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ethernet Flashcards

1
Q

IEEE 802.3

A

Ethernet standards

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2
Q

568A

A
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3
Q

568B

A
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4
Q

What kind of signaling is used in Ethernet

A

Baseband

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5
Q

what type of access control is used in Ethernet

A

contention based- CSMA/CD

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6
Q

what is the format of an

Ethernet frame

A
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7
Q

describe an

Ethernet frame preamble

A
  • 8 bytes of alternating 1s & 0s
  • used for clock synchronization
  • part of the CSMA/CD protocol to identify collisions early
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8
Q

describe an

Ethernet frame SFD

A
  • 2 consecutive 1s at the end
  • used for clock synchronization
  • part of CSMA/CD protocol
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9
Q

SFD =

A

Start of Frame Delimeter

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10
Q

describe a

MAC address

A
  • 48 bits (6 bytes) long
  • unique device identifier
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11
Q

what is the size of an

802.3 payload

A

46-1500 bytes

max- 1518

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12
Q

MTU =

A

Maximum Transmission Unit

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13
Q

describe

ethertypes

A
  • two-octet field in an Ethernet frame
  • used to indicate which protocol is encapsulated in the payload of the frame
  • used at the receiving end by the data link layer to determine how the payload is processed
  • also used to indicate the size of some Ethernet frames
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14
Q

examples of

Ethertypes

A
  • IPv4 0x0800 (Internet Protocol version 4)
  • IPv6 0x86DD (Internet Protocol Version 6)
  • ARP 0x0806 (Address Resolution Protocol)
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15
Q

Ethernet frame FCS =

A

Frame Check Sequence

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16
Q

Ethernet CRC =

A

Cyclic Redundancy Check

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17
Q

size of

Ethernet FCS or CRC

A

32 bit (4 bytes)

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18
Q

what is the format of

Ethernet deployment standard formula

A

xBASE- y

x Signal Mode y

bit rate (baseband or broadband) designator for the media type

Mbps or Gbps (Ethernet only uses baseband)

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19
Q

describe

10BASE- T

A

Ethernet standard

10Mbps Baseband signal twisted pair copper cabling

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20
Q

describe

Fast Ethernet

802.3u

A

100BASE- TX

  • Cat 5 or better
  • UTP
  • max length- 100m
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21
Q

what is

autonegotiation protocol

A

devices chose the highest supported connection parameters

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22
Q

what is

fast link pulse

A

link integrity test + node 16-bit data packet signaling its service capabilities (speed & half or full duplex)

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23
Q

802.2 provides

A

a standard network-layer service interface, regardless of which MAC sublayer protocol is used

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24
Q

what is

802.2

A

LLC- Logical Link Control sublayer

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25
Q

which OSI layers are equivalent to

802.3

A

Physical + MAC sublayer

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26
Q

What is the relationship between layers of

OSI to IEEE 802.x

A
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27
Q

what is the number of the

Ethernet standards

A

IEEE 802.3

28
Q
A

568A

29
Q
A

568B

30
Q

what signaling protocol only uses

Baseband

A

Ethernet

31
Q

what is this called

  • 8 bytes of alternating 1s & 0s
  • used for clock synchronization
  • part of the CSMA/CD protocol to identify collisions early
A

Ethernet frame preamble

32
Q

what is this called

  • 2 consecutive 1s at the end
  • used for clock synchronization
  • part of CSMA/CD protocol
A

Ethernet frame SFD

33
Q

what is

  • 48 bits (6 bytes) long
  • unique device identifier
A

MAC address

34
Q

what can be this size

46-1500 bytes

max- 1518

A

802.3 payload

35
Q

what is this called

  • two-octet field in an Ethernet frame
  • used to indicate which protocol is encapsulated in the payload of the frame
  • used at the receiving end by the data link layer to determine how the payload is processed
  • also used to indicate the size of some Ethernet frames
A

ethertypes

36
Q

what is this called

  • IPv4 0x0800 (Internet Protocol version 4)
  • IPv6 0x86DD (Internet Protocol Version 6)
  • ARP 0x0806 (Address Resolution Protocol)
A

Ethertypes

37
Q

what is this called

xBASE- y

x Signal Mode y

bit rate (baseband or broadband) designator for the media type

Mbps or Gbps (Ethernet only uses baseband)

A

Ethernet deployment standard formula

38
Q

what is this called

Ethernet standard

10Mbps Baseband signal twisted pair copper cabling

A

10BASE- T

39
Q

what is this called

100BASE- TX

  • Cat 5 or better
  • UTP
  • max length- 100m
A

Fast Ethernet

802.3u

40
Q

what is this called

devices chose the highest supported connection parameters

A

autonegotiation protocol

41
Q

what is this called

link integrity test + node 16-bit data packet signaling its service capabilities (speed & half or full duplex)

A

fast link pulse

42
Q

what provides

a standard network-layer service interface, regardless of which MAC sublayer protocol is used

A

802.2

43
Q

which standard is this

LLC- Logical Link Control sublayer

A

802.2

44
Q

which standard is this

Physical + MAC sublayer

A

802.3

45
Q

what is in the

Ethernet frame error checking field

A

Cyclic Redundancy Check - CRC or

Frame Check Sequence - FCS

46
Q

what is

LX

A

long wavelength optics standard

47
Q

what is

SX

A

short wavelength optics standard

48
Q

1000BASE-X refers to

A

various fiber standards

49
Q

describe

1000BASE-T

A
  • gigabit ethernet
  • UTP
  • cat 5e, 6, 6A
  • max 100m
50
Q

describe

1000BASE-LX (1270 to 1355)

A
  • MMF (62.5/125 or 50/125) max 550m
  • SMF (9/125) max 5km
51
Q

describe

1000BASE-SX (770 to 850 nm)

A
  • MMF (OM1: 62.5/125) max 220m
  • MMF (OM2: 50/125) max 550m
52
Q

10GBASE-T

A

10GB

UTP (Cat 6)- 55m

F/UTP (Cat 6A)- 100m

S/FTP (Cat 7)- 100m

53
Q

10GBASE-SR (850nm)

A

MMF (OM3: 50/125) 300m

MMF (OM4: 50/125) 400m

54
Q

10GBASE-LR (1310nm)

A

SMF (9/125) 10 km

55
Q

10GBASE-ER (1550nm)

A

SMF (9/125) 40 km

56
Q

10Gbe Ethernt only works with

A

switches

57
Q

what is the

long wavelength optics standard

A

LX

58
Q

what is the

short wavelength optics standard

A

SX

59
Q

which standard does this cover

various fiber standards

A

1000BASE-X refers to

60
Q

which standard does this cover

  • gigabit ethernet
  • UTP
  • cat 5e, 6, 6A
  • max 100m
A

1000BASE-T

61
Q

which standard does this cover

  • MMF (62.5/125 or 50/125) max 550m
  • SMF (9/125) max 5km
A

1000BASE-LX (1270 to 1355)

62
Q

which standard does this cover

  • MMF (OM1: 62.5/125) max 220m
  • MMF (OM2: 50/125) max 550m
A

1000BASE-SX (770 to 850 nm)

63
Q

which standard does this cover

10GB

UTP (Cat 6)- 55m

F/UTP (Cat 6A)- 100m

S/FTP (Cat 7)- 100m

A

10GBASE-T

64
Q

which standard does this cover

MMF (OM3: 50/125) 300m

MMF (OM4: 50/125) 400m

A

10GBASE-SR (850nm)

65
Q

which standard does this cover

SMF (9/125) 10 km

A

10GBASE-LR (1310nm)

66
Q

which standard does this cover

SMF (9/125) 40 km

A

10GBASE-ER (1550nm)

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