Agilent Technologies J3919A Installation & User Manual page 161

Cycle/Stuff Counter (C1)
The Cycle/Stuff Counter (C1) is a 1-byte field in a PLCP frame that controls bit
stuffing and length indication. The C1 byte occurs in the P0 (12th) cell of a PLCP
frame. The value of C1 and its corresponding Trailer length is:
C1
11111111
00000000
01100110
10011001
DACTLU
Deactivate Logical Unit
DACTPU
Deactivate Physical Unit
Data Link Layer
Level 2 of the seven level OSI reference model defined by ISO. This layer
provides the link access control and reliability to networks.
Default Gateway Address
The address of the gateway which is closest to the probe.
DRAM
Dynamic Random Access Memory, which is the main memory of a probe.
ELAN (Emulated Local Area Network)
A logical network defined and controlled by a LAN Emulation (LANE)
mechanism. See also LANE.
Encapsulation
The processing of wrapping data with a new protocol header for transmission over
the network.
Ethernet
A LAN developed by Xerox Corp., Digital Equipment Corp., and Intel Corp. It
uses the CSMA/CD method of access and transmits at 10 Mbit/s on a bus
topology. The IEEE 802.3 standard evolved from Ethernet, but they are not
Frame Cycle
1
2
3 (no stuff)
3 (stuff)
Trailer Length (in nibbles)
13
14
13
14
141