Glossary
HSIM-W6 Installation Guide
E-5
RS-232 —
EIA standard specifying the physical layer interface used to connect a device to
communications media.
Serialization Frames —
Frames sent out by servers under IPX to check whether illegal copies of
NetWare are in use on the network.
Service Advertising Protocol (SAP) —
Protocol used by IPX for broadcasting information
about services available on the network, such as file servers, CD-ROM drives and modem pools.
SNAP —
Sub-Network Access Protocol. An Ethernet or Token Ring frame type that adds
additional information to a data packet to allow for identification of the upper layer protocol the
packet is destined for.
SNMP —
Simple Network Management Protocol. A widely implemented Internet network
management protocol that allows status monitoring, getting/setting of parameters for configuration
and control of network devices, such as routers and bridges.
Split B Channels —
Each 64 Kbps ISDN B-channel can be used individually for a separate data
connection.
Spoofing —
Spoofing is a technique used to remove poll and update service frames from WAN
links while ensuring that the network continues to operate normally. Spoofing is employed to
minimize dial-up line connection time.
Subnet Address —
An extension of the Internet 32-bit addressing scheme that allows the
separation of physical or logical networks within the single network number assigned to an
organization. TCP/IP entities outside this organization have no knowledge of the internal
“subnetting.”
Subnet Mask —
A 32-bit internet protocol address mask used to identify a particular
subnetwork.
T1.617 —
ANSI Frame Relay Data Link Layer specification for UNI.
TCP/IP —
Transmission Control Protocol/Internet Protocol. Refers to a set of internetworking
protocols developed by the U.S. Department of Defense that define a two level layered approach
for interoperability. TCP provides a connection-oriented Transport layer ensuring end-to-end
reliability in data transmission. IP provides for Network layer connectivity using connectionless
datagrams.
Telco Cloud —
The “cloud” of switched virtual connections.
