SE101 Incomplete Notes

7.quiz4

1 min read

Syntax

  • {-network portion-}
  • {+host portion+}
  • [binary number]

Stuf u mus noe

  • Subnet address = all 0s in host portion
  • Broadcast address = all 1s in host portion
  • How 2 do decimal to binary conversion and vice versa quickly

pArt 1

>Quetion 1

192.168.1.3 → 192.168.1.[0000 0011]

  • if mask is /30 → {-192.168.1.[0000 00-}{+11]+} (Broadcast Address)
  • if mask is /29 → {-192.168.1.[0000 0-}{+011]+} (Host Address/Network Equipment Address)

>Qestion 2

199.100.123.91/30 → {-199.100.123.[0101 10-}{+11]+}

  • All numbers are under 255 so it’s a valid address
  • All numbers all numbers in the host portion are 1s so it is a broadcast address

>Queston 3

299.209.200.9/26

  • First octet is more than 255. Hence it is an invalid address

>Queastiuon 4

20.30.20.30/24 → {-20.30.20-}.{+[0001 1110]+}

  • Not all 1s in the host portion. Not a broadcast address. Invalid!

>Queston 5

245.209.183.191 → 245.209.[1011 0111.1011 1111]

  • {-245.209.183.[10-}{+11 1111]+}
  • 6 bits in host portion
  • /26

>¿qué 6

255.255.128.0 → 255.255.[1000 0000].0

  • {-255.255.[1-}{+000 0000.0000 0000]+}
  • 15 bits in host portion
  • /17

>Qeustion 7

255.255.0.0

>qesustion 8

no math needed.

>Q̶̧͈͇̦̯̊̊̓̈͐u̷͇̓͒̿e̶̢̛̻̝͚̐́͜s̴͒̋͜ẗ̵͔̰̖̩̫́͠i̸̟̙͌o̵̲̰̅̿͛ņ̷̙͍̊ 9

20.40.60.80/16 → 20.40.[0011 1100.0101 0000]

  • First half → {-20.40.[0-}{+000 0000.0000 0000]+}
    • 20.40.0.0/17
  • Second half → {-20.40.[1-}{+000 0000.0000 0000]+}
    • 20.40.128.0/17

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