General Networking Doubt regarding IP address

DevOps
#1

I had a general query about adding an IP address to a host in Linux.
In one of the lectures, I saw the IP address is added as follows :
sudo ip addr add 172.16.239.16/24 dev eth0

This will assign 172.16.239.16 IP to the host system…right?
Doesn’t the “/24” define a range of IP address for a subnet? shouldn’t that be “/32” which is a single IP address?

And I also saw that we were adding multiple IP addr with different network address for a jump_host on the same ethernet adapter (eth0). Shouldn’t an adapter be associated with single IP?

Can someone please clear this concept for me?

#2

Hi anish9461,

The concept of creating or configuring multiple IP addresses on a single network interface is called IP aliasing. IP aliasing is very useful for setting up multiple virtual sites on Apache using one single network interface with different IP addresses on a single subnet network.

The main advantage of using this IP aliasing is, you don’t need to have a physical adapter attached to each IP, but instead, you can create multiple or many virtual interfaces ( aliases ) to a single physical card.

Referred to :