
Appendix E IP Addresses and Subnetting
NWA-3500/NWA-3550 User’s Guide
374
The following figure shows the company network after subnetting. There are now
two sub-networks,
A
and
B
.
Figure 288
Subnetting Example: After Subnetting
In a 25-bit subnet the host ID has 7 bits, so each sub-network has a maximum of
2
7
– 2 or 126 possible hosts (a host ID of all zeroes is the subnet’s address itself,
all ones is the subnet’s broadcast address).
192.168.1.0 with mask 255.255.255.128 is subnet
A
itself, and 192.168.1.127
with mask 255.255.255.128 is its broadcast address. Therefore, the lowest IP
address that can be assigned to an actual host for subnet
A
is 192.168.1.1 and
the highest is 192.168.1.126.
Similarly, the host ID range for subnet
B
is 192.168.1.129 to 192.168.1.254.
Example: Four Subnets
The previous example illustrated using a 25-bit subnet mask to divide a 24-bit
address into two subnets. Similarly, to divide a 24-bit address into four subnets,
you need to “borrow” two host ID bits to give four possible combinations (00, 01,
10 and 11). The subnet mask is 26 bits
(11111111.11111111.11111111.
11
000000) or 255.255.255.192.
Summary of Contents for 802.11a/g Wireless CardBus Card ZyXEL AG-120
Page 2: ......
Page 8: ...Safety Warnings NWA 3500 NWA 3550 User s Guide 8...
Page 10: ...Contents Overview NWA 3500 NWA 3550 User s Guide 10...
Page 20: ...Table of Contents NWA 3500 NWA 3550 User s Guide 20...
Page 22: ...22...
Page 34: ...Chapter 1 Introducing the NWA NWA 3500 NWA 3550 User s Guide 34...
Page 52: ...Chapter 4 Management Mode NWA 3500 NWA 3550 User s Guide 52...
Page 108: ...108...
Page 146: ...Chapter 9 SSID Screen NWA 3500 NWA 3550 User s Guide 146...
Page 160: ...Chapter 10 Wireless Security Screen NWA 3500 NWA 3550 User s Guide 160...
Page 178: ...Chapter 14 IP Screen NWA 3500 NWA 3550 User s Guide 178...
Page 186: ...Chapter 15 Rogue AP Detection NWA 3500 NWA 3550 User s Guide 186...
Page 198: ...Chapter 16 Remote Management Screens NWA 3500 NWA 3550 User s Guide 198...
Page 260: ...Chapter 21 Load Balancing NWA 3160 Series User s Guide 260...
Page 264: ...Chapter 22 Dynamic Channel Selection NWA 3160 Series User s Guide 264...
Page 276: ...Chapter 23 Maintenance NWA 3500 NWA 3550 User s Guide 276...
Page 277: ...277 PART III Troubleshooting and Specifications Troubleshooting 279 Product Specifications 285...
Page 278: ...278...
Page 284: ...Chapter 24 Troubleshooting NWA 3500 NWA 3550 User s Guide 284...
Page 292: ...292...
Page 368: ...Appendix D Importing Certificates NWA 3500 NWA 3550 User s Guide 368...
Page 386: ...Appendix F Text File Based Auto Configuration NWA 3500 NWA 3550 User s Guide 386...