Host-to-Host Communication Model Layer OSI

7 Application layer functions as the interface with the applications with network functionality, manage how applications can access the network, and then make an error message. Protocols that are in this layer is the HTTP, FTP, SMTP, and NFS.

6 Presentation Layer Functions to translate the data to be transmitted by the application into a format that can be transmitted through the network. Protocols that are in this level is redirektor software (Redirector software), such as the Workstation service (in Windows NT) and Network shell (like Virtual Network Computing (VNC) or Remote Desktop Protocol (RDP)).

5 Session Layer Functions to define how connections can be created, maintained, or destroyed.In addition, at this level of name resolution is also performed.

4 Transport Layer function to divide data into packets and provides sequence numbers to packets that can be rearranged on the purpose of receipt. In addition, at this level also makes a sign that the packet is received successfully (Acknowledge), and re terhadp transmit packets that are lost in the middle of the road.

3 Network layer function to define the IP addresses, create a header for the packets, and then make internetworking routing through the router and using layer-3 switches.

2 data-link layer Befungsi to determine how the data bits are grouped into a format called a frame. In addition, this occurs at the level error correction, flow control, addressing hardware (such as Media Access Control Address (MAC Address)), and determine how the network devices such as hubs, bridges, repeaters, and Layer 2 switches operate. IEEE 802, divide this level into two levels, that is, layers of Logical Link Control (LLC) and Media Access Control layer (MAC).

1 Physical layer function to define the network transmission media, signaling methods, synchronization bits, network architecture (such as Ethernet or Token Ring), network topology and pengabelan. In addition, this level also defines how the Network Interface Card (NIC) can interact with the cable or radio media.