Planning Your Network
Network Worksheets
Figure 3-4 X.25 Network Map
B
NET1
DTC | NET3 |
| C 192.003.251 XXX |
| X.25 |
Central Admin
Node
X.25 PSN
H
I
J
X.25 Network Table
Refer to the X.25 network map to fill in the X.25 network table as shown in Table 3-6.We complete the first column by listing the names of all the nodes on NET3. Each node is assigned an IP address that is unique within the network. Only the node portions of the IP addresses are listed since the IP network address is listed at the top of the table. In the third column of the table, node H is indicated as a central administrative node. The X.25 (subnet) address for each node is listed in the fifth column of the network table. The X.25 address is a decimal number (up to 15 digits) identifying a node’s location on the X.25 subnet for connections using switched virtual circuits (SVCs). Usually this address is inserted in CALL packets to set up connections using SVCs. If the network you will access is a public packet switching network (PSN), these addresses (where appropriate) are recorded on the network subscription form.