Buses Topologies, Protocols, and the OSI model Flashcards
Framing and error correction format of data transfer, flow control use
Data link Layer 2
Channel for transfer of messages of one application process to another. Packet or frame accounting, improving reliability
Transport Layer 4
Optimum routing of messaging from one network to another
Network Layer 3
File transfer, message exchange, program use
Application Layer 7
Data format, encryption, compression of data
Presentation Layer 6
Organization, synchronization of same protocol applications between nodes
Session Layer 5
Electrical and mechanical definition of the system, cables, voltages, etc
Physical Layer 1
best describes protocol with respect to communication
A series of convention or standards that control or enable connections between two endpoints
Character based flow control technique used in ASCII communication
XON/XOFF
TCP/IP was originally invented/funded by
The United States Department of Defence
The digital data using Analog signaling, data transmission method is associated with
HART and telephone modems
The Analog data using Analog signaling, data transmission method is associated with
4-20 mA current loop and AM/FM radio
CSMA/CD is an acronym that stands for
Carrier Sense Multiple Access/Collision Detection
Communication arbitration is how each node shares the same network. - NOT a communication arbitration method
Point to Point
NOT a sensor level protocol
HART
NOT a device level protocol
LON
The HART baud rate, “1” bit frequency and “0” bit frequency, restively is
1200bps, 1200 Hz, 2200 Hz
A major advantage Foundation Fieldbus provides is
Peer to Peer communication
The communication speed of an H1, Foundation Fieldbus segment is
31.25 Kbps
AS-I but protocol allows for fast update rates from the combination of
167 KBaud, cyclic polling, limit of 31 slaves, 4 devices/per slave maximum
Fieldbus protocol that uses Manchester encoding
Profibus
When we transmit an Ethernet message, what OSI layer does TCP/IP come into
Transport Layer 4
control Network protocol uses category 5e cabling for communications?
Foundation Fieldbus HSE
Layer of the OSI model, handles framing and error correction, formatting of data, data transfer, flow control use, bus arbitration?
Layer 2-Datalink
Layer of the OSI model, establishes the connection of two computers and manages their “meeting” over the internet?
Layer 3-Network
NOT a characteristic of Device protocols
Functions are digital in nature, towards process sensing and manipulation
Fundamental difference of Foundation Fieldbus-H1 compared to other device level protocols
Ability for the devices to process the algorithm
Who invented the HART protocol?
Rosemount Measurement
Proprietary protocol is a “for the good of all” protocol whose software code is shared by all members, and therefore members typically find solutions for all issues as a collective
False
An open source protocol is one whose software code is kept secret by the software developer and sold to application users
False
TCP/IP doesn’t come into play until the need to traverse differing networks begins
True
The advantage of FTP, is that it allows for many physically different networks, to be linked together, providing flexibility, regardless of differing physical and data link layers
False
The Unix or Linux operating system is an open source type operating system.
True
Many physically different networks, are capable of utilizing TCP/IP, providing flexibility, regardless of differing OSI layers 1 and 2
True
A proprietary protocol is one whose software code is kept secret by the software developer and sold to application users
True
Manchester encoding utilizes positive edge and negative edge encoding for 1s and 0s respectively
True
Manchester encoding provides its own baud rate detection, by way of its waveform structure or characteristics
True
A Ring network topology requires end-of-line resistors
False
Device Networks focus on providing extra data from process instrumentation
True
Sensor Networks, focus on providing data for IT applications, email, internet, SAP (single assess point), Microsoft Office Suite
False
Frame collisions increase network bandwidth
False
Device type Protocol functions, are analog in nature towards process control sensing and manipulation
True
Foundation Fieldbus uses Manchester encoding as its bit arbitration method
True
Control Network support multiple masters which allows peer to peer, client/server, publisher/subscriber communication techniques
True
Asynchronous communication is often used with NRZ encoding
True
Phase shift keying varies the phase angle of the transmitted signal to encode data, and incorporates what is known as a “dibit” from each sine waveform
True
The CAN bus arbitration method, or who gets to talk on the network, looks for the first dominant node to communicate a 0 to 1 transition in the arbitration message
False
Highway Addressable Remote transducer is the full name of HART protocol
True
Modicon was the developer of the DeviceNet protocol
False
