# CCNA Identifying Classes & Types of IPv4 Addresses Quizz **URL:** \ **Category:** Networking\ **Tags:** networking\ **Created:** [December 3, 2021, 1:14pm UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401 "2021-12-03T13:14:01Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![cuongnguyen2911-8225](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@cuongnguyen2911-8225](https://legacy-community.ine.com/u/cuongnguyen2911-8225)\ **Post date:** [December 3, 2021, 1:14pm UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401/1 "2021-12-03T13:14:01Z")
Hi everyone, hope ur all doing well! I came across a quizz as below: Which of the following IPv4 addresses could potentially be assigned to a laptop’s NIC card? (Select two answers) 1. 169.254.200.1 2. 126.99.99.255 3. 127.45.22.1 4. 169.200.1.1 The answers are: 2 and 4, I guess they makes sense because 2 and 4 are belonged to class-A and class-B respectively, while 3 is the loopback address. May I ask why the answer 1 (169.254.200.1) is not the case? I believe 1 is actually also belonged to the class-B address range, from 128.x.x.x.x to 191.x.x.x.x. Thanks a lot everyone!. ---
**Author:** ![kbogart-81b6c89deee9](https://avatars.discourse-cdn.com/v4/letter/k/4af34b/32.png) [@kbogart-81b6c89deee9](https://legacy-community.ine.com/u/kbogart-81b6c89deee9)\ **Post date:** [December 3, 2021, 5:33pm UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401/2 "2021-12-03T17:33:17Z")
Any address starting with 169.254.x.x is technically called an APIPA address (Automatic Private IP Address). The local TCP/IP stack within a device will give itself this address if DHCP fails (no DHCP Offer is received) and it technically is only meant to allow sending/receiving of packets on the local link (should not be routed). That’s why 169.254.200.1 is an incorrect answer. Because one would never intentionally configure this address (manually) on a NIC card…and a DHCP server will never offer this address via the DHCP process. Hope that helped! Keith ---
**Author:** ![jaa](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jaa](https://legacy-community.ine.com/u/jaa)\ **Post date:** [December 3, 2021, 6:20pm UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401/3 "2021-12-03T18:20:50Z")
Regardless the IP class, there are a few IP blocks that are reserved for special purposes. APIPA, Loopback etc are examples for that. If the system is not able to fetch an IP from the DHCP server, then the NIC gets assigned with an APIPA IP ( range 169.254.0.0/16). > **[Reserved IP addresses](https://en.wikipedia.org/wiki/Reserved_IP_addresses)** > > In the Internet addressing architecture, the Internet Engineering Task Force (IETF) and the Internet Assigned Numbers Authority (IANA) have reserved various Internet Protocol (IP) addresses for special purposes. > IPv4 designates special usage or applications for various addresses or address blocks: > IPv6 assigns special uses or applications for various IP addresses: ---
**Author:** ![cuongnguyen2911-8225](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@cuongnguyen2911-8225](https://legacy-community.ine.com/u/cuongnguyen2911-8225)\ **Post date:** [December 3, 2021, 10:16pm UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401/4 "2021-12-03T22:16:50Z")
Thanks Keith, I must have missed something in your lecture, I’m pretty sure that I took note of all important points haha :’)…, but I got it now, I’ll be more careful with the reserved IP addresses, really appreciate your time. ---
**Author:** ![cuongnguyen2911-8225](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@cuongnguyen2911-8225](https://legacy-community.ine.com/u/cuongnguyen2911-8225)\ **Post date:** [December 3, 2021, 10:25pm UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401/5 "2021-12-03T22:25:36Z")
Hi Jaa, I really forgot the reserved IP addresses …, :’), thanks a lot for reminding me! Hope to see your support with my noob’s questions in the future, thanks for your time. ---
**Author:** ![jaa](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jaa](https://legacy-community.ine.com/u/jaa)\ **Post date:** [December 4, 2021, 1:45am UTC](https://legacy-community.ine.com/t/ccna-identifying-classes-types-of-ipv4-addresses-quizz/1401/6 "2021-12-04T01:45:42Z")
always 🙌@cuongnguyen2911-8225