Compatible Systems 5.4 Manuale Utente
280 Appendices
Chart 4: Broadcast Address Examples
The first three entries are traditional Class A, B and C network addresses and
use traditional masks. The last two are less traditional, “real world” examples.
Note in line 4 the change in the third octet between network address and
broadcast address. Line 5 shows what happens when a Class C network has
been subnetted.
use traditional masks. The last two are less traditional, “real world” examples.
Note in line 4 the change in the third octet between network address and
broadcast address. Line 5 shows what happens when a Class C network has
been subnetted.
Assigning an IP address
Use the network portion you were given by your administrator or ISP. Assign
the router interface a unique (i.e. unused) host portion. For example, if your
ISP tells you your network portion is 198.41.9, you could assign an interface
to 198.41.9.1. If you have a router with more than one interface, the network
(+ subnet) portions of each port’s IP address must be different.
the router interface a unique (i.e. unused) host portion. For example, if your
ISP tells you your network portion is 198.41.9, you could assign an interface
to 198.41.9.1. If you have a router with more than one interface, the network
(+ subnet) portions of each port’s IP address must be different.
Assigning a Subnet Mask
If you are using traditional Class A, B or C networks, CompatiView will auto-
matically calculate the value for you. If you wish to compute it yourself, use
the values in Chart 2.
matically calculate the value for you. If you wish to compute it yourself, use
the values in Chart 2.
If you are subnetting, use Chart 3 as a guide for Class C, or follow the same
scheme for Class A or B. Note that the IP address for a subnetted interface
(including the router interface on that subnet) must be in the correct subnet
range, as shown in Chart 3.
scheme for Class A or B. Note that the IP address for a subnetted interface
(including the router interface on that subnet) must be in the correct subnet
range, as shown in Chart 3.
Assigning a Broadcast Address
CompatiView will automatically compute the broadcast address for you. If
you wish to compute it yourself, use the examples in Chart 4 above as a guide.
You can then use CompatiView to check your results.
you wish to compute it yourself, use the examples in Chart 4 above as a guide.
You can then use CompatiView to check your results.
C
LASS
N
ETWORK
S
UBNET
M
ASK
B
ROADCAST
A
45.0.0.0
255.0.0.0
45.255.255.255
B
128.138.0.0
255.255.0.0
128.138.255.255
C
198.41.9.0
255.255.255.0
198.41.9.255
A*
45.21.16.0
255.255.252.0
45.21.19.255
C*
198.41.9.64
255.255.255.224
198.41.9.95