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CCNA > Day 10 Flashcards - IPv4 Header > Flashcards

Day 10 Flashcards - IPv4 Header

1
Q

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

A

0

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2
Q

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

A

4 (binary 0100)

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3
Q

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

A

6 (binary 0110)

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4
Q

IPv4 header ‘Flags’ field:
Bit […] = DF bit

A

1

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5
Q

IPv4 header ‘Flags’ field:
Bit […] = MF bit

A

2

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6
Q

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

A

0

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7
Q

IPv4 header ‘Flags’ field:
What does ‘DF bit’ stand for?

A

Don’t Fragment bit

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8
Q

IPv4 header ‘Flags’ field:
What does ‘MF bit’ stand for?

A

More Fragments bit

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9
Q

IPv4 header ‘Protocol’ field:
Value of 1 = […]

A

ICMP

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10
Q

IPv4 header ‘Protocol’ field:
Value of 17 = […]

A

UDP

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11
Q

IPv4 header ‘Protocol’ field:
Value of 6 = […]

A

TCP

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12
Q

IPv4 header ‘Protocol’ field:
Value of 89 = […]

A

OSPF

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13
Q

IPv4 header ‘Protocol’ field:
Value of […] = ICMP

A

1

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14
Q

IPv4 header ‘Protocol’ field:
Value of […] = OSPF

A

89

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15
Q

IPv4 header ‘Protocol’ field:
Value of […] = TCP

A

6

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16
Q

IPv4 header ‘Protocol’ field:
Value of […] = UDP

A

17

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17
Q

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

A

Identification

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18
Q

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

A

16

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19
Q

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

A

32

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20
Q

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

A

6

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21
Q

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

A

2

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22
Q

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

A

3

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23
Q

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

A

13

24
Q

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

A

16

25
Q

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

A

4

26
Q

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

A

8

27
Q

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

A

32

28
Q

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

A

16

29
Q

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

A

8

30
Q

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

A

4-byte (32 bit)

31
Q

IPv4 header: What does ‘DSCP’ stand for?

A

Differentiated Services Code Point

32
Q

IPv4 header: What does ‘ECN’ stand for?

A

Explicit Congestion Notification

33
Q

IPv4 header: What does ‘IHL’ stand for?

A

Internet Header Length

34
Q

IPv4 header: What does ‘TTL’ stand for?

A

Time to Live

35
Q

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

A

320 bits / 40 bytes

36
Q

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

A

65,535

37
Q

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

A

15

38
Q

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

A

0 bits

39
Q

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

A

20 (=IPv4 header with no encapsulated data)

40
Q

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

A

5

41
Q

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

A

Protocol

42
Q

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

A

Total Length

43
Q

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

A

Header Checksum

44
Q

IPv4 header: Which field is used to identify which packet a fragment belongs to?

A

Identification

45
Q

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

A

Fragment Offset

46
Q

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

A

TTL

47
Q

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

A

DSCP

48
Q

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

A

ECN

49
Q

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

A

MTU (Maximum Transmission Unit)

50
Q

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

A

4

51
Q

The MTU is usually […] bytes.

A

1500

52
Q

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

A

64

53
Q

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

A

0

54
Q

What does ‘MTU’ stand for?

A

Maximum Transmission Unit

55
Q

What is the maximum length of the IPv4 header?

A

60 bytes

56
Q

What is the minimum length of the IPv4 header?

A

20 bytes

CCNA (15 decks)

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