1.0 Network+ Certification Cram Notes : Networking Fundamentals
1.4 Configuring a subnet and use appropriate IP addressing schemes.
Configuring a subnet involves dividing a larger network into smaller subnetworks. The goal of subnetting is to increase network security, optimize network performance, and reduce network congestion. When configuring a subnet, you need to use appropriate IP addressing schemes to ensure that each subnetwork is uniquely identified and that communication between subnetworks is possible.
To configure a subnet, you need to determine the subnet mask, which defines the number of bits used for the subnet address and the number of bits used for the host address. The subnet mask is then applied to the IP address of each device in the subnetwork to determine its unique subnet address.
Once the subnet mask has been determined, you can use IP addressing schemes such as Classless Inter-Domain Routing (CIDR) or Variable Length Subnet Masking (VLSM) to allocate IP addresses to each subnetwork. CIDR allows you to specify a prefix length to indicate the number of bits used for the subnet address, while VLSM allows you to specify different subnet masks for different subnetworks, depending on the number of addresses needed.
It is important to choose the appropriate IP addressing scheme based on the size and complexity of your network, as well as your specific requirements for security, performance, and scalability.
Public vs. private
The IP address space can be divided into two categories: public and private. Public IP addresses are assigned by the Internet Assigned Numbers Authority (IANA) and are used to identify devices on the internet. Private IP addresses, on the other hand, are not directly reachable from the internet and are used for internal network communication.
