1. Which of the following addresses is not allowed on the Internet? 1. D. The addresses in the range 172.16.0.0 through
172.31.255.255 are all considered private, based on RFC 1918. Use of these addresses on the Internet is prohibited so that they can be used simultaneously in different administrative domains without concern for conflict. Some experts in the industry believe these addresses are not routable, which is not true. 2. A host automatically configured with an address from which of the following ranges indicates an
inability to contact a DHCP server? 2. B. APIPA uses the link-local private address range of 169.254.0.0 through 169.254.255.255 and a subnet mask of 255.255.0.0 (see RFC 3330). APIPA addresses are
used by DHCP clients that cannot contact a DHCP server and have no static alternate configuration. These addresses are not Internet routable and cannot, by default, be used across routers on an internetwork. 3. Which statement regarding private IP addresses is most accurate? 3. C. Private IP addresses are not routable over the Internet, as either source or destination addresses. Because of that fact, any entity that wishes to use such addresses internally can do so without causing
conflicts with other entities and without asking permission of any registrar or service provider. Despite not being allowed on the Internet, private IP addresses are fully routable on private intranets. 4. Which of the following is a valid Class A address? 4. D. The Class A range is 1 through 126 in the first octet/byte, so this makes option B incorrect. Only option D is a valid Class A address. 5. Which of the following is a valid Class B address? 5. C. The Class B range is 128 through 191 in the first octet/byte. Only option C is a valid Class B address. 6. Which of the following describes a broadcast address? 6. B. If you turned on all host bits (all of the host bits are 1s), this would be a broadcast address for that network. 7. Which of the following is a Layer 2 broadcast? 7. B. A Layer 2 broadcast is also referred to as a MAC address broadcast, which is in hexadecimal and is FF.FF.FF.FF.FF.FF. 8. In a Class C IP address, how long is the network address? 8. C. A default class C subnet mask is 255.255.255.0, which means that the first three octets, or first 24 bits, are the network number. 9. Which of the following is true when describing a unicast address? 9. A. Packets addressed to a unicast address are delivered to a single interface. For load balancing, multiple interfaces can use the same address. 10. A host is rebooted and you view the IP address that it was assigned. The address is 169.123.13.34. Which of the following happened? 10. C. I wonder how many of you picked APIPA address as your answer? An APIPA address is 169.254.x.x. The host address in this question is a public address. Somewhat of a tricky question if you did not read carefully. 11. An IPv4 addresses uses 32 bits. How many bits is an IPv6 address? 11. B. An IPv6 address is 128 bits in size. 12. Which of the following is true when describing a multicast address? 12. B. Packets addressed to a multicast address are delivered to all interfaces identified by the multicast address, the same as in IPv4. A multicast address is also called a one-to-many address. You can tell multicast addresses in IPv6 because they always start with FF. 13. Which of the following is true when describing an anycast address? 13. C. Anycast addresses identify multiple interfaces, which is the same as multicast; however, the big difference is that the anycast packet is delivered to only one address: the first one it finds defined in terms of routing distance. This address can also be called one-to-one-of-many. 14. You want to ping the loopback address of your local host. Which two addresses could you type? 14. A, C. The loopback address with IPv4 is 127.0.0.1. With IPv6, that address is ::1. 15. What two statements about IPv6 addresses are true? 15. B, D. In order to shorten the written length of an IPv6 address, successive fields of zeros may be replaced by double colons. In trying to shorten the address further, leading zeros may also be removed. Just as with IPv4, a single device’s interface can have more than one address; with IPv6 there are more types of addresses and the same rule applies. There can be link-local, global unicast, and multicast addresses all assigned to the same interface. 16. What two statements about IPv4 and IPv6 addresses are true? 16. C, D. IPv4 addresses are 32 bits long and are represented in decimal format. IPv6 addresses are 128 bits long and represented in hexadecimal format. 17. Which of the following is a Class C
network address? 17. D. Only option D is in the Class C range of 192 through 224. It might look wrong because there is a 255 in the address, but this is not wrong—you can have a 255 in a network address. 18. Which of the following are private IP addresses? (Choose two.) 18. C, E. The Class A private address range is 10.0.0.0 through 10.255.255.255. The Class B private address range is 172.16.0.0 through 172.31.255.255, and the Class C private address range is 192.168.0.0 through 192.168.255.255. 19. Which of the following is a valid IP address that can be used on the Internet (meaning the public addressing scheme)? 19. B. The private address range is 10.0.0.0 through 10.255.255.255, 172.16.0.0 through 172.31.255.255, and 192.168.0.0 through 192.168.255.255. Also, 224.0.0.0 through 239.255.255.255 is reserved for multicast addressing. 20. Which of the following is an invalid IP address for a host? 20. C. Option C is a multicast address and cannot be used to address hosts. Which of the following IP addresses is considered private?Address ranges to be use by private networks are: Class A: 10.0. 0.0 to 10.255. 255.255.
Is 192.168 private or public?It's because addresses that start with 192.168 are reserved for private IP addresses. It doesn't matter if the same IP is also assigned on a different private network, because private IP addresses need to be unique only within the local network. Private IP address ranges are as follows: Class A Private IP Range: 10.0.
Which of the following are private IP addresses quizlet?0.0 through 172.31. 255.255 are all considered private, based on RFC 1918.
Is 172.16 a private IP?0.1 is a private IP address, just like those 192.168. x.x or 10.
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