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subnet mask

Discussion in 'MCDST' started by karan1337, Dec 25, 2010.

  1. karan1337

    karan1337 Byte Poster

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    Two computers whose IP addresses are 65.7.128.199 and 65.7.132.203 are on the same subnet. What is the most restrictive subnet mask for this subnet?
     
    Certifications: MCP, MCDST, MCTS, Brainbench: XP and Vista [Master]
    WIP: Bachelors:Computer Science
  2. coolc

    coolc Nibble Poster

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    a class A subnet mask.

    255.0.0.0
     
  3. karan1337

    karan1337 Byte Poster

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    But in the subnet, the first two octets are same, (65.7), will a class A mask be the most restrictive?

    (Ans given is: 255.255.248.0)
     
    Certifications: MCP, MCDST, MCTS, Brainbench: XP and Vista [Master]
    WIP: Bachelors:Computer Science
  4. danielno8

    danielno8 Gigabyte Poster

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    You answer is the most restrictive.
     
    Certifications: CCENT, CCNA
    WIP: CCNP
  5. soundian

    soundian Gigabyte Poster

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    looking at the third octet:
    10000000-128
    10000100-132
    You can see that the first 5 digits are the same for both, therefore a subnet mask of 11111000=248 applied to the 3rd octet is the most restrictive while keeping them both in the same subnet.
     
    Certifications: A+, N+,MCDST,MCTS(680), MCP(270, 271, 272), ITILv3F, CCENT
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  6. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    Needs to be restrictive mate. Class A isnt. :biggrin
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
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  7. karan1337

    karan1337 Byte Poster

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    thanks soundian.
     
    Certifications: MCP, MCDST, MCTS, Brainbench: XP and Vista [Master]
    WIP: Bachelors:Computer Science
  8. DC Pr0Mo

    DC Pr0Mo Kilobyte Poster

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    ignore
     
    Last edited: Dec 25, 2010
    Certifications: MCDST | BSc Network Computing
    WIP: 70-291 | 70-293 | 70-294 | 70-297

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