CCNA Tutorial 1.7 – Private IPv4 Addressing
CCNA 1.7 – Private IPv4 Addressing – Quiz
Multiple Choice (20 questions)
- Which RFC defines private IPv4 address ranges?
- A) RFC 791
- B) RFC 1918
- C) RFC 950
- D) RFC 2460
- Which of these is a private Class A range?
- A) 1.0.0.0/8
- B) 10.0.0.0/8
- C) 11.0.0.0/8
- D) 12.0.0.0/8
- Which of these is a private Class B range?
- A) 172.16.0.0/12
- B) 172.32.0.0/12
- C) 192.168.0.0/16
- D) 224.0.0.0/4
- Which of these is a private Class C range?
- A) 192.0.2.0/24
- B) 192.168.0.0/16
- C) 198.18.0.0/15
- D) 203.0.113.0/24
- Which of the following is NOT a private IP address?
- A) 10.10.10.10
- B) 172.20.1.1
- C) 192.168.100.1
- D) 8.8.8.8
- What is the purpose of private IPv4 addresses?
- A) Provide globally routable addresses
- B) Allow internal communication within an organization
- C) Eliminate the need for NAT
- D) Replace IPv6
- Which of the following typically provides translation between private and public addresses?
- A) DNS
- B) NAT
- C) DHCP
- D) ARP
- Which private IP address range allows the most hosts?
- A) 10.0.0.0/8
- B) 172.16.0.0/12
- C) 192.168.0.0/16
- D) 169.254.0.0/16
- A company needs 500 hosts in a single subnet. Which private range would best fit?
- A) 10.0.0.0/8
- B) 172.16.0.0/12
- C) 192.168.0.0/16
- D) All of the above
- Which of these address ranges is reserved for link-local (APIPA), not private use?
- A) 10.0.0.0/8
- B) 169.254.0.0/16
- C) 172.16.0.0/12
- D) 192.168.0.0/16
- Which organization manages allocation of public IPv4 addresses?
- A) IANA
- B) IETF
- C) Cisco
- D) ISO
- Which type of IPv4 addresses are not routable on the public internet?
- A) Public
- B) Private
- C) Both
- D) Neither
- Which of these ranges is public, not private?
- A) 172.31.0.0/16
- B) 172.20.0.0/16
- C) 172.40.0.0/16
- D) 192.168.50.0/24
- Which of these is a valid use of private addressing?
- A) Home Wi-Fi networks
- B) Enterprise LANs
- C) Test environments
- D) All of the above
- If two companies use overlapping private address ranges and merge, which technology is often needed?
- A) VLANs
- B) NAT
- C) DHCP
- D) DNS
- Which of these subnets is the first subnet in the private Class B range?
- A) 172.15.0.0
- B) 172.16.0.0
- C) 172.32.0.0
- D) 172.31.255.0
- Which of these subnets is the last subnet in the private Class B range?
- A) 172.16.0.0
- B) 172.20.0.0
- C) 172.31.0.0
- D) 172.32.0.0
- What is the default subnet mask for the private Class B block 172.16.0.0?
- A) 255.0.0.0
- B) 255.255.0.0
- C) 255.255.240.0
- D) 255.255.255.0
- Which device function is most critical for enabling private IPv4 addresses to reach the internet?
- A) Switch forwarding
- B) NAT on the router/firewall
- C) DHCP on the server
- D) MAC address learning
- Which range is reserved for documentation and NOT private addressing?
- A) 198.51.100.0/24
- B) 172.16.0.0/12
- C) 192.168.0.0/16
- D) 10.0.0.0/8
Fill in the Blank (5 questions)
- The private Class A block is __________.
- The private Class B block is __________.
- The private Class C block is __________.
- Private IPv4 addresses are translated to public ones using __________.
- RFC __________ defines private IPv4 addressing.
CCNA 1.7 – Private IPv4 Addressing – Answer Key
- B) RFC 1918
- B) 10.0.0.0/8
- A) 172.16.0.0/12
- B) 192.168.0.0/16
- D) 8.8.8.8
- B) Allow internal communication within an organization
- B) NAT
- A) 10.0.0.0/8
- D) All of the above
- B) 169.254.0.0/16
- A) IANA
- B) Private
- C) 172.40.0.0/16
- D) All of the above
- B) NAT
- B) 172.16.0.0
- C) 172.31.0.0
- B) 255.255.0.0
- B) NAT on the router/firewall
- A) 198.51.100.0/24
- 10.0.0.0/8
- 172.16.0.0/12
- 192.168.0.0/16
- NAT
- 1918