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CCNA 200-301 > 2. Fundamentals of Ethernet > Flashcards

2. Fundamentals of Ethernet Flashcards

1
Q

What is the standard name for 10Base-T

A

802.3

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2
Q

What is the standard for 100Base-T

A

802.3u

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3
Q

What is the standard for 1000Base-T

A

802.3ab

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4
Q

What is the standard for 1000Base-LX

A

802.3z

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5
Q

What is the max length for 1000Base-LX

A

5000m

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6
Q

What is the max length for copper

A

100m

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7
Q

What is the standard for 10GBase-T

A

802.3an

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8
Q

What is the speed of SPF+

A

10Gbps

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9
Q

Which pins are used in a 10BaseT/100BaseT straight through cable

A

1/2 3/6

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10
Q

In a 10BaseT/100BaseT which pins does a switch transmit from

A

3 and 6

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11
Q

Which devices transmit on pins 1,2

A

PC NICS
Routers
WAPs ethernet interface

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12
Q

Which pins transmit on 3,6

A

Hubs and switches

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13
Q

List the parts of a fiber optic cable

A 
Core
Cladding
Buffer
Strengthener
Outer Jacket
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14
Q

What is the light source called for fiber

A

optical transmitter

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15
Q

How man cables do you need for a fiber connection

A

2 - 1 to transmit/receive on each end

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16
Q

What are the standards and max distances for multimode fiber

A

10GBase-S 400m

10GBase-LX4 300m

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17
Q

What are the standards and max distances for single mode fiber

A

10GBase-LR 10km

10GBase-E 30km

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18
Q

Draw a standard ethernet frame

A 
Preamble 7 btyes
SFD 1 byte
Destination 6 bytes
Source 6 bytes
Type 2 bytes
Data/Pad 46-1500bytes
FCS 4 bytes
19
Q

Describe the Preamble field in an Ethernet frame

A

7 bytes used for synchonrization

20
Q

Describe SFD in a Ethernet frame

A

Start Frame Delimiter
1 byte
Indicates next byte begins the destination MAC address

21
Q

What is the minimum and maximum size of the data inside an Ethernet frame

A

46 - 1500 bytes

22
Q

What is MTU

A

maximum transmission unit
max size of L3PDU inside the frame
1500bytes is largest IP MTU allowed over Ethernet

23
Q

What is the size of a MAC address

A

6 bytes (48bits / 12hex)

24
Q

What are the different parts of a MAC address

A

OUI

Vendor assigned

25
Q

What is the OUI

A

Orgazationally Unique Identifier
3 byte code handed out to manufacturers by IEEE
First part of MAC address

26
Q

What are different names for MAC address(6)

A 
LAN address
Ethernet address
Hardware address
Burned in address
Physical address
universal address
27
Q

What is the Type field in an Ethernet frame used for

A

Identify L3PDU inside the frame

Usually IPv4 or IPv6

28
Q

What is the Type for IPv4 in Ethernet frame

29
Q

What is the Type for IPv6 in Ethernet frame

30
Q

Does FCS provide error recovery

A

No, only error detection

31
Q

What is half duplex

A

Device must wait to send if its currently receiving a frame

Cannot send and receive at same time

32
Q

What does CSMA/CD stand for

A

Carrier Sense Multiple Access with Collision Detection

33
Q

What are the steps taken when a collision occurs

A
  1. Sender listens when sending and sends jamming signal to all other nodes when collision has occurred.
  2. They independently choose random time to wait before trying to send again
  3. Listen to see if line is free
34
Q

What does Ethernet shared media mean

A

Designs that use hubs where CSMA/CD is required

35
Q

What term is used with a network built with only switches

A

Ethernet point-to-point

36
Q

What is the difference between multimode and single mode fiber

A

Multimode has multiple angles of light entering core
Uses LED
Single mode has smaller core (1/5 diameter or MM)
Uses Laser

37
Q

What type of fiber connection is 1000Base LX

A

single mode

38
Q

What is the max length for 1000Base ZX

39
Q

What type of connection is 1000Base ZX

A

single mode

40
Q

What type of connection is 1000Base LX4

41
Q

What is Ethernet point to point

A

A network built with only switches

42
Q

Draw a cross over cable

A

1 -3
2-6
3-1
6-2

43
Q

Draw a cross over cable for 1000Base-T

A 
1-3
2-6
3-1
4-7
5-8
6-2
7-4
8-5

CCNA 200-301 (8 decks)

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