Check Point NG/AI: Next Generation with Application Intelligence Security Administration

By Daniel Kligerman

Appendix A: Class C Subnet Mask Cheat Sheet

This cheat sheet can come in handy when working with network addresses and subnet masks. A standard netmask is written 255.255.255.0 which is equivalent to the aggregate /24. Using aggregates has become popular because computer people tend to be lazy and it only requires three keystrokes.

Table A.1: Netmasks and Aggregates
Netmasks and Aggregates
Subnet Mask Subnet Bits/Aggregate Number of Subnets Network Address 0	255.255.255.0 24 1 Host IP Range 1 - .254	Hex Mask Host Bits Hosts per Subnet Broadcast Addresses .255	0xffffff00 8 254
Subnet Mask Subnet Bits/Aggregate Number of Subnets Network Address .0 .128	255.255.255.128 25 2 Host IP Range .1 - .126 .129 - .254	Hex Mask Host Bits Hosts per Subnet Broadcast Addresses .127 .255	0xffffff80 7 126
Subnet Mask Subnet Bits/Aggregate Number of Subnets Network Address .0 .64 .128 .192	255.255.255.192 26 4 Host IP Range .1 - .62 .65 - .126 .129 - .190 .193 - .254	Hex Mask Host Bits Hosts per Subnet Broadcast Addresses .63 .127 .191 .255	0xffffffc0 6 62
Subnet Mask Subnet Bits/Aggregate Number of Subnets Network Address .0 .32 .64 .96	255.255.255.224 27 8 Host IP Range .1 - .30 .33 - .62 .65 - .94 .97 - .126	Hex Mask Host Bits Hosts per Subnet Broadcast Addresses .31 .63 .95 .127	0xffffffe0 5 30
Network Address	Host IP Range	Broadcast Addresses
.128	.129 - .158	.159
.160	.161 - .190	.191
.192

< Previous Excerpt

Purchase This Book

Check Point NG/AI: Next Generation with Application Intelligence Security Administration

TABLE OF CONTENTS

Appendix A: Class C Subnet Mask Cheat Sheet

Contact Preferences

This is embarrasing...

Customize Your GlobalSpec Experience

Select Your Free Newsletters

Industry Newsletters

Select Your Free Product Alerts

This is embarrasing...