NIC — Network Interface Card is an expansion board you insert into a computer so
the computer can be connected to a network.
NIU — The NIU provides network connectivity for management, signaling, and media
traffic to and from the Acme Packet 4600 System.
NVRAM — Non-volatile Random Access Memory is a type of memory that retains its
contents when power is turned off.
Optical Transceiver — The fiber connection to the Acme Packet 4600 System plugs
into an optical transceiver. Through this connection, light energy is converted into
electrical energy.
PCMCIA — Personal Computer Memory Card International Association is an
organization consisting of approximately 500 companies that has developed a
standard for small, credit-card sized devices (PC cards). This standard is designed for
attaching input/output devices such as network adaptors, fax/modems, or hard drives
to notebook computers.
Physical Interface Card — The physical interface card is synonymous with the network
interface cards on the Acme Packet 4600 System.
PROM — Programmable Read-only Memory is a memory chip on which data can only
be written once. A PROM is non-volatile; it is a memory chip on which data can be
written only once.
QoS — Quality of Service is a networking term that refers to the capability of a network
to provide better service to selected network traffic over various technologies.
RAM — Random Access Memory is a type of computer memory that can be accessed
randomly. RAM is the same as main memory.
RS-232 — Recommended Standard 232 is a standard interface approved by the
Electronic Industries Association for connecting serial devices.
RJ45 — Registered Jack 45 is an eight-wire connector commonly used to connect
computers onto a LAN.
SNMP — Simple Network Management Protocol is a set of protocols used for
managing complex networks and network devices.
SDRAM — Synchronous Dynamic Random Access Memory is a type of DRAM that
can run at much higher clock speeds than conventional memory.
Telnet — Telnet is a standard terminal emulation program that allows remote login
and connection to systems/servers on a network. Telnet uses a single TCP/IP network
connection to provide this remote login, control, and communication functionality.
TCP — Transmission Control Protocol provides a reliable stream delivery and virtual
connection service to applications through the use of sequenced acknowledgment with
the retransmission of packets when necessary.
UPS — Uninterruptible Power Supply is a power supply that can run off of a backup
battery when primary power is lost.
UDP — User Datagram Protocol provides a simple, but unreliable message service
for transaction-oriented services. Each UDP header carries both a source port
identifier and a destination port identifier, allowing high-level protocols to target specific
applications and services among hosts.
Chapter 8
8-2