NETWORKING BASICS
What device forwards traffic within a LAN using MAC addresses?
Switch
What is a network port?
A logical identifier for a service or application
What protocol is used for IP-based building automation systems?
BACnet/IP
What does the “C” in the CIA Triad stand for?
Confidentiality
What does HTTPS stand for?
Hypertext Transfer Protocol Secure
What does IP stand for?
Internet Protocol
Which protocol uses a three-way handshake?
TCP
What device enables BACnet broadcasts across subnets?
BBMD
Which CIA principle ensures data accuracy and protection from tampering?
Integrity
Which protocol replaced SSL for secure web communication?
TLS
How many bits are in an IPv4 address?
32
Which protocol prioritizes speed over reliability?
UDP
What table stores the IP addresses of all BBMDs?
Broadcast Distribution Table (BDT)
Which CIA principle ensures systems are available when needed?
Availability
Which port is used for HTTPS traffic?
443
Why is subnetting used in BAS networks?
To divide a large network into smaller manageable segments
What three elements make up a socket?
IP address, port number, and protocol
After discovery, how do BACnet/IP devices communicate?
Unicast messages
(Remember initially it broadcasts to all devices until it hears the replies until it finds its destination)
What is a possible result of lost integrity in a BAS?
False sensor readings or incorrect system responses
What do digital certificates verify?
The identity of the server or web interface
What address is always the last address in a subnet?
Broadcast address
Which port number is used for BACnet/IP communication?
47808
Why does BACnet/SC eliminate the need for BBMDs?
Messages are routed through secure hubs using TLS
Why must all three CIA principles be balanced?
Weakness in one compromises system security and reliability
Why is HTTPS critical for BAS web interfaces?
It protects credentials, data, and control commands