ccna 200 301 bookshare student login

ccna 200 301 bookshare student login.7.1 NX-OS HardwareTwo of the hottest capabilities in data center network interconnect technology are speed and reliability, and Nexus' hardware provides fault tolerance mechanisms along with high throughput and low latency applications. Nexus hardware can manage high-speed 10., 40. or 100-Gbit/s interfaces - providing a very substantial bandwidth capacity! Let's recall a little that the rate of the first class of mainstream Ethernet interfaces is 10 Mbit/s, and it takes 10 000 such interfaces to provide the rate offered by a 100 Gbit/s interface. The NX.OS is designed to incorporate a variety of modern networking features used in today's data center environments, and we will focus on the differences between it and traditional Cisco switches.Incidentally, the Cisco Data Center CCNA exam only considers Nexus components and theory, not the different models of Nexus, so we will largely ignore those as well.7.1.1 SFP+ TransceiversWhen I first took the tiny SFP+ transceiver out of the box, I was surprised to find that the port looked like a tiny empty box. There's certainly a reason for this. By default, it doesn't offer a copper connection or a fiber connection, but rather a variety of options for the device. This both important and logical feature allows us (the end users of SFP+ transceivers) to choose for ourselves the type of media we wish to use on the Nexus device platform.Figure 7.1 and Figure 7.2 show two different SFP+ transceivers, one for copper and the other for fiber.7.1 NX-O S HardwareI will further choose to use fiber optics, which can be implemented for long or short distance Ethernet connections depending on the type of SFP+ I choose. In order for the two ends to be connected together, I will need to select an SFP+ transceiver and a fiber optic cable for each end. In addition, the SFP+ transceiver defines the rate of the connection, such as 1Gbit/s or 10Gbit/soFigure 7.1 SFP+ Copper Ethernet Figure 7.2 SFP+ Fiber Ethernet In order to implement short distance connections in a data center environment, I typically choose to use copper cable with SFP transceivers as shown in Figure 7.3. This unified cable is called TwinAx (shielded twin wire feeder) and it is a cheap and reliable cable! The biggest problem with it is its limited length.Figure 7.3 SFP+ and Copper Cable (TwinAx)