Network World

research center:


Search / DocFinder:
Advanced search
Research Centers
Vendor Solutions
Site Resources
Special Issues

Signature SeriesEnterprise All-Stars
Enterprise All-Stars NEW

You in action
You in action

New Data Center The New Data Center: Wireless & Mobility
Wireless & Mobility NEW

The New Data Center: Server Virtualization
Server Virtualization

Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

XMPP (Extensible Messaging and Presence Protocol)

XMPP is an XML streaming protocol for presence and messaging routing. Recently ratified as an IETF standard, XMPP serves as the basis for the Jabber instant-messaging system and provides a secure but easily programmed language for linking diverse networks.

The core of XMPP routing is an internationalized logical addressing scheme that is best represented as node@domain/resource. In the Jabber IM system this scheme is referred to as the Jabber ID (JID). The domain portion can be looked up in the DNS, similarly to an e-mail address. As in Simple Mail Transfer Protocol, servers (the domain portion of an SMTP address) connect with one another on behalf of users (the node portion of an SMTP address). In XMPP, the node portion can denote an IM user, an application or a service. The resource portion is a connection identifier that lets a single user be logged on multiple times simultaneously.

When nodes connect to a server, they authenticate using credentials from the local directory system, specify a resource and tell to the server to announce their presence to subscribers (for example, the buddies on one user's roster). Servers find, connect and authenticate to one another, letting any node connected to the community talk to any other node regardless of their home server (domain), as long as no privacy or business rules are violated.

Each XMPP stanza is a chunk of XML structured data that is addressed to a JID. Each stanza type can be extended with any properly name-spaced XML structured data. The Jabber Software Foundation (JSF) acts as a standards body for these extensions, much like the World Wide Web Consortium standardizes Web formats. But any organization or set of trading partners also can decide on de facto formats as needed.

From XMPP transports presence data, Network World Tech Update, 03/08/04.


Additional resources

Latest XMPP specifications and drafts

IETF XMPP working group

Add a comment

NOTE: Comments are reviewed by an editor before being posted.

Your rating of this resource (with 5 the best)
1 2 3 4 5


Your user name (what other users will see on the review):

Your real name (for our records only):

Your e-mail (ditto):

Your comments (Use a blank line to separate paragraphs):


Sign up for one of NWW's Application newsletters.

Web Applications
Network Optimization
Network Systems Management
Network/Systems Management News Alert
View all newsletters

Email Address:

Vendor Solutions

White Papers


Research Centers: Applications | Application Development | Applications-Standards | Applications Vendor Solutions | Collaboration | CRM / ERP | Databases | Directories | Grid Computing | Java | Messaging | .Net | RFID | SOAP | Web Services | XML | Convergence & VoIP | Convergence Regulatory | Convergence Services | Convergence Standards | Convergence VoIP Vendor Solutions | Video | IP PBX | SIP | VoIP | VoIP Services | E-Business | DNS | RFID | Supply Chain | Web security LANs & Routers | Acceleration | Gigabit Ethernet | Lans-Standards | Routers | Wireless LANs | Network Management | Application Management | Desktop Management | Management Test Patch Management | Operating Systems | Linux | NetWare | Unix | Windows Outsourcing | Managed Services | Offshoring Security | Firewalls - VPN - Intrusion | Identity management | Patch Management | Microsoft Security | Privacy | Security Standards | Spam & Phishing | Viruses & worms | Web Security | Wireless Security | Servers & Desktop | Backup-Recovery | DataCenter | Desktops | Desktop Management | Grid | Servers | Server Blades | Servers Desktops | Utility Computing | Small & Medium Business | Broadband | Telework | Handhelds & PDAs | Home Networking | Security | Storage | Compliance | Infiniband | Network-Attached Storage | SANs | Storage Management | Storage Virtualization | Virtualization | Vendor News | Bankruptcy | Earnings | Lawsuits | Layoffs | Standards | Start Ups | Vendor Markets | Education | Financial | Healthcare | HIPAA | Manufacturing | Retail | Wide Area Network | Broadband | Carriers | Frame Relay | Metro Ethernet | MPLS | Service providers | Wireless services | Wireless & Mobile | Wireless LANs | PDAs & handhelds | Wireless Security | Wireless Services | Wireless Standards | Wireless Switches | All Company Profiles