What internet is made of
A global network of networks joined by the TCP/IP protocols.
- Computer — has part. The Internet links billions of computers.
- Router — has part. A network of routers.
- Optical fibre — has part. The backbones are optical fibre.
- TCP/IP — uses. Networks are joined by the TCP/IP protocols.
- Packet switching — uses. Data is sent in packets.
- Public-key cryptography — uses. HTTPS is protected by asymmetric encryption.
- Silica (sand) — is made of. The backbones are silica optical fibre.
- Copper — is made of. The last mile is copper.