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# Category:Protocols

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See also Wikipedia:Communication protocol and Category:Servers.

Name | Default ports | Links
--- | --- | ---
BitTorrent (BT) | 6881-6889 | category, clients
Domain Name System (DNS) | 53 | category, resolvers
Dynamic Host Configuration Protocol (DHCP) | 67, 68 | category, clients
Extensible Messaging and Presence Protocol (XMPP) | 5222, 5269 | category, clients, servers
File Transfer Protocol (FTP) | 20, 21 | category, clients, servers
Gopher | 70 |
Gemini | 1965 |
Hypertext Transfer Protocol (HTTP) | 80, 443 | category, clients, servers
Internet Relay Chat (IRC) | 6667,6697 | category, clients, servers
Network Time Protocol (NTP) | 123 | category, implementations
Secure Shell (SSH) | 22 | category, implementations
Simple Mail Transfer Protocol (SMTP) | 25 | category, clients, servers
Transport Layer Security (TLS) | – | category, implementations

## HTTP-based protocols

- ACME
- WebDAV

## Subcategories

This category has the following 10 subcategories, out of 10 total.

### B

- BitTorrent

### D

- DHCP
- Domain Name System

### F

- File Transfer Protocol

### I

- Internet Relay Chat

### N

- Network Time Protocol

### S

- Secure Shell

### T

- Transport Layer Security

### W

- WebDAV

### X

- XMPP

## Pages in category "Protocols"

The following 8 pages are in this category, out of 8 total.

### A

- ACME

### G

- Gemini
- Git protocol
- Gopher

### H

- HTTP

### O

- OCSP

### S

- SMTP

### T

- TFTP

Category:

- Networking

Category:Protocols
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