Networking Fundamentals - Day 2

Which of the following IP addresses belongs to Class A?

• 128.0.0.1

• 10.10.10.1

• 172.16.0.1

• 192.168.0.1

Which class of IP addresses uses the default subnet mask 255.255.255.0?

• Class A

• Class B

• Class C

• Class D

How many hosts can a subnet with the mask 255.255.255.192 (/26) support?

• 62

• 64

• 126

• 254

Which subnet mask corresponds to /24 in CIDR notation?

• 255.0.0.0

• 255.255.0.0

• 255.255.255.0

• 255.255.255.252

Which IP range is reserved for APIPA (Automatic Private IP Addressing)?

• 10.0.0.0 – 10.255.255.255

• 169.254.0.0 – 169.254.255.255

• 192.168.0.0 – 192.168.255.255

• 172.16.0.0 – 172.31.255.255

APIPA is used when:

• DNS server fails

• DHCP server is unavailable

• Default gateway is incorrect

• Internet connection is active

Loopback IP addresses are used to:

• Test connectivity to a remote host

• Test the local TCP/IP stack

• Resolve domain names

• Assign public IPs

Which of the following is a private IP address?

• 8.8.8.8

• 172.16.10.1

• 203.0.113.1

• 11.11.11.11

Public IP addresses are assigned by:

• Local ISP

• IANA/Regional Internet Registries

• DHCP server only

• Router manufacturer

The CIDR notation 192.168.1.0/27 provides how many usable IP addresses?

• 16

• 30

• 32

• 62