Converting a network

UTP is also the cable use to link one ring (segment) to another
via hubs. The nodes connected to the network use ISA NICs. The company is using
the IPv4 addressing scheme, and BOOTP is being used to assign addresses to
network nodes

The
new network administrator wants to switch to a star topology using fiber optic
cable for backbone and distributed backbone. The network would use Ethernet
architecture with the CMSA/CD access method. (You need to state which Ethernet
standard he should recommend and why.)The network would use routers for
connectivity devices instead of hubs.  Also, he wants to switch to the
IPv6 addressing scheme, and he wants to use DHCP to assign addresses to network
nodes.

If
he needs to leave a segment as a token ring, what connectivity device should he
use so that would allow connecting two systems with different architectures?
What does this type of device do that allow information from one system to be
read by another. The OSI model layer at which connectivity device operate has
an impact on what would be useful and how they impact the network. Include a
discussion of which layer of the OSI model the connectivity devices mentioned
in this question operate at and how that affects their function in the network.

What
would be the benefits of the changes he wants to make? What would be the
challenges? What objections might management have to making the changes and
what would be his arguments in response to those objections?

For
the purposes of this question you do not need to know about the token access
method. You just want to explain the features and benefits of CSMA/CD. Also,
your discussion of the backbone network choice should explain why that would be
a good choice compared to other backbone networks.