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CS 242 Mike > Ch 5 > Flashcards

Ch 5 Flashcards

1
Q

LLC standard

A

802.2

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2
Q

MAC standard

A

802.3

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3
Q

MAC sub layer responsibility

A

data encapsulation

media access control

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4
Q

MAC data encapsulation functions

A

frame delimiting
addressing
error detection

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5
Q

media access control

A

placement and removal of frames in media. Related to CMSA/CD

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6
Q

CMSA/CD

A

carrier sense multiple access collision detection

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7
Q

Ethernet II structure

A 
Preamble 8
Dest 6
Src 6
Type 2
Data 46 - 1500
FCS - 4
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8
Q

Min and max frame size

A

64 - 1518

preamble not counted

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9
Q

common EtherType fields

A

x0800 IPv4
x86DD IPv6
x0806 ARP

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10
Q

OUI

A

organizationally unique identifier

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11
Q

switch fabric

A

integrated circuits and machine programming that creates data paths between devices

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12
Q

CAM

A

content addressable memory

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13
Q

unknown unicast

A

when switch forwards frame out of all ports except incoming

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14
Q

store-and-forward

A

switch receives entire frame

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15
Q

cut-through

A

switch forwards frame before it is totally received. Buffers just enough to read destination MAC to know what port to forward the data to.

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16
Q

fast-forward switching

A

version of cut-through, sends just after reading destination address

17
Q

fragment-free switching

A

version of cut-through, checks first 64 bytes

18
Q

port-based buffering

A

queues linked to specific ports, but 1 port can hang up others

19
Q

shared memory buffering

A

common memory buffer

20
Q

asymmetric switching

A

more bandwidth allocated to certain ports

21
Q

autonegotiation

A

two devices exchange information about speed and duplex capabilities

22
Q

auto-mdix

A

automatic medium-dependent interface crossover

23
Q

show ip arp

A

display arp table

CS 242 Mike (7 decks)

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