Requesting a secure connection from a server is a simple task for a client. However, the server providing that secure connection needs to use a large amount of processing power. An SSL flood or renegotiation attack takes advantage of this asymmetric workload by requesting a secure connection, and then renegotiating that relationship. These are two […]

A SIP proxy is the server controlling the management of connections and IP addresses in a SIP-enabled network.

A SIP proxy server controls calls and IP addresses in a SIP-enabled network.

A SIP VoIP gateway is a device that enables a user to place VoIP calls using session initiation protocol (SIP). SIP is a telephony technology developed as a fast, easy standard for delivering IP-based voice, data, and video communications.

A service-level agreement is a negotiated contract between a customer and a service-provider that defines the level of service the customer can expect, using measurable and verifiable terms. SLAs often refer to the level of performance or time of delivery agreed to under contract. Examples of metrics used to define an SLA include percentage of […]

SNMP was designed to help manage devices and hosts in complex multi-vendor networks. Compared to previous monitoring and management methods, SNMP reduces the amount of processing overhead on the network element. Reduced overhead and a common platform enables growth and platform independence. This allows SNMP to be used on almost every IP network, often using […]

SOA (Service Oriented Architecture) is a deployment methodology relying on the integration of and interaction between loosely coupled services. A SOA is built by extracting common blocks of reusable business logic and creating business services that can be orchestrated to allow users to perform business processes.

Recovery Time Objective (RTO) is the maximum acceptable amount of time for restoring a network or application and regaining access to data after an unplanned disruption. Loss of revenue and the extent to which a disrupted process impacts business continuity can both have an impact on RTO.

Real-Time Streaming Protocol (RTSP) gives applications the ability to stream voice and video using standard controls such as “play” and “pause.” This protocol was developed in the late 1990s. It is a foundation for the current convergence of communications, and it’s used by QuickTime, Windows Media Player, RealPlayer, MPEG4IP, Skype, and similar applications. The multiple […]

Stream Control Transmission Protocol (SCTP) was built to carry call control signals using IP networks. SCTP was created in 2000, and it’s often considered the next generation of TCP. This powerful protocol improves upon TCP and UDP by integrating components of each, and it can provide innumerable benefits to connection-oriented communications.