Ethernet LAN Switching

Question 1

• Length – 7- byte (56 - bit)

Answer 1

Preamble

Question 2

10101010 * 7

Answer 2

Preamble

Question 2

Allows devices to synchronize their receiver clocks

Answer 2

Preamble

Question 3

Meaning of SFD

Answer 3

Start Frame Delimiter

Question 4

Length – 1 byte ( 8 - bit)

Answer 4

SFD

Question 5

10101011

Answer 5

SFD

Question 6

Marks the end of the preamble, and the
beginning of the rest of the frame

Answer 6

SFD

Question 7

Meaning of FCS

Answer 7

Frame Check Sequence

Question 8

• Indicate the devices sending and receiving the frame

Answer 8

Destination and Source

Question 9

Consist of the
________ and ________ “MAC address

Answer 9

Destination and Source

Question 10

Meaning of MAC

Answer 10

Media Access Control

Question 11

It is the 6 - byte ( 48 – bit) address of the physical device

Answer 11

MAC Address

Question 12

has a length of 2- byte (16 - bit) field

Answer 12

Type or Length

Question 13

A value of 1500 or less in this field indicate the length of the encapsulated packets (in bytes)

Answer 13

Type or Length

Question 14

• A value of 1536 or greater in this field indicates the ____ of the encapsulated packet

Answer 14

Type or Length

Question 15

What kind of IP has this hexadecimal:
0x0800?

Answer 15

IPv4

Question 16

What kind of IP has this hexadecimal:
0x86DD?

Answer 16

IPv6

Question 17

has a 4- byte (32-bit) length

Answer 17

FCS

Question 18

Detects corrupted data by running a “CRC” algorithm over the received data

Answer 18

FCS

Question 19

CRC stands for ?

Answer 19

Cyclic Redundancy Check or Cyclic Redundancy Codes

Question 20

The Ethernet Frame has a length of ____ bytes

Answer 20

26 - byte ( header + trailer)

Question 21

It is also known as a Burned –In Address (BIA)

Answer 21

MAC Address

Question 22

True or False

MAC Address is globally unique

MAC ADDRESS

Answer 22

True

Question 22

OUI stands for?

MAC ADDRESS

Answer 22

Organizationally Unique Identifier

Question 23

# Modified True or False The first 3 bytes are assigned by the **retailer** of the device ## Footnote MAC ADDRESS

Answer 23

maker or manufacturer

Question 24

# TRUE OR FALSE The last 3 bytes are unique to the device itself. ## Footnote MAC ADDRESS

Answer 24

TRUE