Part 1 : Chapter 2 (Fundamentals of Ethernet LANs)

Question 1

Pin placement difference between Straight-Through and Crossover Cable?

Answer 1

Pins 1 and 2 on one end of the cable connect to pen 3 and 6 on the other end of the cable.

Question 2

10BASE-T

Answer 2

Ethernet
10 Mbps
802.3
Copper
100m

Question 3

100BASE-T

Answer 3

Fast Ethernet
1000 Mbps
802.3u
Copper
100m

Question 4

802.3

Answer 4

10BASE-T

Ethernet

Question 5

802.3u

Answer 5

100BASE-T

Fast Ethernet

Question 6

802.3z

Answer 6

1000BASE-LX

Gig Ethernet

Question 7

1000BASE-T

Answer 7

Gig Ethernet
1000 Mbps
802.3ab
Copper
100m

Question 8

1000BASE-LX

Answer 8

Gig Ethernet
1000 Mbps
802.3z
Fiber
5km

Question 9

10GBASE-T

Answer 9

10 Gig Ethernet
10 Gbps
802.3an
Copper
100m

Question 10

802.3ab

Answer 10

1000BASE-T

Gig Ethernet

Question 11

802.3an

Answer 11

10GBASE-T

10 Gig Ethernet

Question 12

GBIC

Answer 12

GIGABIT ETHERNET INTERFACE CONVERTER

Original form factor for a removable transceiver for Gigabit interfaces larger than SFPs

Question 13

SFP

Answer 13

SMALL FORM PLUGGABLE

GBIC replacement

Question 14

SFP+

Answer 14

SMALL FORM PLUGGABLE PLUS

Used on 10 Gig Ethernet

Question 15

NICs Transmits Pins?

Answer 15

1 and 2

Question 16

Routers Transmits Pins?

Answer 16

1 and 2

Question 17

WAP Transmits Pins?

Answer 17

1 and 2

Question 18

Hubs Transmits Pins?

Answer 18

3 and 6

Question 19

Switches Transmits Pins?

Answer 19

3 and 6

Question 20

PC to Switch (Pins)

Answer 20

Straight-Through

Question 21

Switch to Switch (Pins)

Answer 21

Crossover Cables

Question 22

PC to PC (Pins)

Answer 22

Crossover Cables

Question 23

Name components of a Fiber-Optic Cable (Out to In)

Answer 23

Outer Jacket
Strengthener
Buffer
Cladding
Core

Question 24

MM Fiber vs SM Fiber

Answer 24

MM - Allows for multiple angels, Improved distances, less expensive

SM - Smaller Diameter, sends light at single angle.

Question 25

Describe Preamble

Answer 25

7 Bytes

Synchronization

Question 26

Describe SFD

Answer 26

START FRAME DELIMITER
1 byte
Signifies that the next byte is the Destination MAC.

Question 27

Describe Destination MAC Address

Answer 27

6 Bytes

ID’s Recipient

Question 28

Describe Source MAC Address

Answer 28

6 Bytes

ID’s Sender

Question 29

Describe Type

Answer 29

2 Bytes

IPv4 or IPv6

Question 30

Describe Data and Pad

Answer 30

46-1500 bytes

Holds high level data and pads

Question 31

Describe FCS

Answer 31

FRAME CHECK SEQUENCE
4 bytes
Method to determine error checking

Question 32

Unicast

Answer 32

Refers to MAC address going to just one device

Question 33

Broadcast

Answer 33

Frames sent to all devices on LAN

FFFF.FFFF.FFFF

Question 34

Multicase

Answer 34

Frames sent to all devices on LAN allowing packets

Question 35

Broadcast vs Multicast

Answer 35

Broadcast - Frames sent to all devices allowing frames.

Multicast - Frames sent to all devices

Question 36

OUI

Answer 36

ORGANIZED UNIQUE IDENTIFIER

First 24 bits of MAC Address

Question 37

Full Duplex vs Half Duplex

Answer 37

NIC Feature
Full - Receives and Sends data at same time
Half - Does NOT receive and send at same time

Question 38

Describe Hub

Answer 38

Dumb device, just repeats itself to all devices BUT the one that sent to original message.

Question 39

CSMA/CD

Answer 39

CARRIER SENSE MULTIPLE ACCESS WITH COLLISION DETECTION

Needed with Hubs

Question 40

Describe Ethernet Shared Media

Answer 40

Network designs that use hubs, CSMA/CD

Question 41

Describe Ethernet point-to-point

Answer 41

In a network built with switches, each link works independently of each other.