Day 05 Flashcards - Ethernet LAN Switching (Part 1)

Question 1

Front

Answer 1

Back

Question 2

What is the only field in an Ethernet trailer?

Answer 2

FCS (Frame Check Sequence)

Question 3

What are the 5 fields of an Ethernet header?

Answer 3

Preamble, SFD, Destination, Source, Type/Length

Question 4

What does ‘SFD’ in an Ethernet header stand for?

Answer 4

Start Frame Delimiter

Question 5

What does ‘FCS’ in an Ethernet frame stand for?

Answer 5

Frame Check Sequence

Question 6

Ethernet header ‘Preamble’ = […] byte(s)

Answer 6

7

Question 7

Ethernet header ‘SFD’ = […] byte(s)<br></br>

Answer 7

1

Question 8

Ethernet header ‘Destination’ = […] byte(s)<br></br>

Answer 8

6

Question 9

Ethernet header ‘Source’ = […] byte(s)<br></br>

Answer 9

6

Question 10

Ethernet header ‘Type/Length’ = […] byte(s)<br></br>

Answer 10

2

Question 11

Ethernet trailer ‘FCS’ = […] byte(s)<br></br>

Answer 11

4

Question 12

Which field of an Ethernet header is used for synchronization?

Answer 12

Preamble

Question 13

What is the bit pattern of one byte in the Ethernet preamble?

Answer 13

10101010

Question 14

What is the bit pattern of the Ethernet SFD?

Answer 14

10101011

Question 15

Which field of an Ethernet header marks the end of the preamble?

Answer 15

SFD

Question 16

What does MAC stand for?

Answer 16

Media Access Control

Question 17

How long is a MAC address? = […] bytes

Answer 17

6

Question 18

How long is a MAC address? = […] bits<br></br>

Answer 18

48

Question 19

A value of […] or less in the Type/Length field indicates Length.

Answer 19

1500

Question 20

A value of […] or greater in the Type/Length field indicates Type.<br></br>

Answer 20

1536

Question 21

What is the Ethernet Type value for IPv4? (in hexadecimal)

Answer 21

0x0800

Question 22

What is the Ethernet Type value for IPv6? (in hexadecimal)<br></br>

Answer 22

0x86DD

Question 23

What kind of algorithm does the Ethernet FCS use?

Answer 23

CRC (Cyclic Redundancy Check)

Question 24

What is the total size of the Ethernet header + trailer? = […] bytes

Answer 24

26

Question 25

What is another name for a MAC address?

Answer 25

BIA (Burned-In Address)

Question 26

The first […] bytes of a MAC address are the OUI.

Answer 26

3

Question 27

The first 3 bytes of a MAC address are the […]<br></br>

Answer 27

OUI (Organizationally Unique Identifier)

Question 28

A MAC address is written as […] hexadecimal characters.

Answer 28

12

Question 29

Hexadecimal A = Decimal […]

Answer 29

10

Question 30

Hexadecimal B = Decimal […]<br></br>

Answer 30

11

Question 31

Hexadecimal C = Decimal […]<br></br>

Answer 31

12

Question 32

Hexadecimal D = Decimal […]<br></br>

Answer 32

13

Question 33

Hexadecimal E = Decimal […]<br></br>

Answer 33

14

Question 34

Hexadecimal F = Decimal […]<br></br>

Answer 34

15

Question 35

A […] frame is a frame destined for a single target.

Answer 35

unicast

Question 36

A MAC address learned by a switch without manual configuration is called a …

Answer 36

Dynamic MAC address (Dynamically learned MAC address)

Question 37

What does a switch do with an unknown unicast frame?

Answer 37

Floods it out all ports (except the one it was received on)

Question 38

A switch will flood an […] unicast frame.

Answer 38

unknown

Question 39

By default, a dynamic MAC address will be removed from the MAC address table after [time] of inactivity.

Answer 39

5 minutes

Question 40

Which field of an Ethernet frame does a switch use to learn and populate its MAC address table?

Answer 40

Source MAC Address