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HttpTcpFtpSoapDhcpUdp

HTTP1. It is foundation of data communication for www.2. protocol to exchange or transfer the hypertext.3. request-response protocol in client server computing model.4. It is a pull protocol5. It runs over the TCP/IP connection.6.Two versions of http http/1.0http/1.1http request http responseIt consists of status code 3digit no.Ex: 200 ok 404 not foundDifference between http and httpsWhy not to use https everywhere instead of httpTCP1.core protocols of Ipsuite(TCP/IP)2.provides reliable,ordered &delivery of stream of octects b/w the programs on LAN3.web browsers use tcp when they connect to servers on www4. segments to IP layer.FTP1.N/w protocol used to transfer the file from one host to another over the internet.2.It is built on aclient server architecture3.FTP is oftensecured with SSL4.authenticate with username and passworddifferent from http:setup control connection is quite slow,re-establish the session each time is difficult,the firewall may decide connection got dead.DHCP1.Dynamically distributing network configuration parameters, such as IP addressfor services2.This protocol also supports static Ip address for example web servers.3.operations:discoveryofferrequestacknowlegmentUDP:1.Simple connectionless transmission protocol2.No guarantee of delivery,ordering or duplicate protection.3.Communication is achieved by transmitting information in one direction from source to destination without verifying the state of receiver.4.UnreliableNot orderedlightweightSOAP:1.exchange of structured information in the implementation of webservices in computer n/w.2.uses XML information set3. 3 characteristicsextensibilityneutralityindependence4.It may also be used over https with either simple authentication.Soap structure:envelope- identifies the xml doc. As msgheader- info. Of headerbody-call and response info.fault-info abt the errors that occur while processing the msg.Advantages:1.It tunnels fine with http response models2.easily tunnel over the existing firewall without modifications to the soap protocol.ONVIF:It is a standard for talking to n/w camera devices & other similar hardwareIt is commited to standardise communication b/w n/w devices to ensure interoperability b/w n/w products for security market.Why do we use onvif:focus on interoperabilityBenefits:Global common platform

Interoperable products from various brandsOnvif specifications :Device managementDevice discoveryEvent frameworkIt has profiles like Profile S:1.Common funtionalities shared by onvif conformant video management system and devices like IP cameras .2.Used for IP based video systems.

Profile C:1.Used for IP based access control2.A no. Of services and functionalities are mandatory for each type of onvif profile3.Onvif client may support any combination of profiles and other optional services and functonalities.Profile G:1.It is for storage and retrieval design2.It is an onvif device that records video data over an IP network or on the device itself.

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