EXERCISE 12.01.E XERCISE 12.03R EQUESTING A C ERTIFICATE FROM A W EB S...

3. Your newest hire has been assigned the task of configuring a Windows Server 2003 com-puter as a router and has asked you how to determine if a machine address or an IPaddress is being used at the router.You explain that routers use IP addresses, while bridgesand hubs use machine addresses.You continue to explain that the OSI reference model hasseven layers and that IP, or the Internet Protocol, operates at what layer?A. The Physical layerB. The Data Link layerC. The Network layerD. The Transport layerC.The Network layer implements protocols that can transport data across a LAN seg-ment.These protocols are known as routable protocols because their data can be for-warded by routers past the local network. IP is the dominant routable protocol. IP, andother Layer 3 protocols, are considered asynchronous because they send the data withno attempt to verify that the data arrived at its destination.A, B, C. Answer Ais incorrect because the Physical layer of the OSI reference model isresponsible for the transmission of data.This layer operates only with ones and zeros.Answer B is incorrect because the Data Link layer is responsible for providing end-to-endvalidity of the data being transmitted. Answer D is incorrect because the Transport layer isalso responsible for the end-to-end integrity of data transmissions. An example of a pro-tocol used at the Transport layer is TCP.TCP and other Layer 4 protocols are consideredsynchronous because they verify the successful arrival of the data at its destination.