Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BuildingAutoInterQ5
homework questions
| Question | Answer |
|---|---|
| What is the intent of BACnet when it states that the path or chain of segments connected by routers can never be circular? | There can only be one route between any two nodes |
| Which LAN type is unique to BACnet? | MS/TP and PTP |
| What is the top speed of MS/TP? | 76,800 bit/s |
| Which of the following is not a baud rate that MS/TP nodes are required to support? | 300 bit/s |
| Biasing is the connection, at a transceiver, of network conductors to the reference voltage and ground through pull-up and pull-down resistors. | True |
| Which of the following is a type of node biasing allowed by the BACnet Standard? | Biased node, Locally biased node, and Unbiased node |
| A ____ node provides bias for the entire network by using resistors with relatively low values. | biased |
| A(n) ____ node has no pull-up/pull-down resistors and depends on common network biasing. | unbiased |
| A(n) ____ node uses resistors with relatively high values that are sufficient to bias the node itself but are too weak to provide bias for the entire segment. | locally biased |
| The ____ frame includes an 8-octet preamble and start-of-frame delimiter (SFD) field to mark the beginning of the frame. | Ethernet 8802-3 |
| What is the FCS used for in an 8802-3 frame? | To detect errors in the frame caused by noise and collisions |
| A payload length value of ____ or larger indicates that the frame is an Ethernet version 2 frame. | 0x0600 |
| A(n) ____ frame includes a 6-bit preamble field and a 1-octet start-of-header (SOH) field. | ARCNET |
| What two forms of ARCNET are used in building automation? | ANSI/ATA-878.1 (2.5 Mbit/s) ARCNET 156K (156 kbit/s) |
| What standard IP component does BACnet/IP use in order to transmit messages over IP? | User Datagram Protocol (UDP) |
| What do BACnet/IP addresses consist of? | The IP address and the UDP port number |
| A ____ shows each possible state and describes the conditions that govern the transition from one state to the next. | state diagram |
| How many master nodes are allowed with MS/TP? | 128 |
| What type of MS/TP node cannot participate in token management or recovery? | Slave node |
| What type of MS/TP master node acts on behalf of slave nodes on its segment for dynamic device binding? | Slave proxy |
| The special DNET address _____ is a global broadcast, which is sent to all BACnet network segments. | 0xFFFF |
| The number of segments that a message is allowed to traverse before reaching its destination is called ____ | hop count |
| What type of router bridges non-routed messages at the data link layer? | Bridging router |
| What type of router bridges segments across IP boundaries by encapsulating the BACnet messages into UDP/IP packets? | Tunnel router |
| When multiple segments are isolated by IP routers instead of BACnet 8802-3 nodes, it is much easier to use nodes that support ____ | BACnet/IP |
| What type of BACnet device embeds broadcast messages into unicast messages and sends them to a peer device for further distribution? | BACnet broadcast management device (BBMD) |
| What technique allows a BACnet/IP node to register with a central BBMD for the purpose of sending and receiving broadcast messages? | Foreign device registration |
| Network address translation (NAT) is a technique that changes source and destination IP addresses, as well as TCP and UDP port numbers, of incoming and outgoing IP packets as they pass through a NAT-capable router. | True |
Created by:
Sabrilstar