Prestige 652H/HW Series User’s Guide
IP Subnetting
B-1
Appendix B
IP Subnetting
IP Addressing
Routers “route” based on the network number. The router that delivers the data packet to the correct
destination host uses the host ID.
IP Classes
An IP address is made up of four octets (eight bits), written in dotted decimal notation, for example,
192.168.1.1. IP addresses are categorized into different classes. The class of an address depends on the value
of its first octet.
Class “A” addresses have a 0 in the left most bit. In a class “A” address the first octet is the network
number and the remaining three octets make up the host ID.
Class “B” addresses have a 1 in the left most bit and a 0 in the next left most bit. In a class “B” address
the first two octets make up the network number and the two remaining octets make up the host ID.
Class “C” addresses begin (starting from the left) with 1 1 0. In a class “C” address the first three octets
make up the network number and the last octet is the host ID.
Class “D” addresses begin with 1 1 1 0. Class “D” addresses are used for multicasting. (There is also a
class “E” address. It is reserved for future use.)
Chart B-1 Classes of IP Addresses
IP ADDRESS:
OCTET 1
OCTET 2
OCTET 3
OCTET 4
Class A
0
Network number
Host ID
Host ID
Host ID
Class B
10
Network number
Network number
Host ID
Host ID
Class C
110
Network number
Network number
Network number
Host ID
Host IDs of all zeros or all ones are not allowed.
Therefore:
A class “C” network (8 host bits) can have 2
8
–2 or 254 hosts.
A class “B” address (16 host bits) can have 2
16
–2 or 65534 hosts.
Summary of Contents for Prestige 652H series
Page 32: ......
Page 50: ......
Page 66: ......
Page 68: ......
Page 76: ......
Page 80: ......
Page 120: ...Prestige 652H HW Series User s Guide 8 12 WAN Setup Figure 8 6 Advanced WAN Backup ...
Page 128: ......
Page 146: ......
Page 148: ......
Page 162: ......
Page 178: ...Prestige 652H HW Series User s Guide 13 16 Firewall Screens Figure 13 8 Rule Edit Example ...
Page 196: ......
Page 198: ......
Page 204: ......
Page 214: ...Prestige 652H HW Series User s Guide 16 10 VPN Screens Figure 16 5 VPN IKE ...
Page 227: ...Prestige 652H HW Series User s Guide VPN Screens 16 23 Figure 16 8 Manual Setup ...
Page 238: ......
Page 258: ......
Page 277: ...Maintenance VIII Part VIII Maintenance This part covers the maintenance screens ...
Page 278: ......
Page 296: ......
Page 298: ......
Page 308: ......
Page 324: ......
Page 330: ......
Page 386: ......
Page 406: ......
Page 418: ......
Page 428: ......
Page 450: ......
Page 454: ......
Page 464: ......
Page 470: ......
Page 486: ......
Page 494: ......
Page 500: ......
Page 512: ......
Page 516: ......
Page 520: ......
Page 560: ......
Page 574: ......