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Subnetting

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    yengiangyengiang Member Posts: 33 ■■■□□□□□□□
    Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.)

    A. 10.1.168.0
    B. 10.1.176.1
    C. 10.1.174.255
    D. 10.1.160.255
    E. 10.1.160.0
    F. 10.1.175.255

    /20= 240 (11110000)
    increment: 16 - (0,16,32...160,176...)

    It rules out B(??) and E (160.0-network ID). What are the correct 3 out of A,C,D and F? Thanks
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    bbarrickbbarrick Member Posts: 242 ■■■□□□□□□□
    B. is in the 176 subnet.
    E. Is a Subnet ID
    F. Is a Broadcast Address

    Leaving you A, C and D.
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    FrankGuthrieFrankGuthrie Member Posts: 245
    The 10.1.160.0/20 subnet goes from 10.1.160.1 to 10.1.175.254.

    A 20 bit subnet gives you a subnetmask of 255.255.240.0. This means you get blocks of 16 in the 3rd segment:

    10.1.160.0 - 10.1.175.254
    10.1.176.0 - 10.1.191.254
    10.1.192.0 - 10.1.207.254
    10.1.208.0 - 10.1.223.254
    10.1.224.0 - 10.1.239.254
    etc......

    Notice the 3rd subnet increasing with 16. That is the block reserved by using a subnetmask of /20. Remember 20 network bits are used to determine the network and 12 bits are left for the host portion.

    11111111.11111111.11110000.00000000
    255 .255 . 240 .0


    With that in mind, the only answers are A, C and D. Why you only have those left are explained by bbarrick
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    TechGuru80TechGuru80 Member Posts: 1,539 ■■■■■■□□□□
    It's not an increment question.

    What Is Administrative Distance? - Cisco Systems
    Security Certification Roadmap
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    bbarrickbbarrick Member Posts: 242 ■■■□□□□□□□
    None of them give the proper command for a non-default AD as far as I can tell though. The answer he says the book provides doesn't really make much sense.
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    bbarrickbbarrick Member Posts: 242 ■■■□□□□□□□
    TechGuru80 wrote: »
    It's not an increment question.

    What Is Administrative Distance? - Cisco Systems

    Not also, there was another question after the AD question.
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    yengiangyengiang Member Posts: 33 ■■■□□□□□□□
    This forum is awesome. Thanks for helping me with the "subneting part".
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    bbarrickbbarrick Member Posts: 242 ■■■□□□□□□□
    It's against the rules to post actual test questions. Might want to edit that post if you can.
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    TechGuru80TechGuru80 Member Posts: 1,539 ■■■■■■□□□□
    bbarrick wrote: »
    Not also, there was another question after the AD question.

    Noticed that when I hit reply from the first page.
    Security Certification Roadmap
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    yengiangyengiang Member Posts: 33 ■■■□□□□□□□
    bbarrick wrote: »
    Not also, there was another question after the AD question.

    Do you mean I can't post 2 questions?
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    yengiangyengiang Member Posts: 33 ■■■□□□□□□□
    bbarrick wrote: »
    It's against the rules to post actual test questions. Might want to edit that post if you can.

    Please show me the rules link. Thanks.
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    bbarrickbbarrick Member Posts: 242 ■■■□□□□□□□
    yengiang wrote: »
    Please show me the rules link. Thanks.

    If you take a Cisco test you agree to those rules. You could lose your cert over it I believe.

    You can post as many questions as you like in this thread as far as I am concerned. I was just letting the other poster know that another question had been asked.
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    yengiangyengiang Member Posts: 33 ■■■□□□□□□□
    bbarrick wrote: »
    If you take a Cisco test you agree to those rules. You could lose your cert over it I believe.

    You can post as many questions as you like in this thread as far as I am concerned. I was just letting the other poster know that another question had been asked.

    I'm here to learn and share...I probably have to take more test just to get familiar with those "rules". It's been 13 years since I took my last cert...:)
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    bbarrickbbarrick Member Posts: 242 ■■■□□□□□□□
    yengiang wrote: »
    I'm here to learn and share...I probably have to take more test just to get familiar with those "rules". It's been 13 years since I took my last cert...:)

    That's probably the most important thing you should remember with Cisco, probably other cert tests as well. There are sites called brain **** that have actual test questions. Utilization of these sites can cost you your cert, posting actual cert questions can as well. Hang around here for awhile and you will see it ad nauseam. :)
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    yengiangyengiang Member Posts: 33 ■■■□□□□□□□
    bbarrick wrote: »
    That's probably the most important thing you should remember with Cisco, probably other cert tests as well. There are sites called brain **** that have actual test questions. Utilization of these sites can cost you your cert, posting actual cert questions can as well. Hang around here for awhile and you will see it ad nauseam. :)


    Well...that's inevitable. I'm not really concerned. My main goal is learning subneting, therefore, I'll keep posting question about subneting regardless.
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