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Practice test question
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| I tried the practice exam - really wonderful service
On the question below, I was surprised to see the correct answer as 'D'. Isn't the Class wrong for the IP address? Should be class B shouldn't it? Isn't that problem #1 in the situation?! I suppose I got this question wrong because it wasn't one of the choices in the answer?!
I will be attempting the i-net+ soon and I sure have to figure out some more logic
**Practice Exam Question #8**
8.Your ISP has assigned you the IP address 190.28.2.100 and a subnet mask 255.255.255.0 He also assigned you the gateway’s IP address. You assigned this IP address, subnet mask and a gateway to your computer and you still cannot access the Internet. What is the most likely cause of the problem?
C is not correct answer
ISP assigned you incorrect subnet mask
correct answer is: D
ISP forgot to make a change on his router | |
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| Hello Elsie,
Even though the default subnet mask of a class C address is 255.255.255.0, this is only the DEFAULT subnet mask. You can create a custom subnet mask so that 255.255.0.0 applies to a class C address, which gives you more addresses.
Go to http://www.learntosubnet.com/ and go through the tutorials. An excellent resource. | |
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| thank you
hopefully the i-net+ doesn't
require that higher level of
knowledge. (might have
to shoot myself then!)
thanks again | |
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| Your welcome. To be honest, I don't know how deep they'll test your knowledge of subnet masks because I haven't taken the test yet.
However, my guess is that you'll be okay as long as you recognize the difference between a custom subnet mask and the default subnet mask.
(But please recognize that's just my opinion.)
Good luck! | |
| SasiSan 2001-04-13, 8:14 pm |
| quote:
Originally posted by DTB
Even though the default subnet mask of a class C address is 255.255.255.0, this is only the DEFAULT subnet mask. You can create a custom subnet mask so that 255.255.0.0 applies to a class C address, which gives you more addresses.
Just wanted to add my two cents... I read this and got confused myself because 190 is a class B. So the 'default' subnet is 255.255.0.0. If they company wants to create subnets they can borrow bits from the last two octets. I understand that part.
What I don't get is why you would need to reconfigure the router for your own internal network. Wouldn't you already have all your IP internally routed? | |
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| quote:
Originally posted by SasiSan
Just wanted to add my two cents... I read this and got confused myself because 190 is a class B. So the 'default' subnet is 255.255.0.0. If they company wants to create subnets they can borrow bits from the last two octets. I understand that part.
 Right. Sorry if I confused anyone. I should have said class B.
If I've read the question right, the "change the router" bit refers to the ISP making a change on their router. | |
| SasiSan 2001-04-13, 9:11 pm |
| But if they are assigning the IP Address... Wouldn't their router already be configured to forward the IP?
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