A+ Comparing IPv4 and IPv6 Quiz
Which of the following is a Class C IPv4 address? A. 10.1.2.3 B. 127.0.0.1 C. 172.16.5.4 D. 192.168.1.21
D (A. Incorrect: 10.1.2.3 is a Class A address, in the range of 1 to 126. B. Incorrect: 127.0.0.1 is the IPv4 loopback address. C. Incorrect: 172.16.5.4 is a Class B address in the range of 128 to 191. D. Correct: The first number in a Class C address is in the range of 192 to 223, and 192 is in this range.)
Which of the following is the loopback address for IPv6? A. 127.0.0.1 B. ::1 C. 192.168.1.1 D. 255.255.255.255
B (A. Incorrect: 127.0.0.1 is the IPv4 loopback address. B. Correct: The IPv6 loopback address is ::1. C. Incorrect: 192.168.1.1 is a valid IPv4 address but not the loopback address. D. Incorrect: 255.255.255.255 is the broadcast address.)
A system is unable to access any network resources. You check the IP address and see that it includes the following information: IP address: 169.254.34.78 Subnet mask: 255.255.0.0 Default gateway: blank What is the most likely problem? A. DHCP B. IP address is wrong C. Subnet mask is wrong D. Default gateway is down
A (A. Correct: An address starting with 169.254 is an Automatic Private IP Address (APIPA). A DHCP client will assign itself an APIPA address if it doesn't receive a response from DHCP. B. Incorrect: The IP address is correct as an APIPA address. C. Incorrect: The subnet mask is correct for APIPA. D. Incorrect: APIPA doesn't assign a default gateway.)
Which of the following would be appropriate to assign to a client in a private network? A. 10.1.1.1 B. 198.162.6.1 C. 173.16.2.3 D. 127.0.0.1
A (A. Correct: Only valid private IP addresses should be assigned to computers in a private network. A private IP address should be in one of the following ranges: 10.0.0.0-10.255.255.255, 172.16.0.0-172.31.255.255, 192.168.0.0-192.168.255.255. B. Incorrect: An IPv4 address starting with 198 is public. C. Incorrect: An IPv4 address starting with 173 is public. D. Incorrect: This is the IPv4 loopback address.)
A system has an IP address and subnet mask combination such as the following: 192.168.1.5 255.255.255.0 Which of the following would be a valid IP address for the default gateway? A. 255.255.255.255 B. 192.168.1.1 C. 192.168.15.1 D. 192.168.1.0
B (A. Incorrect: This is a broadcast address and should not be assigned to the default gateway. B. Correct: The default gateway must have the same network ID as other clients on the network. In this case, the network ID of the system is 192.168.1.0. If the default gateway is 192.168.1.1, it also has a network ID of 192.168.1.0. C. Incorrect: An IP address of 192.168.15.1 gives the default gateway a network ID of 192.168.15.0, which is different from the system's network ID. D. Incorrect: 192.168.1.0 is the network ID and should not be assigned to a client.)
Which of the following is a valid IPv6 address? A. FC00:0:0:76:0:0:042A:B95F:77F5 B. FC00::0157:03CE::A47:52AF C. FC00:76::4234:BF:F5 D. FC00:0000:1200:2076:0000:42A4:C95G:F523
C (A. Incorrect: An IPv6 address has eight groups of hexadecimal numbers separated by seven colons, but this has nine groups separated by eight colons. B. Incorrect: An IPv6 can use one set of double colons for zero compression, but not two. C. Correct: This is a valid IPv6 address using zero compression and omitting leading zeros. The full IPv6 address is FC00:0076:0000:0000:0000:4234:00BF:00F5. D. Incorrect: IPv6 addresses use hexadecimal numbers (0-9 and A-F). G is not a valid hexadecimal number.)
Which of the following would most often have manually assigned IP addresses? A. Windows 7-based computers in a SOHO B. Windows 7-based computers in a large domain C. Servers and network printers D. Servers and USB attached printers
C (A. Incorrect: Windows 7-based computers normally receive IP addresses automatically from DHCP. B. Incorrect: Windows 7-based computers normally receive IP addresses automatically from DHCP. C. Correct: Servers and network printers often have manually assigned IP addresses. D. Incorrect: A USB-attached printer does not use an IP address.)