subnetting is simple
Summary
TLDRThe video script by Sunny introduces the concept of subnetting, a method to divide an IP network into smaller segments to enhance performance and security. Sunny simplifies the process with a 'Sunny Subnetting Table' to determine subnets, host ID ranges, and broadcast IDs. Using a practical example, Sunny demonstrates how to create three subnets from a given network ID, explaining each step clearly to make subnetting accessible and straightforward.
Takeaways
- 😀 Subnetting is the process of dividing a network into smaller networks to improve performance and security.
- 📚 Basic knowledge of subnet masks, network ID, host ID, and broadcast ID is essential for understanding subnetting.
- 🔑 The 'Sunny Subnetting Table' is a simple and powerful tool for solving subnetting problems, with rows for subnets, hosts, and subnet masks.
- 🔢 The first row of the Sunny Table lists numbers doubling from 1 to 256, representing the number of subnets possible.
- 🔠 The second row lists the total host IDs for each subnet, halving from 256 down to 1, which is the reverse of the first row.
- 🛡️ The third row of the Sunny Table shows the shorthand format of subnet masks, starting from /24 and increasing to /32.
- 🏢 In the given example, the task is to create three subnets for different areas of a coffee shop using a /24 subnet mask.
- 🔎 To find the suitable subnets, look at the Sunny Table and choose a column that allows for the desired number of subnets.
- 📈 The chosen subnets will have a /26 subnet mask, indicating four subnets with 64 host IDs each, minus two for network and broadcast IDs.
- 📝 Each subnet's information includes the network ID, subnet mask, usable host IDs (64-2=62), and broadcast ID, which is the last ID in each range.
- 📉 Subnetting has a downside of wasting one subnet, as in the example where only three out of four possible subnets are used.
Q & A
What is subnetting?
-Subnetting is the process of dividing a network into two or more smaller networks, known as subnets. It is a logical subdivision of an IP network.
What are the main purposes of subnetting?
-The main purposes of subnetting are to relieve network congestion and improve network performance and security.
What is a subnet mask and why is it used?
-A subnet mask is used to separate the network ID from the host ID in an IP address. It is used to determine the size of the subnets and the number of usable host addresses within each subnet.
What are the basic knowledge requirements for understanding subnetting?
-Basic knowledge requirements for understanding subnetting include understanding of IP addresses, network ID, host ID, and broadcast ID.
What is the Sunny Subnetting Table mentioned in the script?
-The Sunny Subnetting Table is a simple and powerful tool created by Sunny to help with subnetting calculations. It includes rows for subnet numbers, host numbers, and subnet masks in shorthand format.
How does the Sunny Subnetting Table help in solving subnetting problems?
-The Sunny Subnetting Table provides a systematic way to determine the number of subnets, the number of hosts per subnet, and the new subnet masks when dividing a network.
What is the pattern for the first row of the Sunny Subnetting Table?
-The pattern for the first row of the Sunny Subnetting Table starts with 1 and doubles each subsequent number, such as 1, 2, 4, 8, 16, 32, 64, 128, and 256.
What is the pattern for the second row of the Sunny Subnetting Table?
-The second row of the Sunny Subnetting Table starts with 256 and halves each subsequent number, which is the reverse order of the first row.
What is the shorthand format used for the third row of the Sunny Subnetting Table?
-The shorthand format used for the third row of the Sunny Subnetting Table is the subnet mask notation, starting with /24 and increasing by 1 for each subsequent entry up to /32.
How many usable host IDs are there in each subnet when using a /26 subnet mask?
-When using a /26 subnet mask, there are 64 total host IDs for each subnet. However, the first and last IDs are reserved for the network and broadcast addresses, respectively, leaving 62 usable host IDs.
How can you find the broadcast ID for each subnet?
-The broadcast ID for each subnet is the last host ID in the subnet range. It can be found by adding 1 to the network ID of the next subnet or by adding the subnet size (64 in the case of /26) to the previous broadcast ID.
What is the host ID range for each subnet?
-The host ID range for each subnet is the range of usable host IDs between the network ID and the broadcast ID, excluding the network and broadcast IDs themselves.
What is the downside of subnetting mentioned in the script?
-The downside of subnetting mentioned in the script is the potential waste of one subnet when dividing a network into a specific number of subnets that does not perfectly match the available subnets from the subnetting process.
Outlines
😀 Introduction to Subnetting
The script begins with an introduction to subnetting, explaining it as a logical division of an IP network. The process involves dividing a network into two or more networks to alleviate congestion and enhance security. The video aims to simplify the complex concept of subnetting using the 'Sunny Way'. Basic knowledge such as subnet masks, network ID, host ID, and broadcast ID is assumed. Links to additional resources are provided for viewers who need them. The video is longer than usual, and the presenter, Sunny, uses an example of creating subnets for a coffee shop to illustrate the process.
📚 Sunny Subnetting Table and Subnet Calculation
This paragraph introduces the 'Sunny Subnetting Table', a tool to simplify subnetting calculations. The table consists of rows representing subnet numbers, host numbers, and subnet masks. The presenter uses the table to demonstrate how to find suitable subnets for the coffee shop example, choosing a /26 subnet mask that allows for four subnets, each with 64 total host IDs. The script explains how to calculate the network ID, subnet mask, usable host IDs, and broadcast IDs for each subnet, emphasizing the process of incrementing by 64 to find subsequent network IDs and subtracting 2 from the total host IDs to find usable host IDs.
🔢 Listing Subnet Details and Address Ranges
The final paragraph focuses on listing the details for each of the four subnets derived from the Sunny Subnetting Table, including the network ID, subnet mask, usable host IDs, and broadcast IDs. It also explains how to determine the host ID range for each subnet, which lies between the network ID and the broadcast ID. The script provides a method to calculate the broadcast ID by subtracting 1 from the next network ID and emphasizes the simplicity of the Sunny method for solving subnetting problems. The presenter concludes by acknowledging the viewer's patience and invites questions, promising a follow-up video on further subnetting topics.
Mindmap
Keywords
💡Subnetting
💡IP Network
💡Network Congestion
💡Network Performance
💡Security
💡Subnet Mask
💡Host ID
💡Broadcast ID
💡Sunny Subnetting Table
💡Network ID
💡Usable Host IDs
Highlights
Introduction to the concept of subnetting as a logical subdivision of an IP network.
The primary purpose of subnetting is to alleviate network congestion and enhance performance and security.
Subnetting is a topic that may appear in network certification exams like CompTIA Network+.
Simplification of the complex process of subnetting through the 'Sunny Way' of subnetting.
Basic knowledge required for subnetting includes understanding subnet masks, network ID, host ID, and broadcast ID.
The importance of building a table for solving subnetting questions, referred to as the 'Sunny Subnetting Table'.
The Sunny Subnetting Table consists of rows for subnet numbers, host numbers, and subnet masks.
Pattern explanation of the Sunny Subnetting Table, where each row follows a specific doubling or halving sequence.
A practical example of subnetting a network for a coffee shop with specific requirements.
How to determine the number of subnets and the corresponding subnet mask using the Sunny Table.
Process of listing subnet information including network ID, subnet mask, host ID range, and broadcast ID.
Explanation of how to calculate the first network ID and subsequent IDs by adding the subnet size.
Clarification on the number of usable host IDs, considering the network and broadcast IDs.
Method to determine broadcast IDs for each subnet by using the next subnet's network ID minus one.
How to find the host ID range for each subnet, which lies between the network and broadcast IDs.
The downside of subnetting, which includes the potential waste of one subnet.
Invitation for viewers to practice subnetting with a similar question provided for additional learning.
Promise of a follow-up video to further explore subnetting a subnet using the Sunny Table.
Acknowledgment of the viewers' patience and an invitation for questions and comments for further assistance.
Transcripts
hello and this is sunny welcome back
today my topic is subnetting a subnet is
a logical subdivision of IP network the
process of dividing a network into two
or more networks is called subnetting
the main purpose of subnetting is to
help relieve a network congestion and
improve network performance security is
another benefit of a subnet iam besides
your network a professor may test you
about subnetting Kampuchea national
network plaza certification also expects
you to know how to subnet however some
textbooks make subnetting is very
complicated and confusing in this video
I will use a very simple way
sunny way of subnetting and after this
video you will find subnetting is not a
difficult at all however in order to
understand subnetting we do need some
basic knowledge such as sadness mosque
network ID host ID and a broadcast ID i
put several videos links below just in
case you needed them one more point this
video is much longer than most of my
other videos so please bear with me
[Music]
let's take a look at my example one day
your supervisor walks to you seeing
here's a network ID place it create
three separate networks or subnets for
coffee shop sunny cafe why is for the
office why is for the front desk and
storage room and one is for the public
use your task is to list each service
network ID subnet mask host ideal range
the number of will useful host IDs and
broadcast ID I put this example below
this video so you can copy to your
document for your reference as we
discuss the process of subnetting first
is first let's build a table this table
is the most critical because once we
build it we can easily solve most
subnetting questions and this table has
a three rows the first row is a subnet
with nine numbers we start with 1 then 2
4 8 16 32 64 128 and 256 the pattern is
each number is a double of is previous
number okay
the second row is a host this row tells
the number were total host IDs for each
new subnet start with 256 then 128 64 32
16 8 4 2 and
one the pattern is each number is half
of his previous number or the second row
is the reverse order of the first row
you see everyone can handle this right
the third row is a subnet mask we use
shorthand format starting with 24 25 26
27 28 29 30 31 32 well we are done I
call this table sunny subnetting table
or simply sunny table because is a
simple sunny but a powerful table for
subnetting and a subnetting subnet now
we use a sonnet able to solve the
subnetting example mission about let's
go back to the question you are giving a
network ID 100 mm 168 4.0 / 24/24 somnus
mosque you are required to get three
subnets three is the key keyword now
look at the sunny table and it try to
find the three subnets in the first or
in the top row of course there is no
exactly 3 semanas
but for subnets are suitable because we
can get 4 subnets and choose any three
subnets for sunny cafe so we choose a
full subnets for let me circle the whole
column ignoring all other columns
because we only use this three numbers
and we can get all our answers just from
this column or these three numbers for
eighty-four and a slash 26:4 means four
subnets sixty-four means each subnet
each new subnet we are how was 64 total
host ideas including network ID and a
broadcast ID / 26 is the new subnet mask
for all these four subnets
[Music]
well let's list all these four subnets
information a network ID subnet mask
host ID wrench the number we'll use for
host IDs and broadcast ID let's find the
first network ID the first network ID is
always the original network ID which is
1 and E 2 tau 168 are 4.0 that's easy
right
I use read found to emphasize the last
number because the first three numbers
stay the same across the table so place
just a focus on last number in red we
will get next network ID by simply
adding 64 to is previous network ID
therefore the second network ID is 0
plus 64 which is a 64 the third network
ID would be 64 + 64 which is 128 the
fourth network ID is 128 plus 64 which
is 192
now subnet mask for each subnet well
they are all / 26
the original subnet mask is slash 24 we
are done with a sub s mask column
now let's list the number of a usable
host IDs and we can also find an answer
from the sunny table which is 64 64 is
the total number of a host IDs for each
Network or each subnet but the first
host ID is reserved for network ID and
alas the host ID is reserved for
broadcast ID thus the number of useable
host ID is 64 minus 2 which is a 62 thus
we write down 62 for all 4 subnets we
are done with the fourth column now
let's look at at the broadcast ID for
each subnet keep in mind the last host
ID is reserved for his broadcast ID
therefore broadcast ID for the first
subnet is 63 and we can tell with the
reference to the next network ID 64 next
broadcast ID is 127
next one is 191
and that the last broadcast ID is 255 we
can say the broadcast ID equals next
subnet networks ID minus 1 we can also
do like this once you know the first
broadcast the ID 63 and then you can
simply add 64 to get the second
broadcast ID and the 63 plus 64 is 1 2
new semi and if they add 64 2 1 2 new
semi which we get the third brother Casa
ID 1 91 and then they increase by 64
again to get the fourth broadcast the ID
which is 255 we are almost done
one last column the host ID arrange a
subnet host ID range is is any IDs
between his network ID and a broadcast
ID for the first subnet 1 262 is between
network ID 0 and broadcast ID 63 the
second host an ideal range 65 to 126 is
between 64 and 127th the third host ID
range 129 to 190 is between 128 and 191
the fourth host ID range is between 192
and a 255 which is 193 to 254 so to keep
simple we only talked about it last a
number and because the first of three
numbers stay the same
that's all we get all answers you can
assign any 3 out of 4 subnets for sunny
cafe 1 subnet
is wasted of course that's the downsides
of subnetting no biggie I want to thank
you for following me at this point you
are a very patient person for listening
to me with my strong English accent even
though the process sounds a tedious but
once you get to know how to do it you
can solve any similar questions in no
time I put a 1 similar question below
for your practice I also provided the
answer below for your reference if you
have a questions please feel free to
leave your comments or ask me questions
I would be happy to help you in next
video I will go one step further
subnetting a subnet using the same sunny
table in same sunny way please stay
tuned thank you very much and see you
next time
[Music]
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