Is ICE enabled on all SIP clients by default?

ICE, which stands for Interactive Connectivity Establishment, is a framework used for NAT traversal in SIP communications. It is an essential component for establishing peer-to-peer connections in a reliable manner, especially when dealing with various network configurations that can affect connectivity.

The correct answer is that ICE is not enabled on all SIP clients by default. This is primarily because not all SIP clients are designed with ICE support from the outset. Different clients may have different capabilities, and some may require explicit configuration to enable ICE functionalities. Additionally, certain implementations or specific deployment environments may lead to outcomes where ICE is either not supported or selectively enabled.

In summary, while ICE is a crucial technology for enhancing SIP communications, particularly in challenging network environments, its availability and default activation depend on the specific client being used and its design. This is not universally applicable across all SIP clients, which is why the statement is false.