Ccna- Fundamentals Of Ethernet Lans

Front 1

10 Mb ethernet

Back 1

10 Base T

802.3

Copper, 100m

Front 2

100 Mb ethernet

Back 2

Fast Ethernet

100BASE-T

802.3u

Copper, 100m

Front 3

1000 Mb Ethernet

Back 3

Gigabit Ethernet

1000Base-LX

802.3z

Fiber, 5000m

Front 4

1000 Mb Ethernet

Back 4

Gigabit Ethernet

1000Base-T

802.3ab

Copper, 100m

Front 5

10 Gb Ethernet

Back 5

10 Gig Ethernet

10GBASE-T

802.3an

copper, 100m

Front 6

Header and trailer

Back 6

bytes of overhead data that Ethernet uses to do its job of sending data over a LAN.)

Front 7

Focus of Ethernet data link
protocols

Back 7

sending an Ethernet frame from source to destination Ethernet node.

From a data link perspective, nodes build and forward frames

Front 8

"frame" refers to?

Back 8

header and trailer of a data link protocol, plus the data encapsulated inside that header and trailer

Front 9

Crosstalk

Back 9

EMI between wire pairs in the same cable

Front 10

Ethernet straight through cable concept

Back 10

PC transmits on 1,2 receives on 3,6

Switch receives on 1,2 transmits on 3,6

A straight-through cable works correctly when the nodes use opposite pairs for transmitting
data.

Front 11

Crossover cable

Back 11

when two like devices connect to an Ethernet link, they both transmit on over the same pins. In that case, you then need another type of cabling pinout called a crossover cable. The crossover cable pinout crosses the pair at the transmit pins on each device to the receive pins on the opposite device.

Front 12

NIC transmits on?

Switch transmits on?

Back 12

1,2

3,6

Front 13

Use crossover cable when?

Back 13

If the endpoints transmit on the same pin pair

Front 14

Use straight through when?

Back 14

If the endpoints transmit on different pin pairs

Front 15

Devices that transmit on 1,2

Back 15

NICS

Routers

WAPs

Front 16

Devices that transmit on 3,6

Back 16

Hubs

Switches

Front 17

Auto-mdix

Back 17

notices when the wrong cable is used
and automatically changes its logic to make the link work.

Front 18

Preamble

Back 18

7 bytes

Synchronization

Front 19

Start Frame
Delimiter (SFD)

Back 19

1 byte

Signifies that the next byte begins the Destination MAC Address field

Front 20

Destination MAC Address

Back 20

6 bytes

Identifies the intended recipient of this frame

Front 21

Source MAC Address

Back 21

6 bytes

Identifies the sender of this frame

Front 22

Type

Back 22

2 bytes

Defines the type of protocol listed inside the frame; today, most likely identifies IP version 4 (IPv4) or IP version 6 (IPv6

Front 23

Data and Pad

Back 23

46–1500 bytes

Holds data from a higher layer, typically an L3PDU (usually an IPv4 or IPv6 packet). The sender adds padding to meet the minimum length requirement for this field (46 bytes).

Front 24

Frame Check Sequence (FCS)

Back 24

4

Provides a method for the receiving NIC to determine whether the frame experienced transmission errors

Front 25

MAC addresses aka

Back 25

unicast ethernet address