Day 10 Flashcards - IPv4 Header

Question 1

Front

Answer 1

Back

Question 2

The IPv4 header ‘Version’ field is […] bits in length.

Answer 2

4

Question 3

A value of […] in the IP header ‘Version’ field indicates IP version 4.

Answer 3

4 (binary 0100)

Question 4

A value of […] in the IP header ‘Version’ field indicates IP version 6.<br></br>

Answer 4

6 (binary 0110)

Question 5

IPv4 header: What does ‘IHL’ stand for?

Answer 5

Internet Header Length

Question 6

IPv4 header: The ‘IHL’ field is […] bits in length.<br></br>

Answer 6

4

Question 7

IPv4 Header: The IHL field specifies the length of the header in […] increments.

Answer 7

4-byte (32 bit)

Question 8

IPv4 header: What is the minimum value of the IHL field?

Answer 8

5

Question 9

IPv4 header: What is the maximum value of the IHL field?<br></br>

Answer 9

15

Question 10

What is the maximum length of the IPv4 header?

Answer 10

60 bytes

Question 11

What is the minimum length of the IPv4 header?

Answer 11

20 bytes

Question 12

IPv4 header: What does ‘DSCP’ stand for?

Answer 12

Differentiated Services Code Point

Question 13

IPv4 header: The ‘DSCP’ field is […] bits in length.

Answer 13

6

Question 14

IPv4 header: Which field is used to prioritize delay-sensitive network traffic?

Answer 14

DSCP

Question 15

IPv4 header: What does ‘ECN’ stand for?

Answer 15

Explicit Congestion Notification

Question 16

IPv4 header: The ‘ECN’ field is […] bits in length.

Answer 16

2

Question 17

IPv4 header: Which field provides end-to-end notification of network congestion?

Answer 17

ECN

Question 18

IPv4 header: The ‘Total Length’ field is […] bits in length.

Answer 18

16

Question 19

IPv4 header: Which field indicates the total length of the packet?

Answer 19

Total Length

Question 20

IPv4 header: What is the minimum value of the ‘Total Length’ field?

Answer 20

20 (=IPv4 header with no encapsulated data)

Question 21

IPv4 header: What is the maximum value of the ‘Total Length’ field?<br></br>

Answer 21

65,535

Question 22

IPv4 header: The ‘Identification’ field is […] bits in length.

Answer 22

16

Question 23

IPv4 header: Which field is used to identify which packet a fragment belongs to?<br></br>

Answer 23

Identification

Question 24

IPv4 header: All fragments of the same packet will have the same value in the […] field.

Answer 24

Identification

Question 25

IPv4 packets are fragmented if they are larger than the [...]

Answer 25

MTU (Maximum Transmission Unit)

Question 26

What does 'MTU' stand for?

Answer 26

Maximum Transmission Unit

Question 27

The MTU is usually [...] bytes.

Answer 27

1500

Question 28

IPv4 header: The 'Flags' field is [...] bits in length.

Answer 28

3

Question 29

Unfragmented IPv4 packets will always have the MF bit set to [...]

Answer 29

0

Question 30

IPv4 header 'Flags' field:

Bit [...] = Reserved, always set to 0

Answer 30

0

Question 31

IPv4 header 'Flags' field:

Bit [...] = DF bit

Answer 31

1

Question 32

IPv4 header 'Flags' field:

Bit [...] = MF bit

Answer 32

2

Question 33

IPv4 header 'Flags' field:

What does 'DF bit' stand for?

Answer 33

Don't Fragment bit

Question 34

IPv4 header 'Flags' field:

What does 'MF bit' stand for?

Answer 34

More Fragments bit

Question 35

IPv4 header: The 'Fragment Offset' field is [...] bits in length.

Answer 35

13

Question 36

IPv4 header: Which field is used to indicate the position of a fragment within an original, unfragmented IP packet?

Answer 36

Fragment Offset

Question 37

IPv4 header: the 'TTL' field is [...] bits in length.

Answer 37

8

Question 38

The recommended default TTL of an IPv4 packet is [...]

Answer 38

64

Question 39

A router will drop a packet with a TTL of [...]

Answer 39

0

Question 40

IPv4 header: Which field is used to prevent infinite routing loops?

Answer 40

TTL

Question 41

IPv4 header: What does 'TTL' stand for?

Answer 41

Time to Live

Question 42

IPv4 header: The 'Protocol' field is [...] bits in length.

Answer 42

8

Question 43

IPv4 header: Which field indicates the protocol of the encapsulated L4PDU?

Answer 43

Protocol

Question 44

IPv4 header 'Protocol' field: 

Value of [...] = TCP

Answer 44

6

Question 45

IPv4 header 'Protocol' field: 

Value of 6 = [...]

Answer 45

TCP

Question 46

IPv4 header 'Protocol' field: 

Value of [...] = UDP

Answer 46

17

Question 47

IPv4 header 'Protocol' field: 

Value of 17 = [...]

Answer 47

UDP

Question 48

IPv4 header 'Protocol' field: 

Value of 1 = [...]

Answer 48

ICMP

Question 49

IPv4 header 'Protocol' field: 

Value of [...] = ICMP

Answer 49

1

Question 50

IPv4 header 'Protocol' field: 

Value of 89 = [...]

Answer 50

OSPF

Question 51

IPv4 header 'Protocol' field: 

Value of [...] = OSPF

Answer 51

89

Question 52

IPv4 header: the 'Checksum' field is [...] bits in length.

Answer 52

16

Question 53

IPv4 header: Which field is used to check for errors in the header?

Answer 53

Header Checksum

Question 54

IPv4 header: the 'Source IP Address' field is [...] bits in length.

Answer 54

32

Question 55

IPv4 header: the 'Destination IP Address' field is [...] bits in length.

Answer 55

32

Question 56

IPv4 header: What is the minimum length of the 'Options' field?

Answer 56

0 bits

Question 57

IPv4 header: What is the maximum length of the 'Options' field?

Answer 57

320 bits  /  40 bytes