When configuring a system for TLS 1.2 only use, you can make the Schannel keys at the same time and reboot the server once. An admin must modify the TLS 1.0 and TLS 1.1 portions of the Schannel registry section and turn the protocols off instead of turning them on.
The latest version is TLS 1.2. SSL 1.0: Netscape, broken, never saw a light of day. SSL 2.0: first public version of SSL, it used MD5. SSL 2.0 was the first publicly released version of the protocol, but it was quickly replaced by SSL 3.0 due to a number of discovered security flaws.
It is a separate hardware card that inserts into a web server. B. It contains one or more co-processors to handle SSL/TLS processing. C. It can be installed as a "virtual SSL/TLS server" alongside a forward proxy server.
However, it has also been adapted to run over datagram protocols such as UDP. The Datagram Transport Layer Security (DTLS) protocol, defined in RFC 6347, is based on the TLS protocol and is able to provide similar security guarantees while preserving the datagram delivery model.
Most modern browsers intentionally wait for the first TLS connection to complete before opening new connections to the same server: subsequent TLS connections can reuse the SSL session parameters to avoid the costly handshake.
Since the publication of TLS 1.0 in January 1999, two new versions have been produced by the IETF working group to address found security flaws, as well as to extend the capabilities of the protocol: TLS 1.1 in April 2006 and TLS 1.2 in August 2008. Internally the SSL 3.0 implementation, as well as all subsequent TLS versions, are very similar, and many clients continue to support SSL 3.0 and TLS 1.0 to this day, although there are very good reasons to upgrade to newer versions to protect users from known attacks!
Session resumption is important because a full handshake can take time: it has a high latency as it needs two round-trips and might involve expensive computation to exchange keys, or sign and verify certificates.
SSL 2.0 was the first publicly released version of the protocol, but it was quickly replaced by SSL 3.0 due to a number of discovered security flaws. Because the SSL protocol was proprietary to Netscape, the IETF formed an effort to standardize the protocol, resulting in RFC 2246, which became known as TLS 1.0 and is effectively an upgrade to SSL 3.0:
New TLS connections require two roundtrips for a "full handshake." Alternatively, an "abbreviated handshake" can be used, which re‐ quires one roundtrip.
Session IDs, assigned by the server, are unique identifiers under which both parties store the master secret and other details of the connection they established. The client may include this ID in the ClientHello message of the next handshake to short-circuit the negotiation and reuse previous connection parameters.
server and client authentication: it allows the client to verify that the server is who it claims to be (e.g., your bank) and not someone simply pretending to be the destination by spoofing its name or IP address. the server can also optionally verify the identity of the client—e.g., a company proxy server can authenticate all employees, each of whom could have his own unique certificate signed by the company.
A. Physical security appliances are not always designed to protect virtual systems.
D. Live migration can immediately move one virtualized server to another hypervisor.
A. It can prevent a DNS transfer attack.