From LAN Technologies Explained

Chapter List

Appendix A: Vendor Identification and Addressing
Appendix B: Ethernet Type Codes
Appendix C: A Glossary of Networking Terms
Appendix D: Bibliography

Ethernet, Token Ring, and FDDI hardware addresses are 48 bits (6 octets), expressed as 12 hexadecimal digits. These 12 hex digits consist of the first, leftmost 6 digits that match the vendor of the interface within the station, and the last, rightmost 6 digits which specify the interface serial number for that interface vendor. These addresses can be written in a number of ways. For example, the addresses might be written unhyphenated (e.g., 123456789ABC), with one hyphen (e.g., 123456789ABC), with colons between each octet (e.g., 12:34:56:78:9A:BC). Most people however write addresses hyphenated by octets (e.g., 12-34-56-78-9A-BC), and this has now become the accepted form.

A.1 Vendor Identification

The information contained in this section relates to physical station addresses, not multicast nor broadcast - hence, the second hex digit (reading from the left) will always be even, and never odd. Represented here, are the Organizationally Unique Identifiers (OUIs) of known vendors as taken from RFC 1700 (Assigned Numbers).

Table A-1: Vendor Information

OUI

Vendor

00-00-0C

Cisco

00-00-0E

Fujitsu

00-00-0F

NeXT

00-00-10

Sytek

00-00-1D

Cabletron Systems

00-00-20

DIAB (Data Industrier AB)

00-00-22

Visual Technology

00-00-2A

TRW

00-00-32

GPT Limited (reassigned from DEC Computers Ltd)

00-00-5A

S & Koch

00-00-5E

IANA

00-00-65

Network General

00-00-6B

MIPS

00-00-77

MIPS

00-00-7A

Ardent

00-00-89

Cayman Systems Gatorbox

00-00-93

Proteon

00-00-9F

Ameristar Technology

00-00-A2

Wellfleet

00-00-A3

Network Application Technology

00-00-A6

Network...


Products & Services
Slewing Rings and Turntable Bearings
Slewing rings and turntable bearings can accommodate axial, radial and moment loads. They are not mounted in a housing or on a shaft, but are instead mounted directly to a seating surface via mounting holes.
Eyelet and Grommet Equipment
Eyelet and grommet machinery and equipment is to install eyelets and grommets. Devices can be manually, electrically, pneumatically or hydraulically-actuated; and consist of handheld tools, benchtop presses, or floor-standing machines.
Rotary Encoders
Rotary encoders convert the angular position of a shaft or axle to an analog or digital code. There are two types of rotary encoders, absolute and incremental encoders, which can be controlled by various technologies which include mechanical, optical, magnetic and fiber optic.
Motor Starters and Contactors
Motor starters and contactors are motor-starting devices. They combine a contactor with overload protection and are designed for starting AC or DC motors.
Refrigerants, Antifreezes, and Cooling Liquids
Primary refrigerants use a thermodynamic or adiabatic process (evaporation-condensation cycles) to remove heat and cool a region. Secondary refrigerants such as antifreeze liquids provide cooling solely through heat transfer.

Topics of Interest

class/Subclass Programming Interface All numbers are expressed in Hex. Class 00 Device predates class code definitions 00 Non-VGA devices 01 VGA devices Class 01 Mass storage controllers 00...

A.1 CIE 1931 Color Matching Functions and Corresponding Chromaticities ? (nm) x(?) y(?) z(?) x(?) y(?) 360 0.000 129 900 0 0.000 003 917 000 0.000 606 100 0 0.175 56 0.005 29 365 0.000 232...

3.6 Inside Conditions The hourly zone air temperature profile can be thought of as the HVAC system control parameter. The cooling load is the rate at which heat must be extracted from the space in...

MAC Filtering In order to fully discuss the advantages and disadvantages of MAC filtering, let's have a short review on what a MAC address is. The term MAC stands for Media Access Control, and forms...

Character Description Decimal Hex Octal Binary HTML Code Character Null 0 00 000 00000000 Ctrl @ NUL Start of Heading 1 01 001 00000001 Ctrl A SOH Start of Text 2 02 002...

Product Announcements
THK America, Inc.
SilverThin Bearing Group of Mechatronics Inc.
SilverThin Bearing Group of Mechatronics Inc.