Static IP vs Dynamic IP
An IP (Internet
Protocol) address is a label made up of numbers, which is assigned to
devices that are connected to a network. It is used to identify and
communicate with a device on a network. Static IP is a permanent IP
address assigned to a computer by an internet service provider (ISP).
Each time that computer connects to the Internet that particular IP
address will be used and it is not changed. Dynamic IP address is a
temporarily assigned IP address through the Dynamic Host Configuration
Protocol (DHCP).
What is a Static IP?
A static IP is a permanently assigned
IP address by an ISP to a device connected to a network. There are some
advantages of using static IP addresses. For example, there are some
network devices that do not support DHCP. In such a situation, using a
static IP would be the only option. Also, static IP addresses are more
reliable when it comes to name resolution. Due to this reason, it is
better to use static IP addresses with web servers and FTP servers.
Also, static IP addresses are more suitable for VOIP
(Voice over IP) and gaming. But having a static IP address is quite
expensive. Further, assigning static IP addresses to all the devices is
not possible since there would not be enough IP addresses (with IPv4),
and therefore most of the ISPs limit the number of static IPs they
provide. With the introduction of IPv6, the address space was increased
(since the address length was increased from 32-bits to 128-bits). This
would make the static IP addresses less expensive and easier to
maintain.
What is a Dynamic IP?
A dynamic IP address is an IP address
that is temporarily assigned to a device. After assigning static IPs,
the remaining address pool is used for this dynamic address assignment.
Providing a dynamic IP from this pool is done through the DHCP. A
computer has to request for a dynamic IP through the DHCP and this
provided address will last for a specified amount of time. When that
particular computer is disconnected from the Internet, the dynamic IP
goes back in to the pool and it can be assigned to another requester.
So, this is a very economical way of using the limited number of IP
addresses available in IPv4. Also DHCP eases the task of the
administrator, since it will automatically assign IPs to the customers.
What is the difference between Static IP and Dynamic IP?
Static IP is a permanent IP address
assigned to a device by an ISP, whereas a dynamic IP is a temporary IP
address assigned to a device. Dynamic IP addresses are assigned
automatically using the DHCP protocol from a pool of IP addresses, only
when a user wants to connect to the internet and it is put back in to
the pool when the user disconnects. So, dynamic IP provides a method to
use the available IP addresses economically unlike the static
addresses, which are permanently assigned. Further, Dynamic IP is less
expensive and therefore it is better to be used for typical access of
the Internet. But static IPs are better suited for Servers, VOIP applications and gaming.
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