DevNet Associate DEVASC 200-901 Official Certification Guide by Adrian Iliesiu (z-lib.org)

Table 16-3 shows decimal and binary representations of
this IPv4 address.

Table 16-3 IPv4 Address Representation with

Decimal and Binary Values

Decimal 192 168 48 65

Octet/bin

ary

110000

00

101010

00

001100

00

010000

01

An IP address consists of two parts:

Network ID: The network address part starts from the leftmost bit

and extends to the right. Devices on a network can communicate

directly only with devices that are in the same network. If the

destination IP address is on a different network than the network the

source IP address is on, a router needs to forward the traffic between

the two networks. The router maintains a routing table with routes to

all the networks it knows about.

Host ID: The host address part starts from the rightmost bit and

extends to the left. The host ID uniquely identifies a specific device

connected to the network. Although the host ID can be the same

between different devices on different networks, the combination of

network ID and host ID must be unique throughout the network.

In order to accommodate networks of different sizes, IP
addresses are organized into different classes. There are
in total five classes of IPv4 addresses. Classes A, B, and C
are available for public use; Class D is used for multicast
addresses; and Class E is reserved for research and is not
available for public use. The Internet Assigned Numbers
Authority (IANA) manages the assignment and
allocation of IP addresses to Internet service providers
(ISPs), which in turn assign IP address ranges to their
customers. The five classes of IPv4 addresses are
described in Table 16-4.

Table 16-4 Classes of IPv4 Addresses