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Mastering Subnets: Benefits, Masking, and CIDR Notation in TCP/IP

Understand how subnets and supernets enhance networking, design subnet masks for business needs, learn CIDR notation, and convert subnet masks. Discover subnetting best practices and CIDR routing for efficient network planning and management.

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Mastering Subnets: Benefits, Masking, and CIDR Notation in TCP/IP

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  1. Hour 5 Subnetting

  2. you will be able to • Explain how subnets and supernets are used • Explain the benefits of subnetting • Develop a subnet mask that meets business needs • Describe supernetting and CIDR notation

  3. Subnets in TCP/IP

  4. To borrow some of the bits from the host ID to designate a subnet address. • Subnet uses a 1 in the part of the network ID or subnet ID. • And uses a 0 in the IP address that is part of the host ID.

  5. Converting a Subnet Mask to Dotted Decimal Notation 11111111111111111111111100000000 255.255.255.0

  6. Working with Subnets • The subnet mask defined how many bits will be used for the subnet ID . • The best solution is to plan your network first and determine the number and location of all network segments, then assign each segment a subnet ID.

  7. Figure 5.6, the network 129.100.0.0 is divided into four subnets

  8. Figure 5.7. A subnetted Class C network.

  9. Classless Internet Domain Routing • Classless Internet Domain Routing (CIDR) is a technique that allows a block of network IDs to be treated as a single entity in routing tables. • called a supernet mask. • the supernet mask in effect takes bits away from the network ID

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