Combined Errata
Page 0CD
Chapter 2 Question 9 The book and CD says the answer is C, it should read B - HTTPS. The explanation is correct.
Page 41
Paragraph 5 Last sentence -The sentence reads, "It the packet is destined for a remote host, IP will look for the IP address of the default gateway (router) instead". The "It" in the beginning of the sentence should be an "If".
Page 51
Question 9 - Option F needs to be removed from the question.
Page 102
Chapter 2 Question 9 The book and CD says the answer is C, it should read B - HTTPS. The explanation is correct.
Page 129
Practice Example #2A Last column of table, all IPs should be 10.255.x.x not 10.0.x.x
Response...
Yes, this is correct.
After the ... in this practice example #2A on page 129, here is what it
should be
10.255.240.0
10.255.240.1
10.255.255.254
10.255.255.255 Page 132
Figure 3.2 it says "The mask 255.255.255.240 (/28) provides 14 subnets, ..." should be "The mask 255.255.255.240 (/28) provides 16 subnets, ..."
Page 135,137,139
On pages 135 and 137, the tables at the top of the page (From left to right: Subnet, Mask, Subnets, Hosts, Block) are incorrect in the Subnets column. It seems as though each number is listed as two less than it should be. For example: A subnet with mask 192 is listed as having only 2 available subnets, even though the block size is 64. As the author stated on page 136, "With a block size of 64, you can only have four networks, and so on, ..."
Response..
Yes, those tables were not updated in accordance with the ip subnet-zero
rule, so the 192 mask would provide four subnets, etc.
Number of subnets needs to be +2
Right now, they are 2, 6, 14, 30, 62…..please change to 4, 8, 16, 32 and 64.
Page 140
Exam 640-801:
On page 140, the first sentence below Figure 3.9 should be changed from "From the list of IP addresses on the left of the figure,..." to "From the list of IP addresses on the right of the figure,..."
Page 146
Towards the bottom of the page: Existing: Host B IP address 192.168.10.34-62 should be Host B IP address 192.168.10.34-46
Page 155, Chapter 3 - Question 11
Here is the correct question text:
Which of the following IP addresses fall into the CIDR block of
110.68.4.0/22? (Choose three.)
A. 110.68.8.32
B. 110.68.7.64
C. 110.68.6.255
D. 110.68.3.254
E. 110.68.5.128
F. 110.68.12.128
Answer: B, C, E.
New explanation:
A Class A network address with a /22 is 255.255.252.0. The subnets
in the third octet are 0, 4, 8, 12, etc. The network address in the
question is 110.68.4.0, with a broadcast of 110.68.7.255, since the
next subnet is 110.68.8.0. Answers B, C, and E are correct host IDs.
Page 187
The second command (line) from the bottom of the page should read “Router(config-line)#exit” instead of just Router(config)#exit
Page 235
Fourth line down should be 192.168, not 172.16
Page 236
End of first paragraph should be 192.168, not 172.16
Page 271
Line 3-4 Should read “debug ip rip” not “debug ip route”
Page 282
Question #7, answer A. should read:
"RouterC will use an ICMP to inform HostA that HostC cannot be reached"
Page 326
4 lines from bottom. IP addresses should be 192.168.10.64 through 192.168.10.95
Page 517
Answer numbering is incorrect
Page 570
Q12. The command variables 180 and 40% have been transposed.
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