AET Data Bus Systems and Protocols 2

Question 1

Which protocol architecture is used by MIL-STD-1553?

Accepted Answer

Command/response with time division multiplexing

Answer

Unidirectional broadcast

Answer

Carrier-sense multiple access (CSMA)

Answer

Token-passing ring

Question 2

What is the fixed data transfer rate of MIL-STD-1553?

Accepted Answer

1 Mbps

Answer

100 kbps

Answer

10 Mbps

Answer

100 Mbps

Question 3

How many Remote Terminals (RTs) can be addressed on a single MIL-STD-1553 bus?

Accepted Answer

31

Answer

16

Answer

64

Answer

128

Question 4

What is the role of a Bus Monitor (BM) in a MIL-STD-1553 system?

Accepted Answer

Passively records all bus traffic without transmitting

Answer

Issues commands to Remote Terminals

Answer

Acts as a standby Bus Controller

Answer

Arbitrates access conflicts between RTs

Question 5

ARINC 664 Part 7 (AFDX) is derived from which commercial networking standard?

Accepted Answer

Switched Ethernet (IEEE 802.3)

Answer

Token Ring (IEEE 802.5)

Answer

ATM (Asynchronous Transfer Mode)

Answer

FDDI (Fiber Distributed Data Interface)

Question 6

What AFDX mechanism ensures deterministic, guaranteed bandwidth for each avionics data stream?

Accepted Answer

Virtual Links with Bandwidth Allocation Gaps (BAGs)

Answer

Token passing protocol

Answer

Priority queuing with preemption

Answer

Quality-of-Service DSCP marking

Question 7

Which signal encoding scheme does MIL-STD-1553 use?

Accepted Answer

Manchester II Biphase

Answer

Bipolar Return to Zero (BPRZ)

Answer

Non-Return to Zero Level (NRZ-L)

Answer

8B/10B encoding