Dynamic IP address
Today it is very common to find this term in the computing world, even if you are not an expert on the subject it is important to know what it is. Earlier it was explained that Internet Protocol address or IP for short, is like the "phone number" of your computer. Without it, the machine would not be able to connect to the Internet. Each computer, tablet, smartphone, or other device capable of connecting to the Internet has its own IP address. An IP address consists of a series of numbers and dots eg 192.168.1.1.
So what is a dynamic IP address? Well, a dynamic IP address is, as it can be predicted, the one that changes from time to time and therefore it is not always the same. If you have domestic cable or DSL internet service, it is most likely you have a dynamic IP address. All Internet Service Providers (ISP) provide customers with a dynamic IP address, this is because they are much more profitable. Rather than having an IP address just for a single user (a static IP address), your IP address is extracted from a pool of addresses and then assigned to a device. After a few days, weeks or even months, at times, that number is again stored and assigned a new number. This is because not always the devices are connected to the Internet all the time^, this strategy helps to recycle the IP addresses while they are not in use.
That is why a dynamic IP address can make difficult to remotely access a PC, DVR or webcam ,: because even if a user knows his/her IP address in a specific moment, five minutes later (for example) it could be different. Therefore, if a person is out and want to remotely access his/her personal computer, but this user has the wrong IP address (because it has chenged) then it will not be possible to connect to the machine at home.
The dynamic DNSs (Domain Name System) make dynamic IP addresses behave as if they were static (i.e. they do not change) although they are not. With the number of IP, a host name easy to remember is created. This host name is the URL you type into your browser to connect to your remote device. Our dynamic update client takes the host name (eg www.dominio.org) and joins the IP address of the client. When the Host IP address changes, our dynamic update client updates the IP address on our servers. In other words, the host name is permanently online and our IP is attached to this then the IP address of the client connection remains active and remains available all the time.
Sometimes routers have dynamic DNS server or dynamic domain name (DDNS) integrated into the router. With this feature, you do not need to download dynamic updates: simply enter the administrator settings on the router and configure your username, password, host name and IP number. This will automatically keep your connection active. Dynamic IP addresses are a bit annoying, but if you have the right software, you can forget about the problems that may cause and usually for free. Most ISPs do not provide a static IP address to residential customers and if they do, it is often very expensive.
It is important to remember that IP addresses are most frequently assigned dynamically on LANs and broadband networks by the Dynamic Host Configuration Protocol (DHCP). They are widely used because it avoids the administrative burden of assigning specific static addresses to each device on a network. It also allows many devices to share limited amount of address on a network especially when only some of those users are online at a particular time. In most current desktop operating systems, dynamic IP configuration is enabled by default so that a user does not have to manually enter the settings to connect to a network with a DHCP server. The DHCP server is not the only technology used to assign IP addresses dynamically. Dial-Up and some broadband networks use dynamic address features of the Point to Point Protocol.
Advantages and Disadvantages of Dynamic IP Adresses
In fact, IP Dynamics favor large-scale rather than individual users. Dynamic IP are used for short periods when a person no longer uses an IP either because it is not already connected to a public network or because they left the house and turned off the modem, IP addresses can be recycled and assigned to a new user; This optimizes the use of IP addresses as their number is limited. Additionally, those who like to join others' routers do not seek a particular direction but they are simply looking to see what IP is quite vulnerable to attack; this decreases the chance that you are vulnerable because your address is not fixed. Actually, even you have really important information that is risky if it falls into the wrong hands, a dynamic IP address is sufficient.
Sticky dynamic IP addresses
A sticky dynamic IP address is an informal term used by cable and internet subscribers to describe a dynamically assigned IP address which seldom changes. The addresses are usually assigned with DHCP. Since the modems are usually powered on for extended periods of time, the address leases are usually set to long periods and simply renewed. If a modem is turned off and on again before the next expiration of the address lease, it is pretty likely that a user may receive the same IP address.