ADC Cuda 12000 Guia de Instalação descarregar pdf (Página 149)

GLOSSARY

16 QAM Modulation mode used by the CMTS. QAM uses both amplitude and

phase modulation to encode multiple bits of data in one signaling

element, thus achieving higher data transfer rates than just amplitude or

phase modulation alone.

16 QAM encodes four bits per symbol as one of sixteen possible

amplitude and phase combinations. 16 QAM refers to the number of

discrete phase/amplitude states that are used to represent data bits.

64 QAM A modulation mode used by the CMTS. 64 QAM uses both amplitude

and phase modulation to encode multiple bits of data in one signaling

element. 64 QAM encodes 6 bits per symbol as one of 64 possible

amplitude and phase combinations.

256 QAM A modulation mode used by the CMTS. 256 QAM uses both amplitude

and phase modulation to encode multiple bits of data in one signaling

element. 64 QAM encodes 8 bits per symbol as one of 256 possible

amplitude and phase combinations.

A Record that contains the IP address of the record’s owner. Since hosts

may have multiple IP addresses, multiple A records may match a given

domain name.

Address Resolution

Protocol (ARP)

A protocol for mapping an Internet Protocol address (IP address) to a

physical machine address that is recognized in the local network. For

example, in IP Version 4, the most common level of IP in use today, an

address is 32 bits long. In an Ethernet local area network, however,

addresses for attached devices are 48 bits long. (The physical machine

address is also known as a Media Access Control or MAC address

address.)

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ADC Cuda 12000 Guia de Instalação Página 149