IP CLASSES AND SUBNET MASK

identifies which portion of the IP address is the network address and which portion is the host address

• IP address
• subnet mask
• default gateway
• DNS server

Your boss wants you to set up three computers on a classful network with a default subnet mask of 255.0.0.0. What class does he want the computers to be set up on?

• Class A
• Class B
• Class C
• Class D

What is the default subnet mask for a Class B network?

• 255.0.0.0
• 255.255.0.0
• 255.255.255.0
• 255.255.255.255

For IPv4, what class is used for multicasting?

• A
• B
• C
• D

What is the maximum number of hosts you can use for each subnet that belongs to a class C address? 

• 128
• 254
• 256
• 65,534

What is the network portion of :
IP: 192.168.1.2
Subnet mask: 255.255.255.0

• 192
• 192.168
• 192.168.1
• 2

What is the host portion of :
IP: 192.168.1.2
Subnet mask: 255.255.255.0

• 192
• 192.168
• 192.168.1
• 2

The range of first octets in a class A IP address is 

• 0-127
• 1 - 128
• 1 - 256
• 10 - 128

What class is 207.21.54.25

• A
• B
• C
• D

Which address is legal

• 12.1.2.2
• 645.250.2.4
• 198.261.34.2
• 201.165.321.1