Information Technology Reference
In-Depth Information
23.14.16
Explain how ICMP and the options field would be used to determine the following
information:
(i)
Whether a destination node is responding to TCP/IP communications.
(ii)
The route to a destination node.
(iii)
The route to a destination node, with the time delay between each
gateway.
23.14.17
Explain how the Options field can be used to set the route that a datagram can
take.
23.14.18
Determine the IP addresses, and their type (i.e. class A, B or C), of the following
32-bit addresses:
10001100.01110001.00000001.00001001
(i)
01000000.01111101.01000001.11101001
(ii)
(iii)
10101110.01110001.00011101.00111001
23.14.19
Determine the countries which use the following primary domain names:
(a)
de
(b)
nl
(c)
it
(d)
se
(e)
dk
(f)
sg
(g)
ca
(h)
ch
(i)
tr
(j)
jp
(k)
au
Determine some other domain names.
23.14.20
For a known TCP/IP network determine the names of the nodes and their Internet
addresses.
23.14.21
For a known TCP/IP network determine how the DNS is implemented and how IP
addresses are granted.
23.14.22
If a subnet mask on a Class B network is 255.255.240.0, show that there can be 16
connected networks, each with 4095 nodes on a Class B network.
23.15 Notes from the author
Which two people have done more for world unity than anyone else? Well, Prof. TCP and
Dr. IP must be somewhere in the Top 10. They have done more to unify the world than all the
diplomats in the world have. They do not respect national borders, time zones, cultures, in-
dustrial conglomerates or anything like that. They allow the sharing of information around
the world, and are totally open for anyone to use. Top marks to Prof. TCP and Dr. IP, the
true champions of freedom and democracy.
Many of the great inventions/developments of our time were things that were not really
predicted, such as CD-ROMs, RADAR, silicon transistors, fibre optic cables, and, of course,
the Internet. The Internet itself is basically an infrastructure of interconnected networks
which run a common protocol. The nightmare of interfacing the many computer systems
around the world was solved because of two simple protocols: TCP and IP. Without them the
