Appendix A
Answers to the “Do I Know This Already?” Quiz Questions and Q&A Questions
“Do I Know This Already?” Answers
Chapter 1
1. B. Private IPv4 address blocks are 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255.255, and 192.168.0.0 to 192.168.255.255.0.
2. B. There are 5 host bits: 25 − 2 = 30 hosts.
3. D. Loopback addresses should have a /32 mask so that address space is not wasted.
4. C. The precedence bits are located in the Type of Service field of the IPv4 header.
5. B. Multicast addresses range from 224.0.0.1 to 239.255.255.255.
6. D. The summary route summarizes subnetworks from 150.10.192.0/24 to 150.10.199.0/24. Answer D is the only one that includes them.
7. D. Point-to-point links need only two host addresses. They ...
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