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BCM50a Integrated Router Configuration — Advanced
Appendix F
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, which is reserved for future
use.)
Содержание BCM50a
Страница 18: ...18 Figures N0115791 ...
Страница 22: ...22 Tables N0115791 ...
Страница 28: ...28 Preface N0115791 ...
Страница 44: ...44 Chapter 2 Introducing the SMT N0115791 SMT menus at a glance Figure 6 SMT overview ...
Страница 52: ...52 Chapter 2 SMT menu 1 general setup N0115791 ...
Страница 64: ...64 Chapter 4 LAN setup N0115791 ...
Страница 68: ...68 Chapter 5 Internet access N0115791 ...
Страница 82: ...82 Chapter 6 Remote Node setup N0115791 ...
Страница 114: ...114 Chapter 9 Network Address Translation NAT N0115791 ...
Страница 140: ...140 Chapter 12 SNMP Configuration N0115791 ...
Страница 144: ...144 Chapter 13 System security N0115791 ...
Страница 160: ...160 Chapter 14 System information and diagnosis N0115791 ...
Страница 174: ...174 Chapter 15 Firmware and configuration file maintenance N0115791 ...
Страница 188: ...188 Chapter 17 Remote Management N0115791 ...
Страница 208: ...208 Appendix B Triangle Route N0115791 ...
Страница 228: ...228 Appendix D PPPoE N0115791 ...
Страница 230: ...230 Appendix E Hardware specifications N0115791 ...
Страница 240: ...240 Appendix F IP subnetting N0115791 ...
Страница 278: ...278 Appendix G Command Interpreter N0115791 ...
Страница 308: ...308 Appendix J Log descriptions N0115791 ...
Страница 310: ...310 Appendix K Brute force password guessing protection N0115791 ...