The class B IP addresses use the first two octets as network identifiers, and the last two as host identifiers. The first octet in the class B IP addresses is in the to range. IPs from this class are most commonly used by mid-sized networks, such as college campuses. For this class, the Net identifier is composed of the first 3 octets and the first octet is in the to range.
The last octet is used to identify the host. With a limited number of hosts, this IP class is suitable for small to mid-sized networks. IP addresses from this class are mostly used for multicasting. They are in the The IP addresses in this class have the first octet in the range.
They are reserved for experimental usage and computers, trying to use them will not be able to communicate properly online. When looking at a standard IPv4 address, one can easily see that it has a finite number of combinations for unique IP addresses and that at some point, they will be over. Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community.
Start your free trial today. I am still a newbie. What do they do and what are they used for? An IP address is an address assigned to any computer including servers to identify it on a given network. An example of an IP address is your local computer's address that no one else can access: Every machine has this address.
It's also known as localhost. For the convenience of the human users, these IP addresses are stored in the format of a decimal number. Given below is an example of an IP address.
IP addresses are of two types: Static IP addresses, which are permanent, and are assigned to a host manually by an administrator, and Dynamic IP addresses, which are assigned anew each time the host is connected to the network by the server using DHCP. DNS or the Domain Naming System is a hierarchical system for naming computers or other resources connected to a network. It facilitates the naming of groups of users and resources, disregarding their physical locations, which simplifies things for general users, as they only have to know a URL or an E-mail address to access hosts or resources without worrying about how physically locate them.
It also contains a mapping system between domain names and their corresponding IP addresses or physical locations, so that it can locate the hosts or resource indicated by the domain names entered by Users. A typical domain name, which is formed according to the rules in DNS protocol consists of three or more parts referred to as labels , usually concatenated by dots.
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