Referring to the URL being accessed that is shown here, which encoding is used to represent the URL in ASCII?

The URL “www.xn--gwtq9nb2a.jp” is encoded using Punycode. Punycode is a way to represent Unicode characters with the limited character subset of ASCII (American Standard Code for Information Interchange), which is primarily used for Internet host names. This encoding is commonly used in the Internationalized Domain Names (IDNs), allowing domain names containing non-ASCII characters to be represented in the ASCII-only DNS environment.

The “xn--” prefix in the URL is a key indicator that Punycode encoding is being used. Unicode, UTF-32, and EUC are other character encodings, but they are not used for representing URLs in ASCII as Punycode is.