ipv4/ipv6, hip, e.164, uri/urn/url, doi overviews sep. 7. 2005 seungjae lee [email protected]
TRANSCRIPT
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Contents
IPv4/IPv6 HIP E.164 URI/URN/URL DOI
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IPv4
The current Internet Protocol address e.g. 147.46.125.125 RFC 791 (1981) 32bit address:
4,294,967,296interfaces maximum
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The address shortage problem 232 addresses is too few Solution
CIDRTighter control on the allocation of
addressesNetwork renumberingDHCPNAT IPv6 (!)
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IPv6
RFC 2460 (1998) 128bit address space : 2128 = 3.4*1038
e.g. 21DA:00D3:0000:2F3B:00AA:00FF:FE28:9C5A
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IPv6 features
Larger address space Flexible header format Auto-configuration Support for resource allocation Security Mobility
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IPv6 deployments
The Internet is still mostly IPv4 Transitional mechanisms
e.g. dual stack, encapsulation
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Contents
IPv4/IPv6 HIP E.164 URI/URN/URL DOI
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The Need for HIP
Dual functionalities of current IP addressTopological locatorNetwork interface identity
Limited flexibilityE.g. IP address renumbering, mobility,
multi-homing
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HIP: Host Identity Protocol
Introduce Host Identity (HI) namespaceDecouples the name and locator rolesPublic key system
New HI layerTranslates
Host ID intoIP addressand vice versa
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Pros and Cons of HIP
ProsSolves mobility and multi-homing
problemSecurity
ConsThe IP stack must be modified
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Mobility support of HIP
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Multi-homing support of HIP
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Contents
IPv4/IPv6 HIP E.164 URI/URN/URL DOI
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E.164
E.164 provides the number structure and functionality for the following three categories ofInternational Public Telecommunication numbers.
Geographical Global Networks
areas services
+800+82
ITU-T:ITU Telecommunication Standardization Sectorhttp://www.itu.int/ITU-T/
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E.164 Number for Geographical areas
1-3 digits(M)
N digits Max (15-M-N) digits
CC NDC SN
National (significant) number
E.164 Number for geographical areas
CC : Country CodeNDC : National Destination CodeSN : Subscriber Number
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E.164 and the Internet
Internet phoneVoIP, Interworking Gateway
E.164 in IPv6 address space (Patent:KT) ENUM
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Contents
IPv4/IPv6 HIP E.164 URI/URN/URL DOI
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URI/URL/URN
Term Definition
URI
• Unique identifier for online resources
- Location- Identity
URL • Locator of online resources
URN • Unique identifier of online resources
URC • Metadata for information
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URL and URN
URL : Uniform Resource Locator“My copy of the book is on the lightstand in my
bedroom.”scheme://authority/path?query
URN : Uniform Resource Name“I read a neat book;
it’s called Pragmatic Programmer.”
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URN Syntax
urn:nid:nssnid = Namespace Idnss = Namespace Specific String
Examplesurn:ietf:rfc:3187urn:isbn:0451450523
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URN Resolution
URN Converter
Web Server
URN
URC
URL
resource content
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URN Properties
Global scope Global uniqueness Persistence Scalability Legacy support Extensibility Independence
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Contents
IPv4/IPv6 HIP E.164 URI/URN/URL DOI
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DOI
Digital Object IdentifierName for an entity on digital networks
doi:naming_authority/identifier Almost the same role with the URN
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DOI and URN
DOI Managed by International DOI Foundation
(IDF)Fulfills all the functional requirements of
URN, but not registered as a formal URN Internet draft : A spec for DOI as a URI
URN IETF Standard: RFCUniversal Contents Identifier (UCI):
based on URN, 2003 NCA(한국전산원 )
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End of Presentation
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