ccna 200 301 booksmart review washington

ccna 200 301 booksmart review washington.Figure 3.10 RJ45UTP Cable Problem #1In order for Host A to ping through to Host B, you need to connect the two switches together using crossover cables. Which type of cable should you use for the network shown in Figure 3.11?A variety of cables are used in Figure 3.11. For the connections between the switches, it is clear that we should use the crossover cable shown in Figure 3.7. The Console connection used is the reversed cable. The connection between the router and the switch uses a straight-through cable, and the host uses a straight-through cable between the host and the switch. Remember that if you need to use a serial connection (not shown in this example) to connect to the WAN, you will need to use a V.35 cable.Figure 3.11 RJ45 UTP Cable Issue #23.3 Data EncapsulationWhen a host traverses the network to send data to another device, the data goes through a peering process: each layer in the OSI model wraps the protocol information for that layer around the periphery of the data. The information at each layer will only communicate with the peer layer in the receiver's device.To communicate as well as interact with the information, each layer uses PDUs (Protocol Data Units). The PDU maintains the control information added to the data by each layer in the OSI model. Typically this information is added to the front of the data field as a header, but can also be added to the back of the data as a tail.The PDUs added to the data periphery are encapsulated by each layer of the OSI model and have different names for the different layers depending on the information provided in each header. The information for each layer of PDUs created by the sender device is only readable by the corresponding layer on the receiver device. Once read, the layer strips this information and hands the data over to the previous layer for processing.Figure 3.12 illustrates the different layers of PDUs and depicts how each layer adds control information to the data. This diagram nicely illustrates how the upper layer user data is transformed before it is transmitted to the network. The data stream is then handed off to the transport layer, where the protocol at this layer establishes a virtual circuit connection with the receiver device by sending a synchronization packet. The data stream is then split into smaller pieces, with a transport layer packet header added to each piece of data, at which point each piece of data is called a segment (a PDU).TCP header