● OSI is a theoretical model that shows how any two different systems can communicate with each other.Router, as a networking device, operate at the (71) layer of the OSI model.(71)A.transport B.application C.network D.physical
● Most of the host operating system provides a way for a system administrator to manually configure the IP information needed by a host.Automated configuration methods, such as (72) , are required to solve the problem.(72)A.IPsec B.DHCP C.PPTP D.SOAP