ccna 200-301 network simulator tools internet explorer

ccna 200-301 network simulator tools internet explorer.A 10.0.0.0.10.255.255.255B 172.16.0.0.172.31.255.255C 192.168.0.0.192.168.255.2552.5.5 IP Subnetting***Before we talk about subnetting, let's take a look at an example, as shown in Figure 2-5-2, where 4 computers are connected to a HUB (hub) with IP and subnet mask configuration as shown in the figure. The "/24" in the figure indicates that the network bits of the computer IP address have 24 bits and the host bits are 8 bits (32.24=8, which is equivalent to a subnet mask of 255.255.255.0, a format often used in CCNA exam questions to represent subnet masks). Which computers in the diagram can communicate with each other? What is the basis for the determination? How can you make all of them inter-accessible?The answer is that PCI (Personal Computer) and PC3 are in a group, and PC2 and PC4 are in a group, and the computers within the group can communicate with each other, but the computers between the group cannot communicate with each other. The judgment is based on the fact that computers in the same subnet can communicate directly, and computers in different subnets cannot communicate directly. If computers in different subnets need to communicate with each other, they need to pass through a Layer 3 device, that is, a device with routing function. The hub has already been introduced in the physical layer, does not have the function of the network layer, can not achieve the interconnection between different networks.So how can you tell if you are on the same subnet? First, the IP address and subnet mask into a binary number, and then "with" operation, that is, the binary number by bit to take the small operation, to get out a computer is located in the network number, if two40,Bé A_PAR? I juggle with a straight-If the network numbers of the computers are the same, it means they are in the same subnet; if the network numbers are different, it means they are in different subnets. IP address of each computer and subnet mask by bit "and" operation, we get PC1 network number is 192.168.1.0/24, PC2 network number is 192.168.2.0/24, PC3 network number is 192.168.1.0/24, PC4 network number is 192.168.2.0/24 is 192.168.2.0/24, PC1 and PC3 are on the same subnet, and PC2 and PC4 are on the same subnet. If a computer in 192.168.1.0 network needs to access a computer in 192.168.2.0 network, it needs to pass through a Layer 3 device, and the HUB is in the first layer of the OSI seven-layer model, i.e., the physical layer, which does not have routing function and cannot provide routing function for the computers in different subnets.