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Introduction to Networking > 9. Ethernet VE ( Between Layer 2 and 1 ) > Flashcards

9. Ethernet VE ( Between Layer 2 and 1 ) Flashcards

1
Q

What layer does Ethernet operates?

A
  1. Data Link Layer
  2. Physical Layer
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2
Q

What standards does networking technologies defined in?

A
  1. IEEE 802.2 ( LLC )
  2. IEEE 802.3 ( MAC )
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3
Q

List out the standards for the MAC sublayer consists ( 3 )

A
  1. IEEE 802.3
  2. IEEE 802.11
  3. IEEE 802.15
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4
Q

What does LLC sublayer does?

A
  1. Places information in the frame to identify which network layer protocol is used for the frame
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5
Q

What is MAC sublayer responsible of? ( 3 )

A
  1. Data encapsulation
  2. Media access control
  3. Provides data link layer addressing
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6
Q

List out the things that IEEE 802.3 encapsulates ( 3 )

A
  1. Ethernet Frame
  2. Ethernet Addressing
  3. Ethernet Error Detection
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7
Q

What does Ethernet Addressing includes ? ( 2 )

A
  1. Source MAC Address
  2. Destination MAC Address
  • Deliver Ethernet frame from Ethernet NIC to Ethernet NIC on the same LAn
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8
Q

What does Ethernet frame includes what doe error detection?

A
  1. Frame Check Sequence ( FCS )
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9
Q

What modes does today’s Ethernet LAN operate? ( Full / Half Duplec )

A
  1. Full-duplex
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10
Q

Does Full-duplex communications with Ethernet swithes require access control through CSMA/CD?

A
  1. No
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11
Q

What does IEEE 802.3 MAC includes the specifications for?

A
  1. Different ethernet communications standards over various media ( copper, fiber )
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12
Q

What legacy ethernet topology is a shared, half-duplex medium?

A
  1. Bus
  2. Hubs
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13
Q

What does Helf-duplex Ethernet uses to communicate?

A
  1. Contention-based access method
  2. Carrier Sense Multiple Access/Collision Detection ( CSMA/CD )
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14
Q

What is the minimum and maximum Ethernet frame size?

A
  1. Minimum - 64 bytes
  2. Maximum - 1518 bytes
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15
Q

What does the frame called when the frame is less then 64 bytes? ( 2 )

A
  1. Collision Fragment
  2. Runt Frame
  • It will be automatically discarded
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16
Q

What does the frame called when the frame is greater then 1518 bytes? ( 2 )

A
  1. Jumbo
  2. Baby Giant Frames
  • It was usually supported by most Fast Ethernet and Gigabit Ethernet switches and NICs
17
Q

What is the range for 00000000 to 11111111 binary can be represented as hexadecimal?

A
  1. 00 to FF
18
Q

What is the rules of representing Hexadecimal at MAC address? ( 3 )

A
  1. Leading zero are always displayed to complete the 8 bit representation ( 0000 1010 - 0A )
  2. Hexadecimal numbers are often represented by the value 0x to distinguish between decimal and hexedecimal values in documentation
  3. Hexadecimal may also be represented by a subscipt 16, or the hex number followed by an H ( 73H )
19
Q

What does MAC address also called as?

A
  1. NIC Address
20
Q

How many binary value does MAC address consists? How does it expressed?

A
  1. 48 bit binary
  2. 12 hexadecimal values

00-11-22-AA-BB-CC
_________ __________
3 Hex = 48 bit

21
Q

What does MAC address provides?

A
  1. A method for device indentification at the data link layer of the OSI model
22
Q

How to ensure MAC address is unique?

A
  1. Vendors that sell Ethernet devices must register with the IEEE to obtain a unique 6 hexadecimal
23
Q

What are to 6 hexadecimal code called that is assigned to the vendor?

A
  1. Organizationally Unique Identifier ( OUI )
24
Q

What does Ethernet MAC address consists? ( 2 )

A
  1. 6 Hexadecimal Vendor OUI code
  2. 6 Hexadecimal Vendor-Assigned Value
25
Q

What does Ethernet header include?

A
  1. Source MAC Address
  2. Destination MAC Address
26
Q

List out the steps for Frame Processing ( 3 )

A
  1. When a NIC receives an Ethernet frame, it examines the destination MAC address to see if it matches the physical MAC address that is stored in RAM
  2. If there is no match, the device discards the frame
  3. If there is a match, it passes the frame up the OSI layers, where the de-encapsulation process takes place
  • Ethernet NICs will also accept frames if the destination MAC address is broadcast of a multicast group of which the host is a member
27
Q

List out the types of devices that will have an Ethernet NIC and MAC address ( 5 )

A
  1. Workstations
  2. Servers
  3. Printers
  4. Mobile Devices
  5. Routers
28
Q

When does the unicast MAC address is being used?

A
  1. Used when a frame is sent from a single transmitting device to a single destination device
29
Q

What that the term called as the process that a source host uses to determine the destination MAC address associated with an IPv4 address?

A
  1. Address Resolution Protocol ( ARP )
30
Q

What that the term called as the process that a source host uses to determine the destination MAC address associated with an IPv6 address ?

A
  1. Neighbor Discovery
31
Q

Does the source MAC address must always be a unicast?

A
  1. Yes
32
Q
A

Introduction to Networking (13 decks)

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