How things could be solved...
Exercise 6
Assignment 6.1
- I need to calculate the mask for network (24 bits = 255.255.255.0) and
corresponding broadcast (which is 10.0.0.255).
- Command
ifconfig eth0 10.0.0.123 netmask 255.255.255.0 broadcast
10.0.0.255 will then configure network interface correctly.
Assignment 6.2
I'll try pinging specific computers. It used do be possible to ping the
broadcast address (i.e. ping -b 10.0.0.255), however nowadays
every computer is configured to ignore broadcast pings.
Assignment 6.3
I add the following lines to /etc/network/interfaces
auto eth0
iface eth0 inet static
address 10.0.0.123
netmask 255.255.255.0
and if I really want to, I can also add gateway 10.0.0.254
(this solves me assignment 7.6 for free).
Assignment 6.4
It should be sufficient to use route add -net 192.168.0.0 netmask 255.255.255.0 gw 10.0.0.254.
Priklad 6.5
Ping and be happy panda ;-).
Priklad 6.6
I'll use route add default gw 10.0.0.254 and miraculously I can
instantly see the rest of (virtual) world. If I wanted, I could delete the
route added in assignment 7.4, given that the new route also covers this old
one.
Assignment 6.7
| Computer in net | Network addr | Network mask | Broadcast address |
| 198.81.129.100 | 198.81.128.0 | /18 = 255.255.192.0 | 198.81.191.255 |
| 158.195.16.244 | 158.195.16.0 | /23 = 255.255.254.0 | 158.195.17.255 |
| 18.7.22.83 | 18.0.0.0 | /8 = 255.0.0.0 | 18.255.255.255 |