IP address network and host portion | subnet mask explained | ccna 200-301 free |
Summary
TLDRIn today's CCNA session, the focus was on IPv4 addresses, highlighting the division into network and host portions. The importance of a unique network number and IP address for each machine was emphasized. The role of subnet masks in determining these portions was explained, using an example with a /24 subnet mask to illustrate how network and host addresses are derived.
Takeaways
- π The session is part of the CCNA series and focuses on IPv4 addressing, network and host portions, and subnet masks.
- π’ Each network in TCP must have a unique network number, and every machine must have a unique IP address.
- π IP addresses are divided into two parts: the network part and the host part, with the network part identifying the class of the network.
- π₯ The network part of an IP address is the same for each host on the network, but the host part must be different for each host.
- π€ The role of the subnet mask is to determine which portion of the 32-bit IP address is the network part and which is the host part.
- π The subnet mask is a 32-bit number, represented in dotted decimal format, and it helps computers identify the network and host portions of an IP address.
- π The ones in the subnet mask represent the network portion, and the zeros represent the host portion.
- π‘ The subnet mask does not contain the network or host portion itself but indicates where to find these portions in an IP address.
- π An example is given to illustrate how to determine the network and host addresses using a subnet mask of 255.255.255.0 (slash 24).
- π The network address in the example is 192.168.123.0, and the host address is 132, demonstrating the application of the subnet mask.
- π The next session will discuss IPv4 address classes, indicating a continuation of the series.
Q & A
What is the main topic discussed in the CCNA series session?
-The main topic discussed in the session is IPv4 addressing, including the network and host portions, as well as the role of subnet masks.
Why is a unique network number important for each network running TCP?
-A unique network number is important because it identifies the network and ensures that each network running TCP/IP can be distinguished from others.
How are the bytes of an IP address divided?
-The bytes of an IP address are divided into two parts: the network part, which specifies the unique number assigned to the network, and the host part, which uniquely identifies each machine on the network.
What is the purpose of the network part of an IP address?
-The network part of an IP address specifies the unique number assigned to the network and identifies the class of the network.
What does the host part of an IP address represent?
-The host part of an IP address represents the portion that uniquely identifies each machine on the network.
How does a subnet mask help in determining the network and host portions of an IP address?
-A subnet mask helps by indicating which bits of the IP address are used for the network and which for the host. The ones in the subnet mask represent the network portion, and the zeros represent the host portion.
What is the significance of the subnet mask in a TCP/IP network?
-The subnet mask is significant because it tells computers which parts of the IP address to look for as the network and host addresses, allowing for proper routing and addressing within the network.
What is the subnet mask for a /24 network in dotted decimal format?
-The subnet mask for a /24 network is 255.255.255.0 in dotted decimal format.
How can you determine the network address and host address from an IP address and its subnet mask?
-By aligning the IP address and the subnet mask and comparing them bit by bit, the network address is identified by the bits represented by the ones in the subnet mask, and the host address is identified by the bits represented by the zeros.
In the example given, what is the network address and host address for the IP 192.168.123.132 with a /24 subnet mask?
-For the IP 192.168.123.132 with a /24 subnet mask, the network address is 192.168.123.0 and the host address is 132.
What will be discussed in the next session of the CCNA series?
-In the next session, the speaker will discuss IPv4 address classes.
Outlines
π Understanding IPv4 Addressing and Subnet Masks
This paragraph introduces the fundamental concepts of IPv4 addressing, emphasizing the importance of unique network numbers and IP addresses for each machine within a TCP network. It explains the division of IP addresses into network and host portions, which are crucial for network identification and host differentiation. The role of the subnet mask is highlighted as a tool to delineate the network and host parts of an IP address. The paragraph also provides an example using the IP address 192.168.123.132 with a /24 subnet mask, demonstrating how to determine the network and host addresses in both binary and decimal formats.
Mindmap
Keywords
π‘IPv4 Address
π‘Network Part
π‘Host Part
π‘Subnet Mask
π‘Class of Network
π‘TCP/IP
π‘Unique IP Address
π‘Binary Format
π‘Network Address
π‘Host Address
π‘Dotted Decimal Format
Highlights
Introduction to CCNA series discussing IPv4 address, network, and host portion.
Explanation of subnet mask and its role in differentiating network and host portions of an IP address.
IP addresses are divided into network and host parts, with the network part specifying the unique number assigned to a network.
Each machine on a network must have a unique IP address, with the same network part but different host part.
Subnet mask is a 32-bit number that indicates which part of the IP address is the network and which is the host.
Subnet mask is compared bit by bit with the IP address to determine the network and host portions.
Example given to illustrate how to determine the network and host address using a subnet mask.
Conversion of subnet mask to binary format to identify the network and host portions.
Network address and host address are separated by aligning the IP address with the subnet mask.
Binary format of network and host addresses are explained using the example of IP address 192.168.123.132 with a /24 subnet mask.
Conversion of binary network and host addresses to decimal format.
Network address in decimal format is 192.168.123.0 for the given example.
Host address in decimal format is 132 for the given example.
Importance of understanding network and host portions for proper IP address configuration.
Upcoming session on IP address classes announced.
Closing remarks with a request for likes, shares, and subscriptions.
Transcripts
hello everyone in today's session of
ccna series i'll discuss about
ipv4 address network
and host portion also we'll discuss
about
subnet mask
each network running tcp must have a
unique network number
and every machine on it must have a
unique ip address
the bytes of ip addresses are further
classified into two parts
the network part
and the host part the network part
specifies the unique number
assigned to your network it also
identifies
the class of the network assigned
hostpart is a part of the ip address
that you assign to each host
it uniquely identifies this machine on
your network
note that for each host on your network
the network part of the address
will be same but the host part must be
different
but how do host know which portion of
32-bit is network and which
is host that is the job of the
subnet mask in tcp the parts of the ip
address that are used as the network and
host addresses are not fixed
so the network and the host addresses
above cannot be determined unless
you have more information this
information is supplied in another
32-bit number
called a subnet mask when an ip host is
configured
a subnet mask is assigned along with an
ip address
similar to ipv4 address the subnet mask
is represented in
dotted decimal format for ease of use
like the ip address subnet mask is
32 bits long the subnet mask
signifies which part of the ip address
is network
and which part is host the subnet mask
is compared to the iep address from
left to right bit by bit the ones in the
subnet mask represent the network
portion and the zeros represent
the host portion
note that the subnet mask does not
actually contain the network or host
portion as an ip address it just tells
the computers where to look for these
portions in a given ipv4 address
let's take an example to determine the
network address and the host address
of below ib 192.168.123.132
in this example the subnet mask is slash
24 or you can call it as
255 to 55-55.0
so the subnet mask if you convert in
binary will be
24 zeros sorry 24
ones and eight zeros
lining up the ip address and the subnet
mask together
the network and the host portion of the
address can be separated
the first 24 bits the number of the ones
in the net mask are identified as the
network address
with the last eight bits the number of
remaining zeros in the subnet mask
identified as the
host address this gives you the
following
network address in binary format
and the network address in decimal
format will be 192 168 123.0
and the host address in binary format
will be
which if we convert to decimal we will
have an host address as
132. so now you know for this
from this example slash 24 subnet mask
and the network id is 192
168 123.0 and the host address is
132. that's it for this session in my
next session i'll discuss about
ib address classes thank you for
watching please do like
share and subscribe thank you
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