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APPENDIX
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LAN - Local Area Network.
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Little endian - The byte at memory address 0 contains the least-significant bits. Used by Intel x86, DEC Vax,
and DEC PDP-11.
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LLC - Logical Link Control layer of LAN CSMA/CD. The upper half of the OSI (which see) reference model data
link layer, between the MAC and the network layer.
•
Locally administered address - An Ethernet address whose second bit transmitted, used to distinguish between
locally or globally administered addresses, is set to 1, indicating a locally administered address. If an address is
to be assigned globally (or U, universal), this bit shall be set to 0. Note that for the broadcast address, this bit is
1
also a 1.
•
MAC - Media Access Control layer of LAN CSMA/CD. The lower half of the OSI (which see) reference model
data link layer, between the LLC and the PLS.
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MAU - Medium Attachment Unit layer of LAN CSMA/CD. See OSI.
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MDI - Medium Dependent Interface layer of LAN CSMA/CD. The part of the MAU that connects the PMA to the
medium. See OSI.
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MII - Media Independent Interface. A four-bit-wide interface between a reconciliation layer and the PLS. The
reconciliation layer connects to the MAC using the existing 802.3 MAC-PLS interface.
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Minimum frame length - 64 bytes (512 bits). Note that this does not include the preamble and the start frame
delimiter.
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Multicast address - An Ethernet destination address whose first bit transmitted, used to identify it either as an
individual or as a group address, is 1, indicating that the address field contains a group address that identifies
none, one or more, or all of the stations connected to the local area network. The first byte of a multicast
address is odd, for example, 01-00-00-00-00-00. There are two kinds of multicast address: (a) Multicast-group
address. An address associated by higher-level convention with a group of logically-related stations. (b)
Broadcast address. A distinguished, predefined multicast address that always denotes the set of all stations on
a given local area network.
•
Multicast-group address - An address associated by higher-level convention with a group of logically-related
stations. This is one of two kinds of multicast address, the other being the broadcast address, ff-ff-ff-ff-ff-ff.
•
NDIS - Network Driver Interface Specification for a generic device driver, independent of protocol or hardware.
•
Network acquisition time - If the DTE transmits for a period exceeding the net acquisition time without detecting
a collision, then the DTE is said to have acquired the network. The DTE will send the remainder of its frame
without the possibility of having a collision in a correctly operating network. By this time, all DTEs in the network
have detected network activity and are deferring to it.... For example, the network acquisition time on a single-
segment 10BASE5 network of 500-meter length is approximately 108 bit times.
•
NIC - Network Interface Controller or Card. Also Network Information Center, at SRI International, which
assigns a network a class field (A, B, or C) and a unique network ID field of the 32-bit TCP/IP addresses.
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OC1 - 51.84 Mbit/s Optical Carrier 1, SONET Synchronous Transport Signal STS-1. 28 DS1 signals or one
DS3.
•
OC3 - 155.52 Mbit/s Optical Carrier 3, SONET Synchronous Transport Signal STS-3. Three byte-interleaved
STS-1 signals.
1. ANSI/IEEE Std. 802.3, 1993 Edition. Section 3.2.3 Address Fields, page 42.
2. Project 802 Local and Metropolitan Area Networks. Draft Guide to ANSI/IEEE Std. 802.3 (CSMA/CS Ac-
cess Method and Physical Layer Specifications). SysTAG Network Guide, Draft 5.2, January 23, 1994.
Section 2.3.1: Network Acquisition Time, page 4.
A-4
KS8910 100/10 Mbps ETHERNET TRANSCEIVER
2
Also called round trip delay.
Preliminary Spec. ver
1.4
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