Networking Midterm Exam

  1. You just bought the public IP:  110.0.0.0 from IANA.  If you plan to have at least 20,000 subnetworks, compute for the following:
    • ( 2 pts.) What is the class of this IP.
    • ( 2 pts.) How many bits should we borrow from the host octets of this IP to accomodate at least 20,000 subnets (The number of bits should just be enough: not too little, not too much).
    • ( 2 pts.) If your answer above results in more than 20,000 subnets and you plan to use all of the 20,000 subnets to your various company branches worldwide, how many unused subnet addresses do you still have for future use. (Hint:  Do not include the broadcast address of your company as a single entity.)
    • (3 pts.) What is the broadcast address of your company as a single entity on the Internet?
    • (3 pts.) What is the last possible host IP address that can be given to any client PC on our 5th subnet?
    • (3 pts.) What is the broadcast address of our 5th subnet? (Hint: It is not the same as the broadcast address mentioned in the second question.)
    • (3 pts.) What is the first possible host IP address that can be given to any client PC on our 9th subnet?
    • (15 pts.) What are the last 5 possible host IP addresses that can be given to any client PC on our 9th subnet?
    • ( 3 pts.) What is the maximum number of possible host IP addresses can each subnet have? (Hint: It should not include subnet address itself and its subnet mask)
    • (15 pts.) What are the last 5 possible host IP addresses that can be given to any client PC on our 4th subnet?
    • (15 pts.) What are the first 5 possible host IP addresses that can be given to any client PC on our 11th subnet?
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