 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| n |
Routing
|
|
|
|
– |
based
on IP destination address, network prefix (e.g. 129.13.42)
|
|
|
determines
physical subnet
|
|
|
|
– |
change
of physical subnet implies change of IP address to have a
|
|
|
topological
correct address (standard IP) or needs special entries in the
|
|
|
routing
tables
|
|
|
| n |
Specific
routes to end-systems?
|
|
|
|
– |
change
of all routing table entries to forward packets to the right
|
|
|
destination
|
|
|
|
– |
does
not scale with the number of mobile hosts and frequent changes in
|
|
|
the
location, security problems
|
|
|
| n |
Changing
the IP-address?
|
|
|
|
– |
adjust
the host IP address depending on the current location
|
|
|
|
– |
almost
impossible to find a mobile system, DNS updates take to long time
|
|
|
– |
TCP
connections break, security problems
|
|
