Inter-domain routing is data flow control and

interaction Interaction is action that occurs between two or more objects, with broad use in philosophy and the sciences. It may refer to: Science * Interaction hypothesis, a theory of second language acquisition * Interaction (statistics) * Interaction ...

between

Primary Domain Controller On Microsoft Servers, a domain controller (DC) is a Server (computing), server computer that responds to security authentication requests (logging in, etc.) within a Windows domain. A ''domain'' is a concept introduced in Windows NT whereby a user m ...

(PDC) computers. This type of computer uses various computer protocols and services to operate. It is most commonly used to

multicast In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution. Multicast should not be confused wit ...

between

internet The Internet (or internet) is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a ''internetworking, network of networks'' that consists ...

domains.

Internet use

An Internet service provider, ISP, is provided with a unique

URL A Uniform Resource Locator (URL), colloquially termed as a web address, is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifie ...

access address. This address is a unique number. The number for each ISP is stored within a

DNS The Domain Name System (DNS) is a hierarchical and distributed naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names assigned to ...

server. The DNS servers interpret the ISP URL

Domain name A domain name is a string that identifies a realm of administrative autonomy, authority or control within the Internet. Domain names are often used to identify services provided through the Internet, such as websites, email services and more. ...

and provide the appropriate

IP address An Internet Protocol address (IP address) is a numerical label such as that is connected to a computer network that uses the Internet Protocol for communication.. Updated by . An IP address serves two main functions: network interface ident ...

number. The Domain is under the control of a specialized computer, called a

PDC PDC may refer to: In science and technology Chemistry, biology and medicine * Phosducin, a human protein and gene in the retina * Pyridinium dichromate (Cornforth reagent), a chromium-based oxidant * Pyruvate dehydrogenase complex, an enzyme ...

, (primary domain controller). This computer holds records of all the user accounts within the domain, their rights to access information, and lists of approved System Operatives. This PDC is backed up by an SDC, (a secondary domain controller), this computer synchronises itself with the PDC and takes over the role in the event of a PDC failure. Multiple

replication Replication may refer to: Science * Replication (scientific method), one of the main principles of the scientific method, a.k.a. reproducibility ** Replication (statistics), the repetition of a test or complete experiment ** Replication crisi ...

servers connect to these control computers and they are routed to the

Internet backbone The Internet backbone may be defined by the principal data routes between large, strategically interconnected computer networks and core routers of the Internet. These data routes are hosted by commercial, government, academic and other high-c ...

to provide the requested data to and from the domain.

Communication protocols

Internet protocols that are focused on inter-domain functions include: Border Gateway Multicast Protocol,

Classless Inter-Domain Routing Classless Inter-Domain Routing (CIDR ) is a method for allocating IP addresses and for IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the previous classful network addressing architecture on the Internet. Its ...

, Multicast Source Discovery Protocol, and

Protocol Independent Multicast 400px, Example of a multicast network architecture Protocol-Independent Multicast (PIM) is a family of multicast routing protocols for Internet Protocol (IP) networks that provide one-to-many and many-to-many distribution of data over a LAN, WA ...

Services

A PDC uses a number of special computer programs to announce its presence to other domain controllers. It uses Windows Internet naming service

WINS WINS may refer to: *WINS (AM), an all-news radio station in New York City *WINS-FM, a radio station in New York City *World Institute for Nuclear Security *Windows Internet Name Service *WINS (solution stack), a set of software subsystems *Wireles ...

and Browser services to allow other computers to gain access to digital information that it has control over.

Other

The opposite of inter-domain routing is intra-domain routing, routing ''within'' a domain or an

autonomous system Autonomous system may refer to: * Autonomous system (Internet), a collection of IP networks and routers under the control of one entity * Autonomous system (mathematics), a system of ordinary differential equations which does not depend on the inde ...

Internet use

Communication protocols

Services

Other

References

See also