IP Addressing

What is the network address for IP 192.168.1.50/24?

• 192.168.1.0
• 192.168.1.50
• 192.168.1.255
• 192.168.0.0

Answer explanation

The /24 subnet mask means the network address is the first address in the range, which is 192.168.1.0.

What is the network address for IP 10.0.5.200/22?

• 10.0.5.0
• 10.0.4.0
• 10.0.6.0
• 10.0.7.0

Answer explanation

The /22 subnet mask groups addresses in blocks of 1024; the network address is the first in the block, 10.0.4.0.

What is the valid network address for IP 172.16.14.101/20?

• 172.16.14.0
• 172.16.8.0
• 172.16.12.0
• 172.16.16.0

Answer explanation

A /20 subnet mask groups addresses in increments of 4096; the valid network is the closest lower boundary, 172.16.8.0

Which network does IP address 198.51.100.75/26 belong to?

• 198.51.100.64
• 198.51.100.128
• 198.51.100.32
• 198.51.100.96

Answer explanation

A /26 mask divides networks into blocks of size 64; the network containing .75 starts at .64 and ends at .127

What is the network ID for IP address 203.0.113.145/27?

• 203.0.113.128
• 203.0.113.144
• 203.113.1.145
• None of these

What is the network address for IP address 192.168.10.45/26?

• 192.168.10.0
• 192.168.10.64
• 192.168.10.128
• 192.168.10.192

Answer explanation

The /26 mask divides addresses into blocks of 64; the address belongs to the network starting at .64.

An IP address 10.10.5.200/20 belongs to which network?

• 10.10.0.0
• 10.10.4.0
• 10.10.5.0
• 10.10.8.0

Answer explanation

The /20 mask groups addresses into blocks of 4096; the network starts at the nearest lower boundary, .4.

Determine the network address for 172.16.50.67/24?

• 172.16.50.0
• 172.16.50.64
• 172.16..50..128
• 172..16..50..255

Answer explanation

A /24 mask uses the first three octets for the network address, so it is .50..0

What is the network address for IP address 192.168.15.75/28?

• 192.168.15.64
• 192.168.15.0
• 192.168.15.128
• 192.168.15.48

Answer explanation

A /28 mask divides addresses into blocks of 16; the address belongs to the block starting at .64.

An IP address 172.16.8.200/21 belongs to which network?

• 172.16.8.0
• 172.16.0.0
• 172.16.16.0
• 172.16.12.0

Answer explanation

The /21 mask groups addresses into blocks of 2048; the network starts at the nearest lower boundary, .8