what is DNS namespace

DNS namespace: a hierarchical, tree-structured list of DNS host names and domain names.

Starting at an unnamed root that is used for all DNS operations. Each domain can have additional chaild domains: a typical DNS namespace might be the google.com domain, which contains the us.google.com child domains within the same namespace, and host names also called leaf objests, representsing individual TCP/IP-enabled devices such as server1.austin.us.google.com, hplaserjet.sales.ee.google.com, or www.us.google.com

DNS namespace that you might find on the Internet.

The DNS namespace has a hierarchical structure, and each DNS domain name is unique within a namespace.

• In Diagram at that top of the Internet DNS namespace is root domain. The root domain is represented by "." ( A Period).
  

• Under the DNS root domain, the top-level domains,or first-level domain, are organizational types such as .com , .edu, .org.

• Infrastructure domain : google is the Internet's infrastructure domain name.
  

what is DNS

Domain Name System (DNS) is a Service or Server, an Internet service that translates domain names into IP addresses.

Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. Domain Name System (DNS) the primarymeans of name resolution in Active Directory and on major TCP/IP networks such as the internet.

Concepts of DNS such as

• DNS namespace
• DNS query
  
• DNS zones
• DNS server
• DNS records
• DNS resolvers
• DNS server cache
• DNS round robin

what is computer network

Simple definition of computer Network : Physical connection of all the inter networking devices connected together is called Network.

Summary: A computer network, time and again simply referred to as a network, is a group of computers and devices linked by communications channel that facilitate communications between users and allows users to share resources with other users. Networks may be classified according to a wide range of characteristics.

Computer networks can be used for several purposes:

• Sharing files
• Sharing software
• Facilitating communications.

what is intranet

Simple definition of Intranet : The Network connect with in the network is called intranet.

Summary:An intranet is a private computer network that uses Internet Protocol technology to securely share every part of organization information within that organizations. The expression is used in compare to internet, a network between organizations, and instead refers to a network within an organization. Sometimes the term refers only to the organization's internal website, but may be a more extensive part of the organization's information technology infrastructure. It may host multiple private websites and constitute an important component and focal point of internal communication and collaboration

An intranet is built beginning the same concepts and technologies use for the Internet, such as client–server computing and the Internet Protocol Suite /Internet Protocol (TCP/IP). one of the well known Internet protocols may be found in an intranet, such asHypertext Transfer Protocol ( HTTP) means web services), Simple Mail Transfer Protocol (SMTP) means e-mail, and File Transfer Protocol (FTP) means file transfer. Internet technologies are often deployed to provide modern interfaces to inheritance information systems hosting corporate data.
An intranet can be understood as a private analogy of the Internet, or as a private extension of the Internet restricted to an organization. The first intranet websites and home pages begin to appear in organizations in 1990-1991.

what is internet

Simple definition of Internet : A Network which is connect with another network is called Internet that is network of networks.

Summary:
This internet use the standard Transmission Control Protocol/Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks of local to global scope that are linked by a broad array of electronic and optical networking technologies. The Internet carries a vast array of information resources and services, most notably the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail.

The Internet has no centralized governance in either technological implementation or policies for access and usage; each constituent network sets its own standards. Only the overreaching definitions of the two principal name spaces in the Internet, the Internet Protocol address space and the Domain Name System, are directed by a maintainer organization, the Internet Corporation for Assigned Names and Numbers (ICANN). The technical underpinning and standardization of the core protocols (IPv4 and IPv6) is an activity of the Internet Engineering Task Force (IETF), a non-profit organization of loosely affiliated international participants that anyone may associate with by contributing technical expertise.