User's Manual
Table Of Contents
- 1 Introduction
- 2 Getting to know the device
- 3 Computer configurations under different OS, to obtain IP address automatically
- 4 Utility CD execution
- 5 Getting Started with the Web pages
- 6 Overview
- 7 Status
- 8 Internet Access
- 9 Local Network Configuration
- 10 DHCP Settings
- 11 DHCP Static Configuration
- 12 LAN IPv6 Configuration
- 13 Wireless Network
- 14 Routing
- 15 DMZ
- 16 Virtual Server
- 17 NAT Forwarding
- 18 ALG
- 19 NAT Exclude IP
- 20 Port Trigger
- 21 FTP ALG Portl
- 22 Nat IP Mapping
- 23 IP QoS
- 24 CWMP Config
- 25 Port Mapping
- 26 Bridging
- 27 Client Limit
- 28 Tunnel Configuration
- 29 Others
- 30 IGMP Proxy
- 31 UPnP
- 32 SNMP
- 33 DNS Configuration
- 34 Dynamic DNS Configuration
- 35 MAC Filtering
- 36 IP/Port Filtering
- 37 URL Filter
- 38 ACL Configuration
- 39 DoS
- 40 Firmware Update
- 41 Backup/Restore
- 42 Password
- 43 Commit/Reboot
- 44 Time Zone
- 45 Log
- 46 Diagnostic
User’s Guide IP Addresses, Network Masks, and Subnets
255.255.255.192 or 11111111. 11111111.
11111111.11000000
The two extra bits in field4 can have four values (00, 01, 10, 11),
so there are four subnets. Each subnet uses the remaining six
bits in field4 for its host IDs, ranging from 1 to 62.
Note
Sometimes a subnet mask does not specify any additional
network ID bits, and thus no subnets. Such a mask is called a
default subnet mask. These masks are:
Class A: 255.0.0.0
Class B: 255.255.0.0
Class C: 255.255.255.0
These are called default because they are used when a network is
initially configured, at which time it has no subnets.
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