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Understanding TCP/IP

You're reading from   Understanding TCP/IP A clear and comprehensive guide to TCP/IP protocols

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Product type Paperback
Published in May 2006
Publisher Packt
ISBN-13 9781904811718
Length
Edition 1st Edition
Concepts
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Author (1):
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CP Books a.s. CP Books a.s.
Author Profile Icon CP Books a.s.
CP Books a.s.
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Toc

Table of Contents (20) Chapters Close

Preface 1. Introduction to Network Protocols FREE CHAPTER 2. Network Monitoring Tools 3. Physical Layer 4. Link Layer 5. Internet Protocol 6. IP Address 7. Routing 8. IP Version 6 9. Transmission Control Protocol 10. User Datagram Protocol 11. Domain Name System 12. Telnet 13. File Transfer Protocol 14. Hypertext Transfer Protocol 15. Email 16. Forums 17. Lightweight Directory Access Protocol A. CISCO Routers Index

Chapter 16. Forums

Whereas an email message is delivered to a recipient’s mailbox, a news message is delivered to an NNTP server (news server) into a newsgroup (discussion forum or simply forum). A user must log in to the news server and must subscribe to some concrete newsgroup and work with news messages in the newsgroup.

News messages are in the newsgroups only for limited time. If the user is on holiday for a long duration, he or she might even miss some news contributions. In the case of email, the user would loose messages if the mailbox gets full.

Support from Operating Systems

While NNTP clients are mostly an integral part of mail clients (for example, Outlook Express), NNTP servers are usually not a part of installation sets of common operating systems. This is why the running of an NNTP server is not so easy, and it is usually the business of big ISPs.

Security

Securing news articles is not so common. It is possible to use the NNTP over SSL/TLS communication (in this...

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