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 CCNA interview questions  CCNA Interview Questions
 CCDA interview questions  CCDA Interview Questions
Question
You are a network administrator and have been assigned the

IP address of 201.222.5.0. You need to have 20 subnets with

5 hosts per subnet. What subnet mask will you use?

A. 255.255.255.248

B. 255.255.255.128

C. 255.255.255.192

D. 255.255.255.240
 Question Submitted By :: Guest
I also faced this Question!!     Rank Answer Posted By  
 
  Re: You are a network administrator and have been assigned the IP address of 201.222.5.0. You need to have 20 subnets with 5 hosts per subnet. What subnet mask will you use? A. 255.255.255.248 B. 255.255.255.128 C. 255.255.255.192 D. 255.255.255.240
Answer
# 1
Answer: A

By borrowing 5 bits from the last octet, you can.

have 30 subnets. If you borrowed only 4 bits you could only

have 14 subnets. The formula is (2 to the power of n)-2.

By borrowing 4 bits, you have (2x2x2x2)-2=14. By borrowing

5 bits, you have (2x2x2x2x2)-2=30. To get 20 subnets, you

would need to borrow 5 bits so the subnet mask would be

255.255.255.248.
 
Is This Answer Correct ?    1 Yes 0 No
Guest
 
  Re: You are a network administrator and have been assigned the IP address of 201.222.5.0. You need to have 20 subnets with 5 hosts per subnet. What subnet mask will you use? A. 255.255.255.248 B. 255.255.255.128 C. 255.255.255.192 D. 255.255.255.240
Answer
# 2
Ans : A


IP address 201.222.5.0 - Class C
Default SNM - 255.255.255.0

host - 5

  255   .   255  .  255   . 248 
11111111.11111111.11111111.11111|000

Total host - 8
Usable host - 6
Total subnet - 32
Usable subnet - 30
 
Is This Answer Correct ?    1 Yes 0 No
M Haja Bahurudeen
 
 
 

 
 
 
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