Computer generated processes require unique address to send and receive information. Port numbers are used for that purpose.
Process socket is a combination of host IP and process port number. Easy example is the Telnet service that is using port 23 by default. Knowing host IP address (for example 12.34.45.56) the socket address can be created (12.34.45.56:23). Even though Telnet’s default ...
DNS is the hierarchical way of associating domain names with IP addresses. It includes the network of databases and computers, together with the Application layer service. DNS is relying on multiple databases spread out across the globe, instead of using single file.
DNS can be divided to the components for effectiveness:
Resolvers are the clients that require domain name information. HTTP is ...
In the times when Internet was not bigger than 1000 hosts, all the nodes in the network relied on the single file called HOSTS.TXT that was containing list of host names and their IPs.
Today, this type of IP address association can be seen very rarely. Network is relying on the text file that looks similar to the one shown in ...
The group of computers that belong to the same company/organisation and share the part of the IP address is called domain. It can be identified by the domain name, that is usually representing type of the company/organisation.
In networking term Fully Qualified Domain Name (FQDN) is referring to a local host name together with its domain name.
Domain name consists of characters ...
DHCP lease can be either terminated by user or network administrator, or it may expire. Lease termination may be forced when the DHCP server is changed.
On Windows termination is done from Command Prompt by using “ipconfig /release” command. This command will erase all the IP, gateway, and subnet mask data from TCP/IP configuration file.
In order to request new IP data, ...
Private addresses are used for internal network of the company, organisation, or the household. Since they are used for internal network, private addresses can not be used for accessing the Internet. Public addresses, however, can and should be used by organisations for external connection to the Internet. The ranges of available internal IPs are shown in Table 1.
Table 1. IPs ...
Zeroconf (Zero Configuration) is the collection protocol used for link-local IP assignment and service discovery. Zeroconf is only used if DHCP is not available, since it is located on clients machine. When DHCP is available again, the Zeroconf releases its assigned IP and uses the one provided by DHCP server.
IPv4LL (IPv4 Link Local) protocol is used for address assignment when ...
Leasing - is the process of borrowing of an IP by the device, while it is connected to the network. When the client is connected to the network for the first time, the IP is obtained from the DHCP server. It can be used for specified period of time depending on DHCP server and client configuration. If the defined time ...
Assigning IP addresses to all the end devices in the network is the main task of the DHCP. So called DHCP server is assigning the IP addresses and terminating those when they are not required anymore. DHCP server stores and modifies information about IPs that already are in use, that will be available soon, and which are not allowed. In ...
This article is intended to show difference between IPv4 and IPv6. It introduces the list of new features that IPv6 is offering.
When you see IPv6 address it is easy to notice how differently it is written. While IPv4 is written in a form of four decimal numbers separated by a period, the IPv6 is having eight hexadecimal numbers separated by ...
