Certified Incident Handler (CIH) Practice Ecam

Which encoding scheme replaces unusual ASCII characters with "%" followed by the character's two-digit ASCII code?

1. UTF-8 encoding

2. Base64 encoding

3. ASCII encoding

4. URL encoding

The correct answer is: URL encoding

The correct answer is URL encoding, which is a method used to encode special characters in URLs. In URL encoding, characters that are not allowed in URLs or have special significance are replaced with a percent sign "%" followed by two hexadecimal digits that represent the ASCII code of the character. For example, a space character is encoded as "%20". This encoding is essential for ensuring that URLs are transmitted reliably over the internet. Certain characters, like spaces, question marks, and ampersands, can interfere with the structure of URLs. By encoding these characters, URL encoding allows for the safe passage of information in web requests. UTF-8 encoding, on the other hand, is a character encoding capable of encoding all possible characters (code points) in Unicode. It does not specifically replace unusual ASCII characters with a percentage sign. Base64 encoding serves a different purpose: it encodes binary data into ASCII text by converting it into a string of characters that are safe for transmission over protocols that may not support binary data directly. ASCII encoding focuses on a character set that includes the standard 128 characters used in English and does not include a conversion mechanism for unusual characters through a percentage sign methodology. Thus, URL encoding is uniquely positioned to handle the representation of characters in