Question: What is a requirement for User Equipment (UE) that supports access subject to Extended Access Barring in E-UTRA networks?
Option 1: Support for Voice over LTE (VoLTE) as a complementary service.
Option 2: Implementation of an additional antenna for improved reception.
Option 3: Capability for Wi-Fi offloading for data-intensive services.
Option 4: Mandatory support for Extended Access Barring check as per RRC protocol specifications.
Explanation: In E-UTRA networks, for User Equipment (UE) subject to Extended Access Barring, supporting Extended Access Barring checks, aligning with Radio Resource Control (RRC) protocol specifications, is crucial. This ensures controlled network access, preventing overload and maintaining service quality. The other options are unrelated to managing network access under Extended Access Barring conditions.