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| Session Initiation Protocol (a peer to peer protocol) |
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| What layer of the IP suite does SIP belong to? |
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| What 3 protocols can SIP run on? |
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| Stream Control Transmission Protocol |
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| Uniform Resource Identifier. Identifies each resource on a SIP network (such as a voicemail box) |
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| What is the URI scheme used for SIP? |
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| What is the URI scheme if secure transmission is required? |
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| Transport Layer Security. Used at every hop through which a SIP transmission is forwarded |
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| Sip typically uses TCP or UDP on what port numbers |
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| 5060 (for non-encrypted traffic) and 5061 (for encrypted traffic) |
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| SIP's 4 primary functions are: |
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Definition
| Call signaling,call setup, call teardown, and modifying existing calls for voice and video |
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| Voice and video stream communications are carried over what Application-layer protocol? |
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| Real-time Transport Protocol |
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| Parameters (codecs, protocols, port numbers) for media streams are defined and negotiated by what protocol |
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| Session Description Protocol (transported in the SIP packet body) |
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| Public Switched Telephone Network |
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| International Telecommunication Union |
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| Name 3 other VoIP signaling protocols |
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| Media Gateway Control Protocol |
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| User Agent: a logical network endpoint used to create or receive SIP messages and manage a SIP session |
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Definition
| An intermediary entity that acts as both a server (UAS) and a client (UAC) for the purpose of making requests on behalf of other clients. |
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| A server that accepts REGISTER requests so that a location service can register IP addresses to a certain SIP URI |
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| A User Agent that generates 3xx (redirection) responses to requests it receives, directing the client to an alternate set of URIs |
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Definition
| Session Border Controller |
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| Session Border Controller |
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Definition
| Serves as a middlebox between a UA and a SIP server for things such as network topology hiding, and assistance in NAT traversal |
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| Used to interface a SIP network to other networks, such as the PSTN |
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| used by a UA to indicate its current IP address and the URLs for which it would like to receive calls |
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| Used to establish a media session between User Agents |
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| confirms reliable message exchanges |
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| terminates a pending request |
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| Terminates a session between 2 users in a conference |
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| requests information about the capabilities of a caller, without setting up a call |
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Term
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| Provisional Response Acknowledgement. Imporves network reliability by adding an acknowledgement system to the provisional responses (1xx) |
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| Provisional 1xx (SIP response code) |
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Definition
| request received and being processed |
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Definition
| The action was successfully received, understood, and accepted |
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| further action needs to be taken to complete the request |
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| the request contains bad syntax or cannot be fulfilled at the server |
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| The server failed to fulfill an apparently valid request |
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| The request cannot be fulfilled at any server |
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| responds to requests with one or more responses |
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| establishes a long-running conversation referred to as a Dialog, and includes ACK of any non-failing final response |
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| a long-running conversation in SIP |
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| Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions. It is a SIP-based suite of standards for instant messaging and presence information |
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| Message Session Relay Protocol. Allows instant message sessions and file transfers |
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| a test specification language used to specify conformance tests for SIP implementations |
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| Session Initiation Protocol with encapsulated ISUP |
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| ISDN User Part, a protocol used to create, terminate, and modify communication sessions based on ISUP using SIP and IP networks |
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