Netopia D7100 SDSL 用户手册

This incoming IP packet (10000000) has a source IP address that does not match the network address in the 
Source IP Address field (00000000) in the Netopia D-Series. This rule will for ward this packet because the 
packet does not match.

Incoming packet has the source address of 200.1.1.184.

Since the Source IP Network Address in the Netopia D-Series’s filter rule is 01100000 (=96 decimal), and the 
source IP address after the logical AND is 1011000, this rule does not match and this packet will be passed.

Incoming packet has the source address of 200.1.1.104.

255.255.255.128

10000000

(Per form the logical AND)

10000000

(Logical AND result)

Filter Rule:

200.1.1.96

(Source IP Network Address)

255.255.255.240

(Source IP Mask)

For ward = No

(What happens on match)

IP Address

Binar y Representation of 
last byte

200.1.1.184

10111000

(Source address in incoming IP packet)

AND

255.255.255.240

11110000

(Per form the logical AND)

10110000

(Logical AND result)

Filter Rule:

200.1.1.96

(Source IP Network Address)

255.255.255.240

(Source IP Mask)

For ward = No

(What happens on match)

IP Address

Binar y Representation

200.1.1.104

01101000

(Source address in incoming IP packet)

AND