIOP modules operate in each channel?

<p>Two (A)</p>
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What is the function of the Flight Guidance Control System (FGCS)?

<p>To provide yaw damper and turn coordination signals (D)</p>
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What is the purpose of the CAN bus interface in the Flight Control Modules (FCMs)?

<p>To transmit digital feedback data to the AIOP modules (B)</p>
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What is the primary advantage of the AFDX technology?

<p>Secure and reliable communications (C)</p>
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What is the function of the AFDX switches?

<p>To manage data traffic on the network (D)</p>
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What is the characteristic of the AFDX cable?

<p>It is a full-duplex physical link (B)</p>
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What is the composition of the AFDX cable?

<p>Four wires, two pairs for transmission and reception (C)</p>
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What is the significance of the term 'full-duplex' in the context of AFDX cable?

<p>The subscriber can simultaneously transmit and receive data (A)</p>
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What is the data rate of the AFDX technology?

<p>10 Mb/s and 100 Mb/s (D)</p>
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