Cookies are used to store a variety of shared state information between your browser and a web server. The most common use for cookies is to maintain your session state, since HTTP in itself is a stateless protocol.
The SSLv2 protocol is an obsolete version of SSL that has been deprecated since
1996 2011 due to having several security flaws. Current standards (2016) are SSL 3.0 and TLS 1.0TLS1.0-1.2 with SSL being fully deprecated, however, a common finding in Nessus scans of web servers SSLv2 is still enabled. IIS through v7 and Apache with OpenSSL prior to v1.0 have it enabled by default.