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REDES - Coggle Diagram

- - - - Network administration can group devices and services into subnets are determinated by:
        
        Location, such as floors in a building (Figure 1).
        
        Organizational unit (Figure 2).
        
        Device type (Figure 3).
        
        Any other division that makes sense for the network.
- - - - This is done by extending the subnet mask to borrow some of the bits from the host portion of the address to create additional network bits.
        
        Networks are most easily subnetted at the octet boundary of /8, /16, and /24.
- - - - /27 row – Borrowing 3 bits creates 8 subnets supporting 30 hosts each.
        
        /30 row – Borrowing 6 bits creates 64 subnets supporting 2 hosts each.
- - - - Although a complete memorization of the table is not required, it is suggested that you gain a good understanding of how each value in the table is generated.
  - - - When borrowing bits from a /16 address, start borrowing bits in the third octet, going from left to right. Borrow a single bit at a time until the number of bits necessary to create 100 subnets is reached.
        
        displays the number of subnets that can be created when borrowing bits from the third octet and the fourth octet. Notice there is now up to 14 host bits that can be borrowed.
        
        To satisfy the requirements of the enterprise, 7 bits (i.e., 2^7 = 128 subnets) would need to be borrowed, as shown in Figure 2.
- - - - Apply the host calculation formula as shown in Figure 1. There are only 510 host addresses that are available for each /23 subnet.
        
        As shown in Figure 2, the first host address for the first subnet is 172.16.0.1, and the last host address is 172.16.1.254.
- - - - Engineering department in one network, and all host devices used by management in a separate network.
        
        Recall the number of subnets created when bits are borrowed can be calculated using the formula 2^n (where n is the number of bits borrowed).
- - - - VLSM allows a network space to be divided into unequal parts. With VLSM, the subnet mask will vary depending on how many bits have been borrowed for a particular subnet, thus the “variable” part of the VLSM.
        
        VLSM subnetting is similar to traditional subnetting in that bits are borrowed to create subnets. The formulas to calculate the number of hosts per subnet and the number of subnets created still apply.
- - - - This means looking at the entire network and determining the main sections of the network and how they will be segmented.
        
        The size of the subnet involves planning the number of hosts that will require IPv4 host addresses in each subnet of the subdivided private network.
- - - - IPv6 subnetting is also easier to implement than IPv4, because there is no conversion to binary required. To determine the next available subnet, just count up in hexadecimal.
    - - This would allow the organization to create /64 subnets, as shown in the figure. Notice how the global routing prefix is the same for all subnets. Only the subnet ID hextet is incremented in hexadecimal for each subnet.
- - - - the allocation of five IPv6 subnets, with the subnet ID field 0001 through 0005 will be used for this example. Each /64 subnet will provide more addresses than will ever be needed.