2010년 10월 13일 수요일

protocol analysis

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TCP/IP and IMS Sequence Diagrams

The sequence diagrams were generated using EventStudio System Designer 4.0.

IP - Internet Protocol

IP Routing and Subnets

IP Routing and subnets explained.

ICMP Sequence Diagram pdf

ICMP sequence diagrams

ARP Sequence Diagram pdf

ARP sequence diagrams

BOOTP Sequence Diagram pdf

BOOTP sequence diagrams

DHCP Sequence Diagram pdf

DHCP sequence diagrams

NFS Protocol Sequence Diagram pdf
NFS Protocol Sequence Diagram (Summary) pdf

Network File System (NFS) sequence diagrams

TCP - Transmission Control Protocol

TCP Sequence Diagram pdf

TCP connection establishment, data transfer and close sequence diagrams

TCP Slow Start Sequence Diagram (Detailed) pdf

TCP Slow Start Sequence Diagram (Summary) pdf

TCP Slow Start probes the Internet to get a feel of its throughput...

TCP Congestion Avoidance Sequence Diagram pdf

This sequence diagram describes actions taken by TCP to prevent congestion in the Internet

TCP Fast Retransmit and Fast Recovery Sequence Diagram pdf

TCP can recover a lost segment quickly by looking for duplicate acks from the receiver.

TCP Summary for Client pdf

A summary of all TCP scenarios, just listing client end interfaces.

HTTP Sequence Diagrams

HTTP Sequence Diagram pdf

HTTP Thread 1 Interfaces pdf
HTTP Thread 2 Interfaces pdf

HTTP sequence diagram for loading of the EventHelix.com home page. The page load is captured in two threads. The sequence diagrams for individual threads are also included.

Web Caching and Refresh Sequence Diagram pdf

This sequence diagram based tutorial describes the web caching feature on the web browser side.

Web Page Redirection Sequence Diagram pdf
Web Page Redirection Collaboration Diagram pdf

The interactions involved in web page redirection using HTTP 302 code are covered here.

HTTP Post Sequence Diagram pdf

HTTP Post handling and lower level TCP interactions are shown in this diagram.

TCP Applications

FTP Sequence Diagram pdf

FTP Port 21 Sequence Diagram pdf
FTP Port 20 Sequence Diagram pdf

Here we explore the sequence of interactions in a typical FTP (File Transfer Protocol) session. Individual sequence diagrams for interactions on Port 20 and 21 are also included.

Telnet Sequence Diagram pdf

Telnet sequence covers terminal option negotiation and server handling.

SMTP E-Mail pdf

Sequence diagram describing SMTP e-mail send. DNS MX record interactions are also covered.

POP3 Sequence Diagram pdf

Interactions between a POP3 server and client are described here.

SSL Sequence Diagram pdf

Message sequence diagram describing the setup of a SSL secure connection.

VoIP Call Sequence Diagram

SIP to PSTN Sequence Diagram pdfCall flow describing the setup and release of a SIP to PSTN voice call.
SIP to ISDN PBX Sequence Diagram pdfSIP terminal to ISDN PBX Call.
H.323 Call Flow pdfH.323 message sequence chart covering H.225, Q.931, H.245, RTP and RTCP protocols..
H.323 Context Diagram pdfContext diagram describing H.323 interfaces.

IP Multimedia Subsystem (IMS) Sequence Diagrams

IMS RegistrationAn IMS terminal accesses the home IMS via a visited IMS. Unauthenticated registration followed by authenticated registration is covered here.
IMS to IMS Call FlowCall flow for an IMS subscriber to another IMS subscriber is covered here.
PSTN to IMS Call
A ISUP to IMS call flow is described here. Megaco/H.248 interactions and ISUP-SIP interworking are covered in detail.
IMS to PSTN Call
Here we explore an IMS to PSTN terminating call. The call flow covers the IMS-ISUP interworking and Megaco/H.248 interactions between the MGCF and IM-MGW. Call routing via the BGCF is also illustrated.
SDP Codec Selection and QoS Signaling in an IMS call pdfAn IMS call is analyzed with a focus on the SDP interactions involved in codec selection and QoS.
IMS Presence Subscription and Notification
IP Multimedia Subsystem (IMS) provides a framework for building advanced telecom services. One such service is network wide publication and subscription of presence information.
IMS Presence Resource List Subscription and NotificationThis scenario describes how a user can subscribe to a predefined list of subscribers via a Resource List Server. The RLS handles the interactions needed for presence subscription for individual users on that list.
IMS Conference Call
Setup of an IMS conference call with REFER based invitation to other subscribers.
IMS Push-to-talk Sequence Diagram - Pre-established SessionPush-to-talk communication between IMS users that have pre-established a session.

SIGTRAN Protocols

SCTP Sequence Diagram pdf

SCTP Context Diagram pdf
Stream Control Transmission Protocol (SCTP) is a relatively new transport protocol in the IP stack. It has been designed to carry Telecom signaling protocols over IP.

IP Routing Protocols

BGP Startup Sequence pdfThe sequence of interactions at the startup of a Border Gateway Protocol (BGP) router are described here.

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