IP is a layer 3 (network layer) protocol used for routing
network layer
The Network Layer in the TCP/IP model is responsible for routing data packets between different networks. It determines the best path for data to travel from the source to the destination through various interconnected networks. The Internet Protocol (IP) is the main protocol used at this layer to address and forward packets.
The network layer is the layer that is responsible for routing packets on the network. This is the layer in which Internet protocol operates. In the seven layer OSI model, the network layer is the third layer from the bottom.
DNS is an application layer protocol. The application layer of the OSI model is the layer closest to the user and provides network services to the applications of the user. Examples of protocols that operate at the application layer are: DNS, FTP, TFTP, SNMP, TELNET, RLOGIN, SMTP, MIME, NFS, FINGER, BOOTP and SMB.
TCP, the Transmission Control Protocol, is a layer-4 protocol (in the 7-layer OSI model).
FTP (File Transfer Protocol) is an application layer, or Layer 7, protocol.
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Ethernet is a data link layer protocol - layer 2
The network layer is the third level of the Open Systems Interconnection or the OSI model. The protocols that are implemented at this layer which carry user data include: Internet Protocol version 4 (IPv4), Internet Protocol version 6 (IPv6) and Novell Internetwork Packet Exchange (IPX).
tcp is the transport control protocol and ip is the internet protocol. tcp is concerned with guaranteed delivery of packets from source to destination, while ip is the protocol used to actually deliver packets. tcp is located at layer 4 of the osi model, or the transport layer. ip is located at layer 3 of the osi model, or the network layer. check out the video tutorials in the link below.
Network Layer
Network
ports protocol