54 Cloud ComPuting networking
2.5 Network Interface Layer Protocols
Protocols in the network interface layer are implemented by combining the hardware
and software. In some of the textbooks, the network interface layer is broken into two
layers. One is the network interface layer, which contains protocols that are used to
form frames. e other layer is the physical layer, which includes the network hardware.
Here, for convenience, the hardware and the protocols are all combined into a single
network interface layer. ere are more than a dozen protocols and network technolo-
gies included in this layer. e commonly used protocols and network technologies
in the network interface layer are Point-to-Point Tunneling Protocol (PPTP), Layer
2 Tun ...