Analyzing Classful IPv4 Networks Flashcards

1
Q

What is a Class A?

A
Frst Octet 1-126
Purpose Unicast (large networks)
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2
Q

What is a Class B?

A
Frst Octet 128-191
Purpose Unicast (medium sized networks)
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3
Q

What is a Class C?

A
Frst Octet 192-223
Purpose Unicast (small networks)
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4
Q

What is a Class D?

A

Frst Octet 224-239

Purpose Multicast

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5
Q

What is a Class E?

A

Frst Octet 240-255

Purpose Experimental

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6
Q

True or False

The addresses in the same network have the same values in the network part.

A

True

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7
Q

True or False

The address in the same network have different values in the host part.

A

True

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8
Q

What is the formula to calculate the number of host addresses per Class A, B, or C network?

A

2^H -2

Where H is the number of Host bits

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9
Q

What are valid network numbers for Class A

A

1.0.0.0 - 126.0.0.0

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10
Q

What are valid network numbers for Class B

A

128.0.0.0 - 191.255.0.0

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11
Q

What are valid network numbers for Class C

A

192.0.0.0 - 223.255.255.0

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12
Q

How many total networks does a Class A have?

A

2^7-2 = 126

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13
Q

How many total networks does a Class B have?

A

2^14 = 16,384

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14
Q

How many total networks does a Class C have?

A

2^21 = 2,097,152

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15
Q

How many hosts does a Class A network have?

A

2^24 -2

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16
Q

How many hosts does a Class B network have?

A

2^16 -2

17
Q

How many hosts does a Class C network have?

A

2^8 - 2

18
Q

What is the default mask for a Class A?

A

255.0.0.0

19
Q

What is the default mask for a Class B?

A

255.255.0.0

20
Q

What is the default mask for a Class C?

A

255.255.0.0

21
Q

Which of the following are not valid Class A network IDs? (choose two)

a. 1.0.0.0
b. 130.0.0.0
c. 127.0.0.0
d. 9.0.0.0

A

b. 130.0.0.0

c. 127.0.0.0

22
Q

Which of the following are not valid Class B network IDs?

a. 130.0.0.0
b. 191.255.0.0
c. 128.0.0.0
d. 150.255.0.0
e. All are valid class B network IDs

A

e. All are valid class B network IDs

23
Q

Which of the following are true about IP address 172.16.99.45’s IP network? (select two)

a. The network ID is 172.0.0.0
b. The network is a Class B network
c. The default mask for the network is 255.255.255.0
d. The number of host bits in the unsubnetted network is 16

A

b. The network is a Class B network

d. The number of host bits in the unsubnetted network is 16

24
Q

Which of the following are true about IP address 192.168.6.7’s IP networks? (select two)

a. The network ID is 192.168.6.0
b. The network is a Class B network
c. The default mask for the network is 255.255.255.0
d. The number of host bits in the unsubnetted network is 16

A

a. The network ID is 192.168.6.0

c. The default mask for the network is 255.255.255.0

25
Q

Which of the following is a network broadcast address?

a. 10.1.255.255
b. 192.168.255.1
c. 224.1.1.255
d. 172.30.255.255

A

d. 172.30.255.255

26
Q

Which of the following is a Class A, B, or C network ID?

a. 10.1.0.0
b. 192.168.1.0
c. 127.0.0.0
d. 172.20.0.1

A

b. 192.168.1.0