Honeywell HC900 Installation And User Manual page 43

Name/Acronym
RJ-45 Style of connector at end of
Ethernet twisted-pair cable
Router A device that is capable of
filtering messages based on
IP addresses.
Shared Ethernet Configuration that binds
several network segments in
a single collision domain.
SMTP Simple Mail Transport
Protocol
SNMP Simple Network
Management Protocol
SQE Signal Quality test
Straight Cable Ethernet cable that enables
connection of DCE to DTE
equipment.
Subnet Mask Defines the netid (Network
ID) and the hostid (Host ID)
parts of an IP address.
Switch Multi-port device that
connects several network
segments on an address-
selective basis
T-1, T-3 (See DS1, DS3.)
TCP/IP Transport Control
Protocol/Internet Protocol
Revision 5
9/03
Name/Definition
HC900 Hybrid Controller Installation and User Guide
Components and Architecture - Networking Basics Reference
Comments
Routers differ from Bridges and Switches in that
those devices can only read MAC addresses.
(See "Port Multiplier".)
Enables transmittal of E-Mail. Details are
available in RFC 821.
Enables a TCP/IP Host to collect network statistics
from other Hosts.
Often referred to as "heartbeat".
In a "straight" cable, the Transmit wiring pair at
one end is wired directly to Transmit wiring pair
connections at the other end, and the Receive pair
at one end is wired to the Receive pair at the other
end.
The netid uniquely identifies a network, and the
hostid uniquely defines a computer on the network.
The Subnet Mask can be used to partition the
network into sub-networks, using parts of the
hostid to define new netids, or more correctly,
subnetids.
Portioning a network in this way enables switches
and routers to use the subnetids to reduce collision
domains and to promote security.
A Switch uses (MAC) source and destination
addresses in each packet to establish the
appropriate channel from the sending node to the
receiving node. The Switch looks very much like a
Hub, but differs in that ports are isolated from each
other, eliminating the multi-segment collision
domain that is characteristic of a Hub.
Transmission Control Protocol (TCP):
- operates at the Transport Layer of the OSI Model.
- manages connections between computers.
(Also see User Datagram Protocol [UDP]).
Internet Protocol (IP):
- operates at the Network Layer (one step below
TCP)
- defines how data is addressed (source/destination)
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