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Changes for page Networks

Last modified by Zenna Elfen on 2026/01/05 21:51
From version 36.1
edited by Zenna Elfen
on 2026/01/05 19:52
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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2 2  (((
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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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16 +
17 +
18 +
19 19  == Building Blocks of P4P Networks ==
20 20  
21 21  
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23 23  (((
24 24  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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26 -{{box title="==== Contents ====
27 -
28 -====== ======"}}
29 -{{toc depth="5"/}}
30 -{{/box}}
31 31  )))
32 32  
33 33  
34 -
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43 -(((
44 -==== ====
45 -
46 46  ==== **1. Data Synchronization** ====
47 47  
48 48  > 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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90 90  * Examples: PKI, Distributed Identities (DIDs), Web-of-Trust, TOFU (SSH-style), Verifiable Credentials (VCs), Peer key fingerprints (libp2p PeerIDs), Key transparency logs
91 91  
92 92  
93 -
94 94  ==== **6. Transport Layer** ====
95 95  
96 96  > This layer provides logical connections and flow control. QUIC and WebRTC bring modern congestion control and encryption defaults; Interpeer explores transport beyond IP assumptions.
97 97  
98 -* //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?
99 99  * Examples: TCP, UDP, QUIC, SCTP, WebRTC DataChannels, Interpeer transport stack
100 100  
101 101  
102 -
103 103  ==== **7. Underlying Transport (Physical/Link Layer)** ====
104 104  
105 105  > Highly relevant for **offline-first / edge networks**, device-to-device communication, and mesh networks and relates to the hardware which facilitates connections.
106 106  
107 -* //How does data move across the medium?//
87 +* How does data move across the medium?
108 108  * Examples: Ethernet, Wi-Fi Direct / Wi-Fi Aware (post-AWDL), Bluetooth Mesh, LoRa, NFC, Cellular, CSMA/CA, TDMA, FHSS
109 109  
110 -
111 -
112 112  ==== **8. Session & Connection Management** ====
113 113  
114 114  > Manages **connection lifecycle**, including authentication handshakes, reconnection after drops, and session continuation—especially important in lossy or mobile networks.
115 115  
116 -* //How are connections initiated, authenticated, resumed, and kept alive?//
94 +* How are connections initiated, authenticated, resumed, and kept alive?
117 117  * Examples: TLS handshake semantics, Noise IK/XX patterns, session tokens, keep-alive heartbeats, reconnection strategies, session resumption tickets
118 118  
119 119  
120 -
121 121  ==== **9. Content Addressing** ====
122 122  
123 123  > Content addressing ensures **immutability, verifiability, and deduplication**. Identity of data = cryptographic hash, enabling offline-first and tamper-evident systems.
124 124  
125 -* //How is data addressed and verified by content, not location?//
102 +* How is data addressed and verified by content, not location?
126 126  * Examples: IPFS CIDs, BitTorrent infohashes, Git hashes, SHA-256 addressing, Named Data Networking (NDN)
127 127  
128 -
129 -
130 130  ==== **10. P2P Connectivity** ====
131 131  
132 -> Connectivity ensures peers bypass NATs/firewalls to reach each other. 
107 +> Connectivity ensures peers bypass NATs/firewalls to reach each other.
133 133  
134 -* //How can two peers connect directly across networks, firewalls, and NATs?//
109 +* How can two peers connect directly across networks, firewalls, and NATs?
135 135  * Examples: IPv6 direct, NAT Traversal, STUN, TURN, ICE (used in WebRTC), UDP hole punching, UPnP
136 136  
137 -
138 -
139 139  ==== **11. Session & Connection Management** ====
140 140  
141 141  > Manages **connection lifecycle**, including authentication handshakes, reconnection after drops, and session continuation.
142 142  
143 -* //How are connections initiated, authenticated, resumed, and kept alive?//
116 +* How are connections initiated, authenticated, resumed, and kept alive?
144 144  * Examples: TLS handshake semantics, Noise IK/XX patterns, session tokens, keep-alive heartbeats, reconnection strategies, session resumption tickets
145 145  
146 -
147 -
148 148  ==== **12. Message Format & Serialization** ====
149 149  
150 150  > Serialization ensures **portable data representation**, forward-compatible schemas, and efficient messaging. IPLD provides content-addressed structuring for P2P graph data.
151 151  
152 -* //How is data encoded, structured, and made interoperable between peers?//
123 +* How is data encoded, structured, and made interoperable between peers?
153 153  * Examples: CBOR, Protocol Buffers, Cap’n Proto, JSON, ASN.1, IPLD schemas, Flatbuffers
154 154  
155 -
156 -
157 157  ==== **13. File / Blob Synchronization** ====
158 158  
159 159  > 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.
160 160  
161 -//How are large objects transferred and deduplicated efficiently across peers?//
130 +How are large objects transferred and deduplicated efficiently across peers?
162 162  Examples: BitTorrent chunking, IPFS block-store, NDN segments, rsync-style delta sync, ZFS send-receive, streaming blob transfers
163 163  
164 -
165 165  ==== **14. Local Storage & Processing Primitives** ====
166 166  
167 167  > Provides durable on-device state and local computation (event sourcing, materialization, compaction). Enables offline-first writes and deterministic replay.
168 168  
169 -* //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?
170 170  * Examples: RocksDB, LevelDB, SQLite, LMDB, local WALs/append-only logs, embedded stream processors (NATS Core JetStream mode, Actyx-like edge runtimes), Kafka-like libraries
171 171  
172 172  
173 -
174 174  ==== **15. Crash Resilience & Abortability** ====
175 175  
176 176  > 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.
177 177  
178 -* //How do nodes recover and maintain correctness under failure?//
145 +* How do nodes recover and maintain correctness under failure?
179 179  * Examples: WALs, idempotent ops, partial log replay, transactional journaling, write fences
180 180  
181 181  
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186 186  
187 187  [[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"]]
188 188  
189 -== ==
190 190  
157 +
191 191  == Overview of P4P Networks ==
192 192  
193 193  {{include reference="Projects.WebHome"/}}
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