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Question
In linux, in cidr notation for IP addresses: 192.168.1.0/26, describe what the /26 means?
Answer

It means that the first 26 bits of the IP are for the networking/LAN and the remaining 6 are for the hosts. So there can be 2^6=64 IPs in total in the LAN.

^^ CIDR stands for Classless Inter-Domain Routing

^^^ remember that each IP v4 address is 32 bits (8bits * 4 dot seperated decimal numbers: 192.168.1.255). So if first 26 bits are to identify the LAN, that leaves 32-26=6 bits for the host IPs in the LAN.


Question
In linux, in cidr notation for IP addresses: 192.168.1.0/26, describe what the /26 means?
Answer
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Question
In linux, in cidr notation for IP addresses: 192.168.1.0/26, describe what the /26 means?
Answer

It means that the first 26 bits of the IP are for the networking/LAN and the remaining 6 are for the hosts. So there can be 2^6=64 IPs in total in the LAN.

^^ CIDR stands for Classless Inter-Domain Routing

^^^ remember that each IP v4 address is 32 bits (8bits * 4 dot seperated decimal numbers: 192.168.1.255). So if first 26 bits are to identify the LAN, that leaves 32-26=6 bits for the host IPs in the LAN.

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25. Introduction to IP
ial line), as shown in Figure 25.3. Figure 25.3: Two remotely connected networks This arrangement can be summarized by five machines X, A, B, C, and D. Machines X, A, and B form LAN 1 on subnet <span>192.168.1.0/26 . Machines C and D form LAN 2 on subnet 192.168.1.128/26 . Note how we use the `` /26 '' to indicate that only the first 26 bits are network address bits, while the remaining 6 bits are host address bits. This means that we can have at most IP addresses on each of LAN 1 and 2. Our dedicated serial link comes between machines B and C. Machine X has IP address 192.168.1.1 . This machine is

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