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Introduction to networks > Ethernet Chap 5 > Flashcards

Ethernet Chap 5 Flashcards

1
Q

Which sublayer does ethernet 802.2 operate at?

A

logical link control LLC

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2
Q

Which sublayer does ethernet 802.3 operate at?

A

MAC sublayer

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3
Q

Which ethernet sublayer controls the network interface card through software drivers?

A

LLC

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4
Q

Which ethernet sublayer works with the upper layers to add application information for delivery of data to higher level protocols?

A

LLC

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5
Q

Which ethernet sublayer works with hardware to support bandwidth requirements-checks for errors in bits sent and received

A

MAC

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6
Q

Which ethernet sublayer controls access to the media through signaling and physical media standards requirements?

A

MAC

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7
Q

Which ethernet sublayer support ethernet technology by using CSMA/CD or CSMA/CA?

A

MAC

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8
Q

Which ethernet sublayer remains relatively independent of physical equipment?

A

LLC

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9
Q

What are the 2 major responsibilities of the Ethernet MAC sublayer?

A

data encapsulation and media access control

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10
Q

3 primary functions of Ethernet data encapsulation

A
  1. Frame delimiting 2. Addressing 3. Error detection
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11
Q

2 primary functions of media access control

A
  1. control of frame placement on and of the media

2. media recovery

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12
Q

media access control method that does require mechanisms for tracking whose turn it is to access the media

A

contention based

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13
Q

how many bits are there in an ethernet mac address?

A

48 bits

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14
Q

how many bytes are there in an ethernet mac address?

A

6 bytes

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15
Q

how many hex digits in an ethernet mac address?

A

12 digits

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16
Q

who do vendors that sell ethernet devices need to register with?

A

IEEE

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17
Q

How many bytes is the part of the mac address that is assigned to the vendor.

A

3 bytes

18
Q

what is the name of the mac address that is assigned to the vender?

A

Organizationally unique identifier OUI

19
Q

How many hex digits is the 24 bit code of the mac address assigned to the vendor?

A

6 hex digits

20
Q

When a computer starts up, what is the first thing the nic does?

A

it copies the MAC address from ROM to RAM

21
Q

Which sublayer does each NIC in the network view the information?

A

NICs work at the MAC sublayer

22
Q

What are the 2 styles of Ethernet framing?

A
  1. IEEE 802.3 2. The DIX Ethernet standard (Ethernet II)
23
Q

Which frame format is used in TCP/IP networks?

A

Ethernet II

24
Q

What is the difference of the 2 different ethernet frame formats?

A

802.3 adds the Start Frame Delimiter and changes the type field to the length field

25
Q

What is a frame that is not at least 64 bytes in length?

A

collision fragment or runt frame

26
Q

How may bytes must a frame be to not be discarded by receiving stations?

A

at least 64 bytes

27
Q

What is the maximum allowable frame size?

A

1522 bytes

28
Q

What are the primary fields in an IEEE 802.3 Ethernet frame?

A

Preamble, Start of frame delimiter, destination address, source address, length, 802.2 header and data, frame check sequence

29
Q

how many bytes is the preamble of the 802.3 ethernet frame?

A

7 bytes

30
Q

how big is the SFD of the 802.3 ethernet frame?

A

1 byte

31
Q

how big is the destination address of an 802.3 ethernet frame

A

6 bytes

32
Q

how big is the source address of an 802.3 ethernet frame

A

6 bytes

33
Q

how big is the length field of an 802.3 ethernet frame?

A

2 bytes

34
Q

how big is the header and data of an 802.3 ethernet frame?

A

46 to 1500 bytes

35
Q

how big is the fcs field of an 802.3 ethernet frame?

A

4 bytes

36
Q

802.3 Ethernet frame field uses pad to increase this frame field to at least 64 bytes

A

802.2 Header and data

37
Q

802.3 Ethernet frame field describes which higher level protocol has been used

A

type

38
Q

802.3 Ethernet frame field that shows the frame’s originating nic or interface MAC address

A

source address

39
Q

802.3 Ethernet frame field that assists a host in determining if the frame received is addressed to it

A

destination address

40
Q

802.3 Ethernet frame field that notifies destinations to get ready for a new frame

A

preamble

41
Q

802.3 Ethernet frame field that synchronizes sending and receiving devices for frame delivery

A

start of frame delimitier

42
Q

802.3 Ethernet frame field that detects errors in an ethernet frame

A

frame check sequence

Introduction to networks (9 decks)

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