Week 1: IP & MAC PDU Format

Question 1

What is the Preamble of an IEEE802.3 MAC Frame made of?

Answer 1

Alternating 1’s & 0’s

Question 2

How many bytes long is the Preamble of an IEEE802.3 MAC Frame?

Answer 2

7 Bytes

Question 3

What is the Start Frame Delimiter (SDF) Binary value?

Answer 3

10101011

Question 4

How many bytes long is the SDF of an IEEE802.3 MAC Frame?

Answer 4

1 Byte

Question 5

How many bytes long is the Destination Address in an IEEE802.3 MAC Frame?

Answer 5

6 Bytes

Question 6

How many bytes long is the Source Address in an IEEE802.3 MAC Frame?

Answer 6

6 Bytes

Question 7

How many bytes long is the Length or Type field in an IEEE802.3 MAC Frame?

Answer 7

2 Bytes

Question 8

How many bytes long is the CRC Field in an IEEE802.3 MAC Frame?

Answer 8

4 Bytes

Question 9

What is the average byte length range of an IEEE802.3 MAC Frame?

Answer 9

64 to 1518 Bytes

Question 10

What fields compose an IEEE802.3 MAC Frame?

Answer 10

Preamble (7 Bytes)
SFD (1 Byte)
Destination Address (6 Bytes)
Source Address (6 Bytes)
Length or Type (2 Bytes)
Data & Padding (variable Byte length)
CRC (4 Bytes)

Question 11

How many Bytes are in a MAC Address?

Answer 11

6 Bytes (48 bits)

Question 12

What do the left 3 Bytes in a MAC Address indicate?

Answer 12

The vendor

Question 13

What do the right 3 Bytes in a MAC Address indicate?

Answer 13

Interface Card

this is Network Interface Controller (NIC) specific!

Question 14

What are the left 3 bytes in a Multicast MAC Address?

Answer 14

01:00:5E

Question 15

What is the MAC Address for a Broadcast?

Answer 15

FF:FF:FF:FF:FF:FF

Question 16

What is the min-max range of bytes for an IPv4 Datagram?

Answer 16

Min. 20 Bytes, Max 60 Bytes

Question 17

How many bits long is the Source IP Address field in an IPv4 Datagram?

Answer 17

32 Bits

Question 18

How many bits long is the Destination IP Address field in an IPv4 Datagram?

Answer 18

32 bits

Question 19

How many bits long is the Version field in an IPv4 Datagram?

Answer 19

4 bits

Question 20

How many bits long is the Header Length field in an IPv4 Datagram?

Answer 20

4 bits

Question 21

How many bits long is the Priority & Type of Service field in an IPv4 Datagram?

Answer 21

8 bits

Question 22

How many bits long is the Identification field in an IPv4 Datagram?

Answer 22

16 bits

Question 23

How many bits long is the Flag field in an IPv4 Datagram?

Answer 23

3 bits

Question 24

How many bits long is the Fragmented Offset field in an IPv4 Datagram?

Answer 24

13 bits

Question 25

How many bits long is the Time to Live field in an IPv4 Datagram?

Answer 25

8 bits

Question 26

How many bits long is the Protocol field in an IPv4 Datagram?

Answer 26

8 bits

Question 27

How many bits long is the Header Checksum field in an IPv4 Datagram?

Answer 27

16 bits

Question 28

How many bits long is the Options field in an IPv4 Datagram?

Answer 28

0 or 32 bits

Question 29

What field indicates the existence of optional headers in an IPv4 Datagram?

Answer 29

The Header Length field

Question 30

What value indicates the length of the optional field(s)?

Answer 30

Any value more than 5

Question 31

How many bits long is an IPv4 Address?

Answer 31

32 bits

Question 32

What does the IP Address define?

Answer 32

A unique and universal connection of a device to the Internet

Question 33

What is the total address space for IPv4?

Answer 33

2^32 or 4,294,967,296

Question 34

What are the notation types for IPv4 address?

Answer 34

Dotted-Decimal and Binary Notation

Question 35

What are the 5 Address Classes?

Answer 35

``` A (8 Network Bits, 24 Host Bits) B (16 Network Bits, 16 Host Bits) C (24 Network Bits, 8 Host Bits) D (Multicast) E (Research) ```

Question 36

What is the Default CIDR subnet mask for Class A Addresses?

Answer 36

/8 | 255.0.0.0

Question 37

What is the Default CIDR Subnet mask for Class B Addresses?

Answer 37

/16 | 255.255.0.0

Question 38

What is the Default CIDR Subnet mask for Class C Addresses?

Answer 38

/24 | 255.255.255.0

Question 39

What is the Multicast Address Range?

Answer 39

224.0.0.0 to 239.255.255.255

Question 40

What are the 2 subtypes of Unicast Addressing?

Answer 40

Public & Private

Question 41

What are the 4 properties of Private Addresses?

Answer 41

Private IP's are NOT routable through the Internet Secure Save IP Address Space Network Address Translation (NAT)

Question 42

For Reserved Addresses, what does an address of all 0's mean?

Answer 42

"This network or segment"

Question 43

For Reserved Addresses, what does an address of all 1's mean?

Answer 43

"All Networks"

Question 44

For Reserved Addresses, what does the address 127.0.0.1 mean?

Answer 44

Loopback tests

Question 45

For Reserved Addresses, what does a Node address of all 0's mean?

Answer 45

Interpreted to mean "network address" or any host on specified network

Question 46

For Reserved Addresses, what does a Node address of all 1's mean?

Answer 46

Interpreted to mean "all nodes" on the specified network

Question 47

For Reserved Addresses, what does a full IP address set to all 0's mean?

Answer 47

Used by Cisco Routers to designate the default route.

Question 48

For Reserved Addresses, what does a full IP address set to all 1's mean?

Answer 48

Same as broadcast to all nodes on the current network (255.255.255.255)

Question 49

What is the Address Range for Class A?

Answer 49

0 - 127

Question 50

What is the Address Range for Class B?

Answer 50

128 - 191

Question 51

What is the Address Range for Class C?

Answer 51

192 - 223

Question 52

What is the Address Range for Class D?

Answer 52

224 - 239

Question 53

What is the Address Range for Class E?

Answer 53

240 - 255

Question 54

What are the 3 Private Address Segments?

Answer 54

10. 0.0.0 /8 (10.0.0.0 - 10.255.255.255) 172. 16.0.0 /12 (172.16.0.0 - 172.16.255.255) 192. 168.0.0 /16 (192.168.0.0 - 192.168.255.255)