First and Last Host

Lesson 22 of 46 in Coddy's IP Addressing and Subnetting course.

With the bookends known, the machine range is simple: the first host is the network address plus one, and the last host is the broadcast minus one.

For 10.1.1.0/26: network 10.1.1.0, broadcast 10.1.1.63, so machines live from 10.1.1.1 to 10.1.1.62.

By convention the first host often goes to the router of the subnet, which is why gateway addresses so often end in .1.

Challenge

Beginner

For the subnet 10.1.1.0/26, print the first usable host address, then the last, each on its own line.

Expected output:

10.1.1.1
10.1.1.62

Try it yourself

Terminal

All lessons in IP Addressing and Subnetting

1Bits and Binary

Numbers as Bits Binary to Decimal Powers of Two Recap - Binary Warm-up

4CIDR Notation

Goodbye Classes Reading CIDR Block Sizes Recap - CIDR Reading

7Special Addresses

Private Ranges Loopback Link-Local Zero and Broadcast

10Capstone - The Office

The Floor Plan Sizing Each Team Carving the Block The Router's View Recap - Ship the Plan

2IPv4 Anatomy

Four Octets The 32-Bit View Network and Host Valid or Not Recap - Read an Address

5Inside a Subnet

Network Address Broadcast Address Usable HostsFirst and Last HostRecap - Subnet Facts

8Planning Networks

Right-Sizing VLSM Step by Step Allocation Order Checking for Overlap Recap - Plan a Network

3The Subnet Mask

What a Mask Does Mask to Prefix Prefix to Mask ANDing It Out Recap - Mask Basics

6Subnetting Drills

The Block Size Trick Which Subnet Am I In Splitting a /24 Splitting Again Recap - Subnetting Drills

9IPv6 First Steps

Why IPv6 Reading IPv6 Prefixes in IPv6 Recap - IPv6 Basics

Practice on your own: Terminal playground