FAST ETHERNET

(rozwiniecie Ethernetu 10BASE-T)

1995 – IEEE 802.3u

In November 1992, Cisco Systems proposed the concept of Fast Ethernet to the IEEE. The final
IEEE 802.3u specification was approved in June 1995

zachowany format ramki IEEE 802.3

predkosc transmisji – 100Mbps

metoda dostepu do nosnika: CSMA/CD; przelaczanie

urzadzenia sieciowe: Fast Ethernet HUB 100; Class I i Class II,

Fast Ethernet HUB 10/100,
Switching HUB 100 lub 10/100.

nosniki: UTP, STP, FIBER

wersje:

100BASE-TX

-

UTP cat. 5, 2 pary

100BASE-T4

-

UTP cat. 3, 4 lub 5, 4 pary

100BASE-FX

-

Maximum Distance Parameters (TX, FX):

Model

Copper

Copper and

Fiber

Fiber

DTE-DTE (no

repeater)

100m

N/A

412m

One Class I

repeater

200m

261m

272m

One Class II

repeater

200m

308m

320m

Two Class II

repeaters

205m

200m cat. 3

216m

228m

Uwaga: Mixed copper and fiber assumes a 100m copper link

Cabling and Distance Parameters:

Physical

Sublayer

Option

Cable Specification

Length

(meters)

Uwagi

100BaseTX

Category 5 UTP, two pairs;
Types 1 and 2 STP, two pairs

100
100

half/full duplex
half/full duplex

100BaseT4

Categories 3, 4, and 5 UTP,
four pairs

100

half duplex

100BaseFX

62.5/125 multimode fiber,
two strands

400

2000

half duplex
full duplex

Full Duplex -Full-duplex technology delivers up to 200 Mbps
bandwidth because it provides bidirectional communication-100 Mbps is
available for transmission in each direction.

VLAN – sieci wirtualne

ISL –

Inter Switch Link (polaczenia typu TRUNK)

EtherChanel- agregacja przepustowosci

Auto Negotiation.

100BaseT specification describes a negotiation process that

allows devices at each end of a network link to automatically exchange information
about their capabilities and performs the configuration necessary to operate
together at their maximum common level. Auto negotiation can determine whether
a 100-Mbps hub is connected to a 10-Mbps or 100-Mbps adapter and then adjust its
mode of operation accordingly.
Auto negotiation activity is performed out-of-band using Fast Link Pulse (FLP)
Burst to identify the highest physical-layer technology that can be used by both
devices, such as 10BaseT, 100BaseTX, or 100BaseT4. The auto negotiation
definition also provides a parallel detection function that allows half- and full-
duplex 10BaseT, half- and full-duplex 100BaseTX, and 100BaseT4 physical
layers to be recognised, even if one of the connected devices does not offer auto
negotiation capabilities.

End-to-end flow control

Alternative High-Speed Technologies

100BaseT

Fast

Ethernet

100VG-

AnyLAN

CDDI/

FDDI

ATM

LAN

Switching

Data
Rate

100 Mbps

100 Mbps

100 Mbps

25 to 622

Mbps

10 or

4/16-Mbps

Access

Method

CSMA/

CD

Demand

priority

Token

passing

Cell

based

Switching

Frame

Size

64 to 1518

bytes

64 to 16

KB

64 to 4500

bytes

53 bytes

64 to 8

KB

Services

Asynchro-

nous

Asynchro-

nous and

synchron-

ous

Asynchro-

nous and

synchronou

s

Isochrono

-us,

asynchro

nous,

Asynchron

ous

synchrono

us

Network

Diameter

205m

300m

100m to

30km

100m to

multiple

miles km

N/A

Manage

ment

SNMP and

Ethernet

MIBs

SNMP

MIB

SMT,

SNMP

Proprietar

y MIBs

and

SNMP

SNMP

and

Ethernet

MIBs

Cost

Low cost

Low cost

Declining

cost

Higher

cost

Low cost

Fault

Toleranc

e

Spanning

tree

---

Dual-

homing

ring

Multiple

paths

Spanning

tree

Applica

tion

Desktop,
workgroup
, backbone

Desktop,
backbone,
and
multime-
dia

Desktop,
Workgroup
backbone

Backbone
WAN,
LAN,
multimed
ia,

Desktop,
workgroup
, and
backbone