400. X.400 is a set of standards for electronic mail exchange between computer systems, originally defined by the International Telegraph and Telephone Consultative Committee (CCITT) in 1984. The standards were later revised by the International Organization for Standardization (ISO) in 1988 and again in 1996.
X.400 defines a message handling system (MHS) which is a framework of protocols and services for the exchange of electronic messages. The core protocol of the MHS is the X.400 Message Transfer System (MTS), which is responsible for routing messages between systems.
X.400 also defines a number of other protocols and services which can be used in conjunction with the MTS, such as the X.400 Message Delivery System (MDS) for message delivery, the X.400 Message Access System (MAS) for message access, and the X.400 Message Conversion System (MCS) for message conversion.
X.400 is designed to be interoperable with a variety of other message handling systems, including the Internet Mail system, the SMTP/MIME system, and the X.500 Directory system.
What is x400 protocol?
The x400 protocol is a set of standards for electronic mail exchange, developed by the International Telecommunication Union (ITU). The x400 standards cover message format, message handling, and message routing. The x400 protocol is the basis for many of the modern email systems in use today.
What are X 400 and X 500 in application layer what are their functions?
The X.400 and X.500 standards are two of the most important standards in the application layer of the OSI model. They define the format of electronic messages and the way in which they are exchanged between computers.
X.400 is the standard for message handling systems, which are used to store, forward, and exchange electronic messages. X.400 is based on the earlier X.25 standard, which defined the format of electronic messages but did not specify how they should be exchanged between computers.
X.500 is the standard for directory services, which are used to store information about people and organizations in a central location. X.500 is based on the earlier X.500 standard, which defined the format of directory information but did not specify how it should be exchanged between computers. Is x400 EDI communication standard? Yes, x400 EDI communication standard is a standard that defines how electronic data should be formatted and exchanged between organizations.
What are x400 addresses used for?
The x400 address standard was developed by the International Telegraph and Telephone Consultative Committee (CCITT) in 1984 as a way to standardize the way electronic mail is addressed. The x400 address is made up of four fields: Country Code, Administration Domain, Private Domain, and Local-Part. The Country Code and Administration Domain identify the country and organization that the email is being sent to, while the Private Domain and Local-Part identify the specific user or mailbox that the email is intended for.
The x400 address standard has largely been superseded by the Internet-standard email address format, which uses the "@" symbol to separate the user name from the domain name. However, some organizations still use x400 addresses, and the standard is still used by some email systems.
Which standard applies email as a message handling protocol?
There is no single standard that applies to email as a message handling protocol. However, there are a number of standards that cover various aspects of email, such as the format of email messages, the way email is transmitted, and the way email is stored.