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CCNA > Day 10 Flashcards - IPv4 Header > Flashcards

Day 10 Flashcards - IPv4 Header

1
Q

Front

A

Back

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2
Q

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

A

4

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3
Q

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

A

4 (binary 0100)

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4
Q

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

A

6 (binary 0110)

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5
Q

IPv4 header: What does ‘IHL’ stand for?

A

Internet Header Length

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6
Q

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

A

4

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7
Q

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

A

4-byte (32 bit)

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8
Q

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

A

5

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9
Q

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

A

15

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10
Q

What is the maximum length of the IPv4 header?

A

60 bytes

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11
Q

What is the minimum length of the IPv4 header?

A

20 bytes

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12
Q

IPv4 header: What does ‘DSCP’ stand for?

A

Differentiated Services Code Point

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13
Q

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

A

6

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14
Q

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

A

DSCP

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15
Q

IPv4 header: What does ‘ECN’ stand for?

A

Explicit Congestion Notification

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16
Q

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

A

2

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17
Q

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

A

ECN

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18
Q

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

A

16

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19
Q

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

A

Total Length

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20
Q

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

A

20 (=IPv4 header with no encapsulated data)

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21
Q

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

A

65,535

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22
Q

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

A

16

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23
Q

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

A

Identification

24
Q

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

A

Identification

25
Q

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

A

MTU (Maximum Transmission Unit)

26
Q

What does ‘MTU’ stand for?

A

Maximum Transmission Unit

27
Q

The MTU is usually […] bytes.

A

1500

28
Q

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

A

3

29
Q

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

A

0

30
Q

IPv4 header ‘Flags’ field:<div>Bit […] = Reserved, always set to 0</div>

A

0

31
Q

IPv4 header ‘Flags’ field:<div>Bit […] =DF bit</div>

A

1

32
Q

IPv4 header ‘Flags’ field:<div>Bit […] =MF bit</div>

A

2

33
Q

IPv4 header ‘Flags’ field:<div>What does ‘DF bit’ stand for?</div>

A

Don’t Fragment bit

34
Q

IPv4 header ‘Flags’ field:<div>What does ‘MF bit’ stand for?</div>

A

More Fragments bit

35
Q

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

A

13

36
Q

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

A

Fragment Offset

37
Q

IPv4 header: the ‘TTL’ field is […] bits in length.

A

8

38
Q

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

A

64

39
Q

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

A

0

40
Q

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

A

TTL

41
Q

IPv4 header: What does ‘TTL’ stand for?

A

Time to Live

42
Q

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

A

8

43
Q

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

A

Protocol

44
Q

IPv4 header ‘Protocol’ field:<div>Value of […] = TCP</div>

A

6

45
Q

IPv4 header ‘Protocol’ field:<div>Value of 6 = […]</div>

A

TCP

46
Q

IPv4 header ‘Protocol’ field:<div>Value of […] = UDP</div>

A

17

47
Q

IPv4 header ‘Protocol’ field:<div>Value of 17 = […]</div>

A

UDP

48
Q

IPv4 header ‘Protocol’ field:<div>Value of 1 = […]</div>

A

ICMP

49
Q

IPv4 header ‘Protocol’ field:<div>Value of […] = ICMP</div>

A

1

50
Q

IPv4 header ‘Protocol’ field:<div>Value of 89 = […]</div>

A

OSPF

51
Q

IPv4 header ‘Protocol’ field:<div>Value of […] = OSPF</div>

A

89

52
Q

IPv4 header: the ‘Checksum’ field is […] bits in length.

A

16

53
Q

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

A

Header Checksum

54
Q

IPv4 header: the ‘Source IP Address’ field is […] bits in length.

A

32

55
Q

IPv4 header: the ‘Destination IP Address’ field is […] bits in length.<br></br>

A

32

56
Q

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

A

0 bits

57
Q

IPv4 header: What is the maximum length of the ‘Options’ field?<br></br>

A

320 bits / 40 bytes

CCNA (10 decks)

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