CTI Products EXB-IP Ethernet System Extender - Manual (Page 38)

CTI Products, Inc. EXB-IP User Guide
Glossary 38
Multicast A method of communicating in which all devices join (and listen to) a common (IP
Multicast) group. A transmitting device will need to send messages to a single
destination (the Multicast address) to send a message to all modules. This reduces
loading on the EXB-IP modules and bandwidth required on the network.
Multicast IP Address An IP address in the range of 224.0.0.1 to 239.255.255.254 used for information
broadcasts to registered computers. Many networks will have filters configured on
routers and firewalls to pass or reject traffic to specific Multicast IP addresses or
ranges.
RS-232 Port 9 pin serial port
Subnet A subnet is the range of addresses which a device can communicate directly without
having to go through a router. A subnet is defined by an IP address and a subnet mask.
Subnet mask A 32 bit number typically formatted as an IP address, used with an IP address in
defining a subnet. When converted to binary, any of the 1's in the Subnet Mask
indicate the Subnet for a particular IP address. Target
The EXB-IP module(s) to
which a particular member EXB-IP module communicates. EXB-IP modules can be
configured to communicate either with all modules or just a central member.
UDP User Datagram Protocol
UDP Port A number used by the UDP protocol to indicate the source or destination within a
device that uses UDP protocol. Devices will send from their Source Port and will
listen on their Destination Port. Many systems will have routers and firewalls
configured to pass or reject packets based on the Source and/or Destination ports.