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Comptia Network+ MP N10-007 > Final Exam - IPv4 Review > Flashcards

Final Exam - IPv4 Review Flashcards

1
Q

1 How many bits are in an IPv4 address?

A

32 bit

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2
Q

2 How is a dotted decimal IPv4 address organized?

A

4 8 bit number divided by a .

  1. 1.1.1
  2. 5.5.5
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3
Q

What are the minimum and maximum values in an IPv4 octet?

A

Min is 0

max is 255

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4
Q

What are the minimum and maximum values for of the first octets for Classes A

A
  1. to 126.
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5
Q

What are the minimum and maximum values for of the first octets for Classes, B,

A
  1. to 191.
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6
Q

What are the minimum and maximum values for of the first octets for Classes , C,

A
  1. to 223.
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7
Q

What are the minimum and maximum values for of the first octets for Classes C, D,

A

First octet value range from 224 to 239

Range: 224.0.0.0 to 239.255.255.255

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8
Q

What are the minimum and maximum values for of the first octets for Classes E?

A

First octet value range from 240 to 255

Range: 240.0.0.0 to 255.255.255.255

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9
Q

What are the High Order Bits in the first octet for Classes A, B, C, D, & E?

A

Table 3.7. Address Class and Range
Class, High-Order Bits, 1st Octet Range

A, 0, 1–126

B, 10, 128–191

C, 110, 192–223

D, 1110, 224–239

E, 11110, 240–255

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10
Q

What is the purpose of each class of IPv4 addresses?

A

to divide networks based on need of networks and hosts.
Class A: large number of hosts and small number of networks needed.
Class C: small number of hosts but large number of networks needed.
Class B: somewhere in the middle / balance of number networks and hosts needed.

Class D: multicast
Clkass E: experimental

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11
Q

What is the default subnet mask for a Class A, IPv4 address?

A

255.0.0.0

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12
Q

What is the default subnet mask for a Class B, IPv4 address?

A

255.255.0.0

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13
Q

What is the default subnet mask for a Class C IPv4 address?

A

255.255.255.0

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14
Q

How many bits are in a binary subnet mask?

A

32 bits

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15
Q

What is the purpose of a subnet mask?

A

What is the purpose of subnet mask?
A subnet mask is used to divide an IP address into two parts. One part identifies the host (computer), the other part identifies the network to which it belongs.

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16
Q

What is the formula for calculating subnets?

A

To calculate the number of possible subnets, use the formula 2n, where n equals the number of host bits borrowed. For example, if three host bits are borrowed, then n=3. 23 = 8, so eight subnets are possible if three host bits are borrowed.

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17
Q

What is the formula for calculating hosts?

A

Remember that the formula for determining the number of hosts a network supports is 2n-2, where n is the number of bits used for the host.

18
Q

Identify ranges for Private IPv4 addresses?

Class A

A

10.0.0.0 – 10.255.255.255 (16,777,216 IP addresses)

19
Q

Identify ranges for Private IPv4 addresses?

Class B

A

172.16.0.0 – 172.31.255.255 (1,048,576 IP addresses)

20
Q

Identify ranges for Private IPv4 addresses?

Class C

A

192.168.0.0 – 192.168.255.255 (65,536 IP addresses)

21
Q

Why were Private IPv4 addresses identified?

A

Private IP address spaces were originally defined to assist in delaying IPv4 address exhaustion. IP packets originating from or addressed to a private IP address cannot be routed through the public Internet.

22
Q

What are 2 uses for the IPv4 address 127.0.0.1?

A

Loopback

troubshooting

23
Q

True or False: All devices: peripherals, hosts and router interfaces on the same subnet have
the same Subnet ID and Subnet Mask?

A

true

24
Q

What is a network prefix?

A

the network portion of the address. The host is the other part

25
Q

How is network prefix related to the subnet mask?

A

The subnet mask defines the network prefix

26
Q

What is the binary subnet mask if the network prefix /26?

A

1111 1111 1111 1111 1111 1111 1100 0000

27
Q

What is the dotted decimal subnet mask if the network prefix is /26?

A

255.255.255.192

28
Q

In subnetting a Class C network, how is the Increment determined?

A

starting at 128, 64, 32, etc… add together for each bit borrowed

29
Q

What is the Increment when subnetting?

A

The Increment. By definition, the process of subnetting creates several smaller classless subnets out of one larger classful one. The spacing between these subnets, or how many IP addresses apart they are, is called the Increment

30
Q

What is the prefix when the subnet mask is 255.255.255.240?

A

/28

31
Q

What is the prefix when the binary subnet mask is 11111111.11111111.11111111.11111000?

A

/29

32
Q

If a subnet needs to accommodate 100 hosts, how many host bits are required?

A

7

33
Q

If the broadcast address is 199.85.50.97/27, what is the subnet ID for this address?

A

199.85.50.96

34
Q

What are the number of usable hosts on a subnet with 6 host bits?

A

62

35
Q

What are the number of usable hosts on a subnet with 3 host bits?

A

6

36
Q

What prefix corresponds to the CIDR block prefix 255.255.255.248?

A

/29

37
Q

Is the address 201.201.201.201/26 a Subnet ID, a Broadcast or a valid host?

A

valid host

38
Q

What is the Subnet #

A

3

39
Q

What is the Subnet ID

A

201.201.201.192

40
Q

Identify the Private Address:

  1. 100.75.50
  2. 188.75.50
  3. 17.33.10
  4. 200.200.11
A

172.17.33.10

41
Q

Identify the invalid IPv4 addresses:

  1. 6.7.8
  2. 300.4.55
  3. 111.2.1
  4. ABC.223
A
  1. 300.4.55

222. 111.2.1

42
Q

What is the Increment with the subnet mask is 255.255.255.192?

A

64

Comptia Network+ MP N10-007 (9 decks)

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