Hello.
Book 1:
CCNA Routing and Switching Study Guide: Exams 100-101, 200-101, and 200-120
by Todd Lammle
ISBN: 9781118749616
Book 2:
CCENT ICND1 Study Guide, 3rd Edition
by Todd Lammle
ISBN: 9781119288787
Chapter 4 review questions
Question #4
Both books have the same question:
And same multiple choice answers, in the same order.
The network address of 172.16.0.0/19 provides how many subnets and hosts?
Same explanation, but different answers:
ISBN: 9781118749616
F. 8 subnets, 8,190 hosts each
F. A CIDR address of /19 is 255.255.224.0. This is a Class B address, so that is only 3 subnet bits, but it provides 13 host bits, or 8 subnets, each with 8,190 hosts.
ISBN: 9781119288787
C. 7 subnets, 8,190 hosts each
C. A CIDR address of /19 is 255.255.224.0. This is a Class B address, so that is only 3 subnet bits, but it provides 13 host bits, or 8 subnets, each with 8,190 hosts.
The errata page:Wiley: CCENT ICND1 Study Guide: Exam 100-105, 3rd Edition - Todd Lammle
Does not mention this inconsistency.
If the answer is indeed F, please update the errata page to reflect this.
If the answer is C, the new edition fixes this, please update the explanation (the explanation says 8 subnets).
I am currently viewing these books using my safaribooksonline.com account.
It is possible that safaribooksonline.com made the error, if so, please let me know, so I can update them.
Thanks.
Jan 31, 2017 10:56 AM