Presently all your pcs are on the same collision domain so the see each other just fine and ipv4 trickery is not going to separate them. The reason your scan tool sees everything is how the software works by incrementing the address by one then asking for an echo response at that address and the fact that the subnet mask your are using is also a broadcast address. Table A lists all the available Class A subnet masks: Table A Mask Prefix Subnets Hosts 255.0.0.0 (/8) 1 network with 16,777,214 hosts 255.128.0.0 (/9) 2. The computer would need to run some software like linux as a firewall/proxy/router and define all ports to different subnets like 192.168.1.0/31 192.168.2.0/31 <- this /31 means 255.255.255.254 which allows exactly two hosts. A poorman's version would be n+1 ethernet ports in a computer acting as a router and network switch where "n" is the number of pcs and the "+1" is the port going out to the internet. The VLAN will virtualize the collision domain and thus VLAN2 does not see VLAN3 unless defined in a layer3 router connecting both VLAN2 and VLAN3. Second, you need to remember the following: 256-19264. However you would still need layer3 routing abilities to talk between VLANs. Memorize the number of bits used with each mask that are shown in Table A. This would require hardware capable of layer2 switching and VLAN support at least. This table shows common network masks and their. Why Look at the right-hand side of each table. When you use slash notation, you write the IP address, a forward slash (/), and the subnet mask number. As you go down the table, the number of subnets increases and the number of hosts in each subnet then decreases. Look at the tables for just a minute and notice what happens. Pembahasan kali ini adalah tentang Tabel Subnet Mask Untuk Kelas A, B, dan C. What you are asking for is VLANs or PVLANs (virtual or private lans). These subnet mask tables can make it easier for you to determine which subnet mask to use for any given situation. These masks are used on routers and end devices to indicate where the split is, so the network portion of. Thus subnet masks are always a series of 1s followed by a series of 0s. 255.255.255.255 is a broadcast address same as 0.0.0.0 if you want two endpoints the subnet mask would be 255.255.255.254 (however this still won't do what you are asking. A subnet mask is a 32 bit binary number where a binary 1 indicates a network bit and a binary 0 represents a host bit in the corresponding IP address.
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