1.6. Describe the impact of applications (Voice over IP and Video over IP) on a network

The main purpose of the Host-to-Host layer is to shield the upper-layer applications from the complexities of the network. This layer says to the upper layer, "Just give me your data stream, with any instructions, and I'll begin the process of getting your information ready to send."

The following sections describe the two protocols at this layer:

  • Transmission Control Protocol (TCP)

  • User Datagram Protocol (UDP)

By understanding how TCP and UDP work, you can interpret the impact of applications on networks when using Voice and Video Over IP.

1.6.1. Transmission Control Protocol (TCP)

Transmission Control Protocol (TCP) takes large blocks of information from ...

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