Answer:
A
Explanation:
Every year, internet protocols are adjusted to accommodate the influx of new devices on the network. In the 1990s, traffic primarily utilized a few protocols. IPv4 managed packet routing, TCP handled those packets to establish connections, SSL (later TLS) secured those connections, DNS resolved hostnames, and HTTP was the main application layer protocol utilized.
For years, there were minimal modifications to the fundamental internet protocols; HTTP saw the addition of some new headers and methods, TLS underwent gradual updates, TCP improved congestion management, and DNS incorporated features like DNSSEC. Over a lengthy period, these protocols remained consistent as seen on the wire — with the exception of IPv6, which is regularly discussed among network operators.
Consequently, network administrators, vendors, and policymakers seeking to understand (and sometimes regulate) the Internet have implemented various practices based on the protocols’ wire ‘footprint’ — whether to troubleshoot issues, enhance service quality, or enforce policies.
Currently, there are considerable changes happening in core internet protocols. Although these updates aim to remain compatible with the wider Internet to ensure adoption, they might disrupt entities that have exploited undocumented features of existing protocols or assumed stability in certain aspects.
