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Changes for page Networks

Last modified by Zenna Elfen on 2026/01/05 21:51
From version 46.1
edited by Zenna Elfen
on 2026/01/05 20:05
Change comment: There is no comment for this version
To version 15.1
edited by Zenna Elfen
on 2025/11/24 11:56
Change comment: There is no comment for this version

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5 -= Peer-for-Peer Networks =
3 +This page contains an overview of all P4P Networks in this wiki and their building blocks.
6 6  
7 -P4P, short for Peer-4-Peer (which in turn is short for Peer-for-Peer) are a family of networks which build on principles of local-first, peer-2-peer, open-source, routing agnostic (offline-first) and mutual-aid principles. The above is a lot of terms which in and of themselves carry a lot of meaning, yet when combined they enable censorship-resistant, resilient and adaptive, sustainable and energy-efficient communication infrastructures.
5 +You can also [[add a P4P Network>>doc:Projects.WebHome]] or have a look at the [[P4P Applications>>doc:P4P.Applications.WebHome]].
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20 20  
21 21  
19 +== Building Blocks of P4P Networks ==
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28 -== Building Blocks of P4P Networks ==
29 -
30 30  To fully assemble a P4P network one needs a few different building blocks, below is an overview of 15 of those building blocks. Lost in translation? Take a look at the [[terminology>>doc:P4P.Definitions.WebHome]].
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38 -
39 39  ==== **1. Data Synchronization** ====
40 40  
41 41  > Synchronization answers **how updates flow between peers** and how they determine what data to exchange. This layer is about **diffing, reconciliation, order, causality tracking, and efficient exchange**, not persistence or user-facing collaboration semantics.
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83 83  * Examples: PKI, Distributed Identities (DIDs), Web-of-Trust, TOFU (SSH-style), Verifiable Credentials (VCs), Peer key fingerprints (libp2p PeerIDs), Key transparency logs
84 84  
85 85  
86 -
87 87  ==== **6. Transport Layer** ====
88 88  
89 89  > This layer provides logical connections and flow control. QUIC and WebRTC bring modern congestion control and encryption defaults; Interpeer explores transport beyond IP assumptions.
90 90  
91 -* //How do peers establish end-to-end byte streams and reliable delivery?//
79 +* How do peers establish end-to-end byte streams and reliable delivery?
92 92  * Examples: TCP, UDP, QUIC, SCTP, WebRTC DataChannels, Interpeer transport stack
93 93  
94 94  
95 -
96 96  ==== **7. Underlying Transport (Physical/Link Layer)** ====
97 97  
98 98  > Highly relevant for **offline-first / edge networks**, device-to-device communication, and mesh networks and relates to the hardware which facilitates connections.
99 99  
100 -* //How does data move across the medium?//
87 +* How does data move across the medium?
101 101  * Examples: Ethernet, Wi-Fi Direct / Wi-Fi Aware (post-AWDL), Bluetooth Mesh, LoRa, NFC, Cellular, CSMA/CA, TDMA, FHSS
102 102  
103 -
104 -
105 105  ==== **8. Session & Connection Management** ====
106 106  
107 107  > Manages **connection lifecycle**, including authentication handshakes, reconnection after drops, and session continuation—especially important in lossy or mobile networks.
108 108  
109 -* //How are connections initiated, authenticated, resumed, and kept alive?//
94 +* How are connections initiated, authenticated, resumed, and kept alive?
110 110  * Examples: TLS handshake semantics, Noise IK/XX patterns, session tokens, keep-alive heartbeats, reconnection strategies, session resumption tickets
111 111  
112 112  
113 -
114 114  ==== **9. Content Addressing** ====
115 115  
116 116  > Content addressing ensures **immutability, verifiability, and deduplication**. Identity of data = cryptographic hash, enabling offline-first and tamper-evident systems.
117 117  
118 -* //How is data addressed and verified by content, not location?//
102 +* How is data addressed and verified by content, not location?
119 119  * Examples: IPFS CIDs, BitTorrent infohashes, Git hashes, SHA-256 addressing, Named Data Networking (NDN)
120 120  
121 -
122 -
123 123  ==== **10. P2P Connectivity** ====
124 124  
125 -> Connectivity ensures peers bypass NATs/firewalls to reach each other. 
107 +> Connectivity ensures peers bypass NATs/firewalls to reach each other.
126 126  
127 -* //How can two peers connect directly across networks, firewalls, and NATs?//
109 +* How can two peers connect directly across networks, firewalls, and NATs?
128 128  * Examples: IPv6 direct, NAT Traversal, STUN, TURN, ICE (used in WebRTC), UDP hole punching, UPnP
129 129  
130 -
131 -
132 132  ==== **11. Session & Connection Management** ====
133 133  
134 134  > Manages **connection lifecycle**, including authentication handshakes, reconnection after drops, and session continuation.
135 135  
136 -* //How are connections initiated, authenticated, resumed, and kept alive?//
116 +* How are connections initiated, authenticated, resumed, and kept alive?
137 137  * Examples: TLS handshake semantics, Noise IK/XX patterns, session tokens, keep-alive heartbeats, reconnection strategies, session resumption tickets
138 138  
139 -
140 -
141 141  ==== **12. Message Format & Serialization** ====
142 142  
143 143  > Serialization ensures **portable data representation**, forward-compatible schemas, and efficient messaging. IPLD provides content-addressed structuring for P2P graph data.
144 144  
145 -* //How is data encoded, structured, and made interoperable between peers?//
123 +* How is data encoded, structured, and made interoperable between peers?
146 146  * Examples: CBOR, Protocol Buffers, Cap’n Proto, JSON, ASN.1, IPLD schemas, Flatbuffers
147 147  
148 -
149 -
150 150  ==== **13. File / Blob Synchronization** ====
151 151  
152 152  > Bulk data syncing has **different trade-offs** than small collaborative state (chunking, deduplication, partial transfer, resume logic). Critical for media and archival P2P use-cases.
153 153  
154 -//How are large objects transferred and deduplicated efficiently across peers?//
130 +How are large objects transferred and deduplicated efficiently across peers?
155 155  Examples: BitTorrent chunking, IPFS block-store, NDN segments, rsync-style delta sync, ZFS send-receive, streaming blob transfers
156 156  
157 -
158 158  ==== **14. Local Storage & Processing Primitives** ====
159 159  
160 160  > Provides durable on-device state and local computation (event sourcing, materialization, compaction). Enables offline-first writes and deterministic replay.
161 161  
162 -* //How do nodes persist, index, and process data locally—without external servers?//
137 +* How do nodes persist, index, and process data locally—without external servers?
163 163  * Examples: RocksDB, LevelDB, SQLite, LMDB, local WALs/append-only logs, embedded stream processors (NATS Core JetStream mode, Actyx-like edge runtimes), Kafka-like libraries
164 164  
165 165  
166 -
167 167  ==== **15. Crash Resilience & Abortability** ====
168 168  
169 169  > Ensures P2P apps don’t corrupt state on crashes. Tied to **local storage & stream-processing**, and critical in offline-first and distributed update pipelines. Abortability is the updated term for Atomicity as part of the ACID abbreviation.
170 170  
171 -* //How do nodes recover and maintain correctness under failure?//
145 +* How do nodes recover and maintain correctness under failure?
172 172  * Examples: WALs, idempotent ops, partial log replay, transactional journaling, write fences
173 173  
174 174  
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180 180  [[Flowchart depicting distributed network variants, under development. Building on work from Z. Elfen, 2024: ~[~[https:~~~~/~~~~/doi.org/10.17613/naj7d-6g984~>~>https://doi.org/10.17613/naj7d-6g984~]~]>>image:P4P_Typology.png||alt="Flowchart depicting typologies of distributed networks, such as Friend-2-Friend, Grassroots Networks, Federated Networks, Local-First, P2P and P4P Networks" data-xwiki-image-style-alignment="center" height="649" width="639"]]
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187 -{{box title=" **Contents**"}}
188 -{{toc depth="5"/}}
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191 -
192 -
193 -
194 194  == Overview of P4P Networks ==
195 195  
196 196  {{include reference="Projects.WebHome"/}}
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