Day 05 Flashcards - Ethernet LAN Switching (Part 1)

Question 1

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

Answer 1

unicast

Question 2

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

Answer 2

12

Question 3

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

Answer 3

Dynamic MAC address (Dynamically learned MAC address)

Question 4

A switch will flood an […] unicast frame.

Answer 4

unknown

Question 5

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

Answer 5

1536

Question 6

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

Answer 6

1500

Question 7

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

Answer 7

5 minutes

Question 8

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

Answer 8

6

Question 9

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

Answer 9

7

Question 10

Ethernet header ‘SFD’ = […] byte(s)

Answer 10

1

Question 11

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

Answer 11

6

Question 12

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

Answer 12

2

Question 13

Ethernet trailer ‘FCS’ = […] byte(s)

Answer 13

4

Question 14

Hexadecimal A = Decimal […]

Answer 14

10

Question 15

Hexadecimal B = Decimal […]

Answer 15

11

Question 16

Hexadecimal C = Decimal […]

Answer 16

12

Question 17

Hexadecimal D = Decimal […]

Answer 17

13

Question 18

Hexadecimal E = Decimal […]

Answer 18

14

Question 19

Hexadecimal F = Decimal […]

Answer 19

15

Question 20

How long is a MAC address? = […] bits

Answer 20

48

Question 21

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

Answer 21

6

Question 22

The first 3 bytes of a MAC address are the […]

Answer 22

OUI (Organizationally Unique Identifier)

Question 23

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

Answer 23

3

Question 24

What are the 5 fields of an Ethernet header?

Answer 24

Preamble, SFD, Destination, Source, Type/Length

Question 25

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

Answer 25

Frame Check Sequence

Question 26

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

Answer 26

Start Frame Delimiter

Question 27

What does a switch do with an unknown unicast frame?

Answer 27

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

Question 28

What does MAC stand for?

Answer 28

Media Access Control

Question 29

What is another name for a MAC address?

Answer 29

BIA (Burned-In Address)

Question 30

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

Answer 30

10101010

Question 31

What is the bit pattern of the Ethernet SFD?

Answer 31

10101011

Question 32

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

Answer 32

0x0800

Question 33

What is the Ethernet Type value for IPv6? (in hexadecimal)

Answer 33

0x86DD

Question 34

What is the only field in an Ethernet trailer?

Answer 34

FCS (Frame Check Sequence)

Question 35

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

Answer 35

26

Question 36

What kind of algorithm does the Ethernet FCS use?

Answer 36

CRC (Cyclic Redundancy Check)

Question 37

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

Answer 37

Source MAC Address

Question 38

Which field of an Ethernet header is used for synchronization?

Answer 38

Preamble

Question 39

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

Answer 39

SFD