Ip Numbered And Unnumbered Links - 3Com 3C840 User Manual

IP Numbered and
Unnumbered Links
2xx.xxx.188.176, and the subnet mask, 255.255.255.248, together to
determine the number of addresses we had to work with.
First, we convert the last octet (the eight-bit decimal equivalent) of the IP
address (176) and the last octet of the subnet mask (248) to binary:
176
248
The 0s in the subnet mask define our address range, and their three
binary positions (23) yield eight addresses. The addresses that contain all
zeroes and all ones (2xx.xxx.188.176 and 2xx.xxx.188.183,
respectively--see the table below) are reserved as broadcast addresses and
cannot be used.
Also, we were told that 2xx.xxx.188.177 would be assigned to the
OfficeConnect Remote 840's LAN interface, so we can't assign it to any
other computer(s) on the LAN.
Table B-2 IP Addresses
Last Octet (In Last Octet (In
Binary) Decimal)
10110 000 176
10110 001 177
10110 010 178
10110 011 179
10110 100 180
10110 101 181
10110 110 182
10110 111 183
The OfficeConnect Remote 840 supports two types of IP addressing on
the Remote Site links: numbered and unnumbered. A numbered link
IP Addressing Basics
Status
Reserved - broadcast address
To be assigned to OfficeConnect Remote 840
Available
Available
Available
Available
Available
Reserved - broadcast address
B-7