There are many protocols used in computer networking, some of the most common include:

• TCP (Transmission Control Protocol): A reliable, stream-oriented protocol that establishes a virtual connection between two computers and ensures that data is transmitted accurately and completely.
• IP (Internet Protocol): A routing protocol that is responsible for routing packets between networks and hosts.
• HTTP (Hypertext Transfer Protocol): A protocol used for transmitting data over the internet, typically used for web pages and other documents.
• FTP (File Transfer Protocol): A protocol used for transferring files between computers on a network.
• DNS (Domain Name System): A system used to translate human-friendly domain names (e.g., www.google.com) into IP addresses.
• DHCP (Dynamic Host Configuration Protocol): A protocol used to automatically assign IP addresses to devices on a network.
• SMTP (Simple Mail Transfer Protocol): A protocol used for sending and receiving email.
• SSH (Secure Shell): A secure protocol used for remotely accessing and managing devices on a network.
• VPN (Virtual Private Network): A protocol used to create a secure, encrypted connection between two devices, typically used to connect remote workers to a company's network.
• IPv6 is the new version of IP that is designed to replace IPv4, it has a larger address space, more efficient routing, and improved security features.