 1 Mbit/s to 10 Gbit/s, and the trend is to continue increasing the speed due to its cost benefit. With such evidence, the only questions are how quickly 10G Ethernet will be adopted and to what extent it will displace alternative technologies. Early adoption of 10Gb Ethernet is happening where there is a critical need for additional bandwidth. IP over DWDM Data packet transmissions using the Internet Protocol (IP) are becoming the most practical transmission method used in data networks. The reason is the ability to transmit information Resources through a channel, optimizing the channel's resources to the maximum. In other words, because of the frame format of IP, a channel can be used by many users simultaneously and without discontinuities in the transmission. On the other hand, advances in lasers and fiber optic devices permit very high speeds (on the order of THz) in the network. Dense Wave- length Division Multiplexing (DWDM) is the process of multiplexing signals of different wavelength onto a single fiber. IP over DWDM is the concept of sending data packets over an optical layer using DWDM for its capacity and other operations. This creates a vision of an all-optical network where all management is carried out in the photonic layer. The optical network is proposed to provide end-to-end services completely in the optical domain, without having to convert the signal to the electrical domain during transit. In addition, employing IP over DWDM saves the use of SDH equipment and multiplexing. In this case, Generalized Multiprotocol Label Switching (GMPLS), which is a derivation of Multiprotocol Label Switching (MPLS), forms the basis for a control plane for all-optical networks (for details of MPLS, see Chapter 13). Multimedia Applications A video codec is a type of codec that compresses or decompresses a video signal. This com- pression can be carried out via a device or software. The type of compression will depend on the application. For example, if the application is audio, video, or images, the compres- 