Chapter 10 Network Segmentation and Virtualization (You can use the method 2. Ex

Question

Chapter 10 Network Segmentation and Virtualization (You can use the method 2. Explore at least three different methods of calculating subnets. time to make presented in this book Take the and it. method, and why it works. List the Web links for each method you evaluated, from a few general notes about how each method is performed and what you learned 3. Select one of the methods that makes the most sense to you, and list the steps in detail. Imagine that you're tutoring another student in how to calculate subnets, and be sure to include enough detail that the steps would make sense to someone who doesn't already know how to calculate subnets. 4. If the method relies on any mnemonics, lists, or formulas, draw those on an Set card somewhere that you will notice it on a daily basis, and each day for at least a week take time to review this mental starting for subnet calculations. Redraw this information at least three times during the week.

Explanation / Answer

Answer :

I would be outlining two methods that more understandable and easy for subnet calculation.

suppose we have been give the IP address and mask

that 172.16.5.4/21
mask would be 255.255.248.0 , here 21 represents 21 1's bit these are network bits.

and we have to calculate the network address and broadcast address .

method 1:

relatively complex:

172.16.5.4 in binary    10101100 00010000 00000101 00000100
255.255.248.0 in binary 11111111 11111111 11111000 00000000

now the network address is the logical AND of the respective bits in the binary
representation of the IP address and network mask. we first calculate in binary then convert them in decimal.

172.16.5.4 in binary    10101100 00010000 00000101 00000100
255.255.248.0 in binary 11111111 11111111 11111000 00000000
-------------------------------------------------------------
   AND operation         10101100 00010000 00000000 00000000
then convert into binary would be 172.16.0.0 (Network address)

Now we have to calculate the broadcast address:
The broadcast address converts all host bits to 1's.
here host bits are last 11 bits (32-21).therfore 10101100 00010000 00000111 11111111 that is 172.16.7.255 in decimal.

Method 2 :

Easy method :
we start with subnet mask :
255.255.248.0
if we see the third octet because in forth we have all host bits.
if we subtract from 256 that is 255-248=7 , it says that we have network of block of 8 i.e 0-7, 8-15
16-23,24-31 and so on...

we have to be little bit logical here. since the IP address is 172.16.5.4
if you could see 5 , it falls in the range 0-7.
therfore the network address would be 172.16.0.0 and the last address that is broadcast address would be
172.16.7(0-7).255 (all bit are 1's in case broadcast adress.)

conclusion :

in method 2 , if you practice you can be master and don't require paper pencil to calculate the subnets

I as network proffesional use Method 2 .

Hope , it will help you.

Thanks

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.