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| borsky 2003-02-13, 11:45 am |
| Hi
Here are some of the answers/explanation I read in Transcender and think they are not correct. What do you think?
1. "...DNS servers cannot resolve single-part names to IP addresses"
(single-part: I have never seen this expression before it might refer to single label, unqualified names.)
2."...You should not create the same Active-Directory integrated zone on domain controllers for different domains because those zones would not be automatically syncronized"
(Two domains: A and B. Dns zones are active-dir-integrated in both domains. Dns in A can resolve names in both domains, but Dns in B can only resolve names in B. You want users in B to be able to resolve names in both domains.
Transcender's answer:In B inplement a secondary zone for A)
Source: Trancender 70-218 question A52 and B23
I also found two incorrect answers about subnetting one of wich has been corrected. The other one is this:
Question A24: you plan to set up 4 subnets with up to 20 host on each. You'll use 192.168.0.0/24 private addr. Which subnet mask should you assign?
a. 255.255.255.192
b. 255.255.255.224
What is your suggestion? | |
| Clangashe 2003-02-24, 6:30 pm |
| Question A24: you plan to set up 4 subnets with up to 20 host on each. You'll use 192.168.0.0/24 private addr. Which subnet mask should you assign?
a. 255.255.255.192
b. 255.255.255.224
Quick explaination
there are 3 bits used for subnetting
2 to the power of 3 = 8 max subnets.
2 subnets are not usable (network and broadcast address)
8-2=6 useable subnets
Subnet mask
128+64+32= 224
Total number of clients.
total of 8 bits minus bits used for subnet
8-3= 5 bits for clients.
2 to the power of 5 = 32
max number of host per subnet is 32.
Answer is B
A is not correct because 2 bits are used for the subnet.
2 to the power of 2 = 4 max subnet
remember 2 subnets can not be used (network and broadcast)
4-2 = 2 subnets. we need 4 subnets. | |
| borsky 2003-02-25, 2:59 am |
| That is the traditional way of calculating subnets. With the latest protocols though that MS use (OSPF and RIP) the all 1's and all 0's subnet is allowed.
By the way I wrote to trancender and they will correct the answer saying both can be correct. | |
| Clangashe 2003-02-25, 6:21 am |
| For that q, classfull was the simplest and quickest way to do it. |
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