| URL | Uniform Resource Locator | |
| TCP | Tranmission Control Protocol One of the main Internet Protocols | |
| UDP | User Datagram Protocol One of the main Internet Protocols | |
| DHCP | Dynamic Host Configuration Protocol Used to assign IP addresses | Server UDP 67 Client UDP 68 |
| DNS | Domain Name Server | UDP 53 TCP 53? |
| HTTP | Hyper-Text Transfer Protocol | UDP 80 & 8080 TCP 80 & 8080 |
| HTTPS | Hyper-Text Transfer Protocol Secure | UDP 443 & 8443 TCP 443 & 8443 |
| HTTPS/3 | Hyper-Text Transfer Protocol Secure version 3 Uses only UDP for speed - QUIC | UDP 443 & 8443 |
| NTP | Network Time Protocol Raspberry Pi does not have realtime clock | Server UDP 123 Client UDP 1023 |
| ICMP | Internet Control Message Protocol Diagnose network communications issues - ping, trace and others | None |
| mDNS | Multicast Domain Name Server | UDP 5353 |
| ARP | Address Resolution Protocol Converts IP addresses to MAC addresses | UDP 219 TCP 219 |
| DHCPv6 | Dynamic Host Configuration Protocol Used to assign IP addresses | Server UDP 547 Client UDP 546 |
| * | Ephemeral Ports (used by the client) | Linux: 32768-61000 Windows: 1025-65535 MacOS: 49152-65535 |
| SSL | Secure Socket Layer | |
| TLS | Transport Layer Security | |
| QUIC | Quic(k) https/3 | udp |
© Copyright Dr. Ray Franco, PhD, PE | 2006-2022. All rights reserved.
