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Glossary - definitions of key words
Index:
Domain Name
DNS
DNS Records
IP Address
Server
SMTP
SSL
TCP/IP
JavaScript & Cookies
Domain Name
A domain name represents the location of an organization or other entity on the Internet. For example, www.entergroup.com locates an Internet address for "entergroup.com" at a particular IP address and a particular host server named "www."
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DNS
DNS stands for Domain Name System. DNS is a set of software and protocols that translate a domain like entergroup.com into an IP address such as 193.237.23.21 for TCP/IP communications. A DNS query is a request for such a translation. When Web browsers like Internet Explorer and Netscape look for an address such as http://www.entergroup.com, they generate DNS queries.
For information about domain names in general, registering a domain name or domain name availability, visit, http://www.networksolutions.com
A prefix before a domain name, such as www, is not actually part of a domain name. This prefix is part of the location of where a site or mail for that domain may be hosted. The prefix www is common for most domain names, however a domain name can easily have a different prefix such as mail.entergroup.com
When registering a domain name, you must specify a host name like www which signifies where the domain actually resides. This is host name is called the DNA host. To register you will also need to supply Administrative contact information, Technical Contact information and the name and location of the DNS server. You cannot register a domain without a DNS host. Registries may host your domain on their DNS server, however, they might not host a MX record or CNAMES (see below), which are required for mail services to work properly.
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DNS Records
The DNS system maintains many types of records. The crucial record types for EnterGroup applications are MX and CNAME records.
The MX (Mail Exchange) Record is the path within the DNS zone file that directs mail for a specific domain to the appropriate mail server. The MX Record identifies to the rest of the world wide web where a mailbox is located.
A CNAME (Canonical Names) is an alias for another domain name. To identify the EnterGroup POP, IMAP and SMPT servers, we employ CNAME records. These same CNAME records enable our application partners' users to send, receive and access mail via their name rather than directly through our own domain name.
Application partner's should not use A records or IP addresses in place of CNAME host names. Note: when the EnterGroup mail server is defined through an A record in the partner's DNS, mail service will be disrupted if we change the IP address.
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IP Address
A 32-Bit address assigned to hosts using TCP/IP. An IP address belongs to one of five classes (A,B,C,D or E) and is written as 4 octets separated by periods (for example 195.172.21.23), also called the dotted decimal format. Each address consists of a network number, an optional subnetwork number and a host number. The network and subnetwork numbers together are used for routing, while the host number is used to address an individual host within the network or subnetwork. A subnet mask is used to extract network and subnetwork information from the IP address - also called the Internet address.
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Server
A system program that awaits requests from client programs across a network and services those requests. A server can be dedicated, in which case this is its sole function, or non-dedicated, where the system can be used in other ways such as a workstation.
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SMTP
SMTP (Simple Mail Transfer Protocol) is the TCP/IP standard protocol for transferring electronic mail messages from one machine to another. SMTP specifies how two mail systems interact and the format of control messages they exchange to transfer mail.
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SSL
SSL (Secure Socket Layer) is encryption technology for the Web used to provide secure transactions (for example the transmission of passwords over the Internet).
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TCP/IP
TCP/IP (Transmission Control Protocol/Internet Protocol) is a common name for the suite of protocols developed in the 1970's to support the construction of worldwide internetworks. TCP and IP are the two best known protocols in the suite.
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JavaScript & Cookies
Cookies are small amounts of data stored by the web browser. They allow our webmail websites, in EnterGroup's case our webmail system to store particular information about a user and retrieve it every time you return to check your email. Each user has its own unique set of cookies.
JavaScript lets us retrieve those browser cookies which in turn enables you to log into the webmail faster. We absolutely do not track any by the users as clearly explained in our Privacy Policy.
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