DCICN 1.0: IPv4 and the Routing Process

Data center network engineers and learners embarking on a network administration or engineering career who wish to expand their skills in data center networks


Expected Duration
125 minutes

Routing is the process that forwards data packets between networks or subnetworks, using a Layer 3 device. The routing process uses network routing tables, protocols, and algorithms to determine the most efficient path for forwarding the IP packet. Subnetworks, also known as subnets, are very common in all but the smallest of network environments. Subnetworks segment the network into smaller divisions that have their own addresses. Each host is represented by a unique IP address. In some cases, some of the bits that are used for the host portion of an IP address are borrowed to create the subnet address. The subnet mask defines which part of the IP address represents the network part. This course describes how subnets function and how they are computed. Before you can understand subnetting, you need to understand binary numbers, so you will learn about routing between subnets, work with decimal and binary numbers interchangeably, and calculate subnet addresses. This course is one of a series in the Skillsoft learning path that covers the objectives for the Cisco exam 640-911: Introducing Cisco Data Center Networking.


The Routing Process

  • start the course
  • describe the function of a router in the IP packet delivery process
  • describe decimal and binary systems
  • describe the base-2 system
  • convert a decimal number to binary
  • convert a binary number to decimal
  • convert a hexadecimal number in a given scenario


  • describe how the block size technique allows for more addresses
  • describe how a subnet mask can be changed to create multiple subnetworks
  • identify the purpose of a subnet mask
  • match the subnet masks with their correct class
  • identify the number of bits that can be borrowed to form subnets
  • calculate how many subnets are created in a given scenario
  • calculate how many hosts per subnet are created in a given scenario
  • create subnet addresses
  • determine the subnets that will be produced in a given scenario
  • determine the usable range of ip addresses using the block method
  • determine the block size of a subnet, given an example
  • identify valid block sizes
  • determine the subnet ID, broadcast address, and usable address range of a given subnet
  • apply a subnet mask to a class c address
  • apply a subnet mask to a class b address
  • apply a subnet mask to a class a address

Practice: IPv4 Subnetting

  • plan for IPv4 subnetting





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