Honeywell scheda di rete HC900 Manuale

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228 Pagine Italiano

Honeywell scheda di rete HC900
Components and Architecture - Networking Basics Reference
Revision 5 HC900 Hybrid Controller Installation and User Guide 33
9/03
Name/Acronym Name/Definition Comments
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.
Routers differ from Bridges and Switches in that
those devices can only read MAC addresses.
Shared Ethernet
Configuration that binds
several network segments in
a single collision domain.
(See “Port Multiplier”.)
SMTP
Simple Mail Transport
Protocol
Enables transmittal of E-Mail. Details are
available in RFC 821.
SNMP
Simple Network
Management Protocol
Enables a TCP/IP Host to collect network statistics
from other Hosts.
SQE Signal Quality test Often referred to as “heartbeat”.
Straight Cable
Ethernet cable that enables
connection of DCE to DTE
equipment.
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.
Subnet Mask
Defines the netid (Network
ID) and the hostid (Host ID)
parts of an IP address.
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.
Switch
Multi-port device that
connects several network
segments on an address-
selective basis
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.
T-1, T-3 (See DS1, DS3.)
TCP/IP
Transport Control
Protocol/Internet Protocol
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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