Steps:

  1. Below you will be given some questions, which you should answer in your admin log. You and your lab partner(s) may help one another work out the answers, BUT:
    • This must be mutual. If there is a clear divide, where someone is merely copying answers from another, that is bad.
    • For one, you miss out on a learning opportunity.
    • More importantly, that will qualify as academic dishonesty!
    • Moreover, you should also record your answers, individually.
  2. As your team completes you complete these questions, you may wish to have me check some of your answers before moving along.

  3. Questions:

    1. C1 IP/network address: 192.168.12.19
      Subnet mask: 255.255.255.240

      C1 pings C2, whose IP/network address is: 192.168.12.53

      Are the source and destination IPs within the same subnet? Please explain why or why not.

    2. Destination address: 192.168.12.175
      Subnet mask: 255.255.255.224

      Please calculate the subnet to which the destination network address belongs.

    3. Subnet mask: 255.255.240.0

      For each network address below, please calculate the subnet:

      a)  10. 43. 75. 83: ____.____.____.____
      b)  10. 98.  2.231: ____.____.____.____
      c) 192.168.147. 18: ____.____.____.____

    4. Network Address: 101.0.0.0 (Assume Class A)
      Subnets: 8
      • For each subnet (1st-8th), please indicate:
        • The network address
        • The broadcast address
      • What is the subnet mask?
      • How many hosts per subnet?
    5. Network Address: 165.93.0.0 (Assume Class B)
      Subnets: 4
      • For each subnet (1st-4th), please indicate:
        • The network address
        • The broadcast address
      • What is the subnet mask?
      • How many hosts per subnet?
    6. Choose one class of IP addresses (A, B, or C). For the class you chose, for each value of X, 3 through 6, where X is the number of mask bits...
      • What is the subnet mask?
      • How many subnets are possible?
      • How many hosts per subnet?

      Example:

      Class C, X = 2

      Subnet Mask: 255.255.255.192
      Subnets: 4
      Hosts per Subnet: 62
    7. For each of the following pairs A-L -- where each pair consists of a network address and a CIDR notation -- please indicate the:
      • address class
      • subnet mask
      • number of subnets
      • number of hosts per subnet
      Two other notes:
      • For illustration, pleaseconsult the example given below the table.
      • Some of the IP addresses may not be in Class A, B, or C. If so, you should just
        • Identify which class it is, D or E.
        • For purposes of calculating the number of subnets and hosts per subnet, treat the address as if it were Class C.
        Address    CIDR         Address    CIDR  
      A 141. 71.  0.  0 /21 G 64.  0.  0.  0 /13
      B 152.164.  0.  0 /25 H 167.182.  0.  0 /20
      C 15.  0.  0.  0 /17 I 196.124. 73.  0 /25
      D 236.125.175.  0 /27 J 99.  0.  0.  0 /18
      E 103.  0.  0.  0 /15 K 231.217. 44.  0 /28
      F 254. 79.103.  0 /29 L 183.176.  0.  0 /20

      Example:

      IP: 128.123.0.0
      CIDR: 30
      Class: B
      Subnet Mask: 255.255.255.252
      Subnets: 16384
      Hosts per Subnet: 2
    8. Network Address: 117.189.11.0
      Subnet Mask: 255.224.0.0

      How would you express this information in CIDR notation?

    9. Consider the following block of subnets, expressed in CIDR:
      192.168.206.0/21
      192.168.207.0/21
      192.168.208.0/21
      192.168.209.0/21
      Is this subnet group problematic in any way? Please explain why or why not.

      (For this question, you may find Example 6-10 in the textbook helpful -- along with the text immediately preceding and following the example.)

In your Admin. Log, complete the entry for this lab, which should include the following questions, along with your answers:

  1. How did this lab go, and how long did it take?
  2. Which parts went the most smoothly, and why?
  3. Which parts of the lab were hardest to carry out, and why? How did you deal with it?