Question: In E-UTRAN's X2 Application Protocol (X2AP), when representing Information Elements (IEs) as bit strings without specific semantic description, how are the bits ordered?
Option 1: Most Significant Bit (MSB) on the rightmost side, Least Significant Bit (LSB) on the leftmost side.
Option 2: Dynamic ordering based on the type of IE being represented.
Option 3: Most Significant Bit (MSB) on the leftmost side, Least Significant Bit (LSB) on the rightmost side.
Option 4: Ordering is determined by the importing specification's default bit string format.
Explanation: This correct ordering principle ensures consistency in how bit strings are interpreted across E-UTRAN's X2AP, especially when integrating information from various specifications. Placing the MSB on the leftmost side and the LSB on the rightmost side is a standard convention in telecommunications for reading and processing binary data, facilitating accurate communication between network elements.