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comptia network+ > Modern Ethernet > Flashcards

Modern Ethernet Flashcards

1
Q

100BaseT

A
  • Speed: 100 Mbps
  • Signal Type: Baseband
  • Distance: 100 m between node and hub/switch
  • Node Limit: 1024
  • Topology: star-bus; physical star; logical bus
  • Cable Type: CAT 5 or better UTP or STP cabling with RJ-45 connectors

also called Fast Ethernet & 100BaseTX

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2
Q

baseband

A

only 1 type of signal is carried on the wire

Ethernet

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3
Q

broadband

A

multiple signals flow over the same wire modulating to higher frequencies

cable TV & cable Internet

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4
Q

all modern NICs are [blank]

A

multi-speed, auto-sensing

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5
Q

when to use STP

A

short run in an area of high EMI

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6
Q

100BaseFX

A
  • Speed: 100 Mbps
  • Signal Type: Baseband
  • Distance: 2 km
  • Node Limit: 1024
  • Topology: star-bus; physical star; logical bus
  • Cable Type: multimode fiber-optic cabling with ST or SC connectors
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7
Q

FDDI

A

fiber distributed data interface

college campuses in 90’s

long distances at 100 Mbps

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8
Q

1000BaseTX

A

CAT6 cabling

introduced to compete with 1000BaseT

died off early

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9
Q

gigabit ethernet

1000BaseT

A
  • Speed: 1 Gbps
  • Signal Type: Baseband
  • Distance: 100 m between node and hub/switch
  • Node Limit: 1024
  • Topology: star-bus; physical star; logical bus
  • Cable Type: 4-pair CAT 5e/6 UTP or STP cabling with RJ-45 connectors
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10
Q

CAT 7

A

each pair is surround by shield

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11
Q

duplex negotiation

A

NIC & connected switch

connect at highest level mutually supported

10/100/1000

usually set to automatically negotiate in OS

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12
Q

1000BaseCX

A

uses twinaxial (twinax) special shielded 150-Ohm cables

length limited to 25 m

limited popularity

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13
Q

1000BaseSX

A
  • Speed: 1 Gbps
  • Cabling: MMF
  • Wavelength: 850 nm
  • Connectors: variable, commonly LC
  • Length - 220-500 m
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14
Q

1000BaseLX

A
  • Speed: 1 Gbps
  • Cabling: SMF
  • Wavelength: 1300 nm
  • Connectors: variable, commonly LC & SC
  • Length: 5 km
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15
Q

SFF

A

small form factor

improvement on larger ST & SC fiber connectors

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16
Q

MT-RJ

A

mechanical transfer registered jack

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17
Q

predominant fiber connector

A

LC-type connector

18
Q

PC connector

A

physical contact

2 pieces of fiber touch when inserted

highly polished & slightly spherical to reduce signal loss at point of connection

19
Q

flat-surface connector

A

older

left small gap between fibers due to imperfections in the glass

20
Q

UPC connector

A

ultra physical contact

polished extensively for superior finish

significantly reduces signal loss

21
Q

APC connector

A

angled physical contact

adds 8 degree angle to curved end > further reducing signal loss

connection does not degrade from multiple insertions

22
Q

media converters

A

simple boxes with a port or dongle on either side

used to connect any type of Ethernet cabling together

23
Q

common media converter variants

A

SMF to UTP/STP

MMF to UTP/STP

fiber to coaxial

SMF to MMF

24
Q

GBIC

A

gigabit interface converter

standard developed to support modular gigabit networks

modules can be replaced within hardware to convert from 1 type to another

i.e. RJ-45 to SC

25
Q

SFP

A

small form-factor plug-cable

smaller, swap-able module that has replaced GBIC

26
Q

defining factors of 10 GbE

A

type of fiber used

wavelength of laser

physical layer signaling type

factors also determine max signal distance

27
Q

10GBaseXY

X =

A

type of fiber & wavelength of laser

S = short wavelength

L = long wavelength

E = extra long wavelength

28
Q

10GBaseXY

Y =

A

physical layer signaling standard

R = LAN-based signaling

W = SONET / WAN based signaling

29
Q

10GBaseSR

A

Fiber Type = MMF
Wavelength = 850 nm
Physical Layer SIgnaling = LAN
Max Signal Length = 26 - 300 m

30
Q

10GBaseSW

A

Fiber Type = MMF
Wavelength = 850 nm
Physical Layer SIgnaling = SONET / WAN
Max Signal Length = 26 - 300 m

31
Q

10GBaseLR

A

Fiber Type = SMF
Wavelength = 1310 nm
Physical Layer SIgnaling = LAN
Max Signal Length = 10 km

32
Q

10GBaseLW

A

Fiber Type = SMF
Wavelength = 1310 nm
Physical Layer SIgnaling = SONET / WAN
Max Signal Length = 10 km

33
Q

10GBaseER

A

Fiber Type = SMF
Wavelength = 1550 nm
Physical Layer SIgnaling = LAN
Max Signal Length = 40 km

34
Q

10GBaseEW

A

Fiber Type = SMF
Wavelength = 1550 nm
Physical Layer SIgnaling = SONET / WAN
Max Signal Length = 40 km

35
Q

most common 10 GbE standard

A

10BaseLR

lest expensive

36
Q

10GBaseLRM

A

uses MMF rather than SMF

distance drops to 220 m for most variants

37
Q

10GBaseT

A

Cabling = CAT 6 / 6a UTP
Cable Details = 4-pair / full-duplex
Connectors = RJ-45
Max Length = 55 / 100 m

38
Q

MSAs

A

multisource agreements

agreements among manufacturers to make interoperable devices and standards

39
Q

MSA-base modules

A

plugs into 10 GbE equipment

enables conversion between media types by inserting the correct transceiver

40
Q

common MSA module

A

XENPAK

41
Q

SFP+

A

enhanced small form-factor pluggable

1 of the most popular 10 GbE transceivers

42
Q

multispeed Ethernet network

A

series of high speed (compared to the rest of the network) switches maintain the backbone network

no computers (except maybe some servers) connect to the backbone

each floor has its own switch that connects to all nodes

each floor has a high speed connection to the main backbone switch for that floor

must have switch with dedicated high speed ports (often fiber)

comptia network+ (9 decks)

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