Honeywell HC900 manual Subnetids

		Components and Architecture - Networking Basics Reference
Name/Acronym	Name/Definition	Comments
RJ-45	Style of connector at end of
	Ethernet twisted-pair cable
Router	A device that is capable of	Routers differ from Bridges and Switches in that
	filtering messages based on	those devices can only read MAC addresses.
	IP addresses.
Shared Ethernet	Configuration that binds	(See “Port Multiplier”.)
	several network segments in
	a single collision domain.
SMTP	Simple Mail Transport	Enables transmittal of E-Mail. Details are
	Protocol	available in RFC 821.
SNMP	Simple Network	Enables a TCP/IP Host to collect network statistics
	Management Protocol	from other Hosts.
SQE	Signal Quality test	Often referred to as “heartbeat”.
Straight Cable	Ethernet cable that enables	In a "straight" cable, the Transmit wiring pair at
	connection of DCE to DTE	one end is wired directly to Transmit wiring pair
	equipment.	connections at the other end, and the Receive pair
		at one end is wired to the Receive pair at the other
		end.
Subnet Mask	Defines the netid (Network	The netid uniquely identifies a network, and the
	ID) and the hostid (Host ID)	hostid uniquely defines a computer on the network.
	parts of an IP address.	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.
Switch	Multi-port device that	A Switch uses (MAC) source and destination
	connects several network	addresses in each packet to establish the
	segments on an address-	appropriate channel from the sending node to the
	selective basis	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.
T-1, T-3	(See DS1, DS3.)
TCP/IP	Transport Control	Transmission Control Protocol (TCP):
	Protocol/Internet Protocol
		- 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)

Revision 5	HC900 Hybrid Controller Installation and User Guide	33
9/03