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ethernet Flashcards

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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
# which OSI layers are equivalent to 802.3
Physical + MAC sublayer
26
# What is the relationship between layers of OSI to IEEE 802.x
27
# what is the number of the Ethernet standards
IEEE 802.3
28
568A
29
568B
30
# what signaling protocol only uses Baseband
Ethernet
31
# what is this called * 8 bytes of alternating 1s & 0s * used for clock synchronization * part of the CSMA/CD protocol to identify collisions early
Ethernet frame preamble
32
# what is this called * 2 consecutive 1s at the end * used for clock synchronization * part of CSMA/CD protocol
Ethernet frame SFD
33
# what is * 48 bits (6 bytes) long * unique device identifier
MAC address
34
# what can be this size 46-1500 bytes max- 1518
802.3 payload
35
# 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
ethertypes
36
# what is this called * IPv4 0x0800 (Internet Protocol version 4) * IPv6 0x86DD (Internet Protocol Version 6) * ARP 0x0806 (Address Resolution Protocol)
Ethertypes
37
# what is this called **xBASE- y** ## Footnote x Signal Mode y bit rate (baseband or broadband) designator for the media type Mbps or Gbps (Ethernet only uses baseband)
Ethernet deployment standard formula
38
# what is this called Ethernet standard 10Mbps Baseband signal twisted pair copper cabling
10BASE- T
39
# what is this called 100BASE- TX * Cat 5 or better * UTP * max length- 100m
Fast Ethernet 802.3u
40
# what is this called devices chose the highest supported connection parameters
autonegotiation protocol
41
# what is this called link integrity test + node 16-bit data packet signaling its service capabilities (speed & half or full duplex)
fast link pulse
42
# what provides a standard network-layer service interface, regardless of which MAC sublayer protocol is used
802.2
43
# which standard is this LLC- Logical Link Control sublayer
802.2
44
# which standard is this Physical + MAC sublayer
802.3
45
# what is in the Ethernet frame error checking field
Cyclic Redundancy Check - CRC or Frame Check Sequence - FCS
46
# what is LX
long wavelength optics standard
47
# what is SX
short wavelength optics standard
48
1000BASE-X refers to
various fiber standards
49
# describe 1000BASE-T
* gigabit ethernet * UTP * cat 5e, 6, 6A * max 100m
50
# describe 1000BASE-LX (1270 to 1355)
* MMF (62.5/125 or 50/125) max 550m * SMF (9/125) max 5km
51
# describe 1000BASE-SX (770 to 850 nm)
* MMF (OM1: 62.5/125) max 220m * MMF (OM2: 50/125) max 550m
52
10GBASE-T
10GB UTP (Cat 6)- 55m F/UTP (Cat 6A)- 100m S/FTP (Cat 7)- 100m
53
10GBASE-SR (850nm)
MMF (OM3: 50/125) 300m MMF (OM4: 50/125) 400m
54
10GBASE-LR (1310nm)
SMF (9/125) 10 km
55
10GBASE-ER (1550nm)
SMF (9/125) 40 km
56
10Gbe Ethernt only works with
switches
57
# what is the long wavelength optics standard
LX
58
# what is the short wavelength optics standard
SX
59
# which standard does this cover various fiber standards
1000BASE-X refers to
60
# which standard does this cover * gigabit ethernet * UTP * cat 5e, 6, 6A * max 100m
1000BASE-T
61
# which standard does this cover * MMF (62.5/125 or 50/125) max 550m * SMF (9/125) max 5km
1000BASE-LX (1270 to 1355)
62
# which standard does this cover * MMF (OM1: 62.5/125) max 220m * MMF (OM2: 50/125) max 550m
1000BASE-SX (770 to 850 nm)
63
# which standard does this cover 10GB UTP (Cat 6)- 55m F/UTP (Cat 6A)- 100m S/FTP (Cat 7)- 100m
10GBASE-T
64
# which standard does this cover MMF (OM3: 50/125) 300m MMF (OM4: 50/125) 400m
10GBASE-SR (850nm)
65
# which standard does this cover SMF (9/125) 10 km
10GBASE-LR (1310nm)
66
# which standard does this cover SMF (9/125) 40 km
10GBASE-ER (1550nm)

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