Which of the following protocols encrypt the segments of network connections at the Transport Layer end-to-end? Each correct answer represents a complete solution. Choose two.

A.
SSL

B.
HTTPS

C.
SNMP

D.
TLS

Explanation:
Transport Layer Security (TLS) and its predecessor. Secure Sockets Layer (SSL), are cryptographic protocols that provide security for communications over networks, such as the Internet. TLS and SSL encrypt the segments of network connections at the Transport Layer end- to-end.

Several versions of the protocols are in widespread use in applications like web browsing,

electronic mail,Internet faxing, instant messaging and voice-over-IP (VoIP).

The TLS protocol allows client/server applications to communicate across a network in a way designed to prevent eavesdropping and tampering. TLS provides endpoint authentication and communications confidentiality over the Internet using cryptography. TLS provides RSA security with 1024 and 2048 bit strengths.

In typical end-user/browser usage, TLS authentication is unilateral: only the server is authenticated (the client knows the server’s identity), but not vice versa (the client remains unauthenticated or anonymous).

TLS also supports the more secure bilateral connection mode (typically used in enterprise applications), in which both ends of the “conversation”‘ can be assured with whom they are communicating (provided they diligently scrutinize the identity information in the other party’s certificate). This is known as mutual authentication, or 2SSL. Mutual authentication requires that the TLS client-side also hold a certificate (which is not usually the case in the end-user/browser scenario). Unless, that is. TLS-PSK. the Secure Remote Password (SRP) protocol or some other protocol is used that can provide strong mutual authentication in the absence of certificates.

Typically, the key information and certificates necessary for TLS are handled in the form of X.509 certificates, which define required fields and data formats. SSL operates in modular fashion. It is extensible by design, with support for forward and backward compatibility and negotiation between peers.

Answer option B is incorrect. Hypertext Transfer Protocol Secure (HTTPS) is a protocol used in the Universal Resource Locater (URL) address line to connect to a secure site. When an SSL connection is established between a Web browser and a Web server,HTTPS should be entered, instead of HTTP, as the protocol type in the URL. HTTPS uses TCP port 443 as the default port.

Answer option C is incorrect. The Simple Network Management Protocol (SNMP) allows a monitored device (for example, a router or a switch) to run an SNMP agent. This protocol is used for managing many network devices remotely.

When a monitored device runs an SNMP agent, an SNMP server can then query the SNMP agent running on the device to collect information such as utilization statistics or device configuration information. An SNMP-managed network typically consists of three components: managed devices, agents, and one or more network management systems.