<P> A realm is commonly appended to a user's user name and delimited with an' @' sign, resembling an email address domain name . This is known as postfix notation for the realm . Another common usage is prefix notation, which involves prepending the realm to the username and using' \' as a delimiter . Modern RADIUS servers allow any character to be used as a realm delimiter, although in practice' @' and' \' are usually used . </P> <P> Realms can also be compounded using both prefix and postfix notation, to allow for complicated roaming scenarios; for example, somedomain.com \ username@anotherdomain.com could be a valid username with two realms . </P> <P> Although realms often resemble domains, it is important to note that realms are in fact arbitrary text and need not contain real domain names . Realm formats are standardized in RFC 4282, which defines a Network Access Identifier (NAI) in the form of' user@realm' . In that specification, the' realm' portion is required to be a domain name . However, this practice is not always followed . RFC 7542 replaced RFC 4282 in May 2015 . </P> <P> When a RADIUS server receives an AAA request for a user name containing a realm, the server will reference a table of configured realms . If the realm is known, the server will then proxy the request to the configured home server for that domain . The behavior of the proxying server regarding the removal of the realm from the request ("stripping") is configuration - dependent on most servers . In addition, the proxying server can be configured to add, remove or rewrite AAA requests when they are proxied over time again . </P>

What is the name of the radius client computer that requests authentication