$.$ Do the following problems:

a$.$ A network device is allocated an IP address of $117\mathrm{.}23\mathrm{.}18\mathrm{.}15/18.$ From what address

block is the IP address allocated? How many IP addresses are in the block?

b$.$ Given an IP address $172\mathrm{.}12\mathrm{.}13\mathrm{.}8$ and the mask $255\mathrm{.}255\mathrm{.}244\mathrm{.}0,$ what is the network

address?

c$.$ Given the IP address $223\mathrm{.}156\mathrm{.}168\mathrm{.}96/26.$ Express the address in binary notation; and

then in hexadecimal notation.

d$.$ Give an example of an IPv$6$ address, and then its abbreviated version.

e$.$ The diagram shows a graph representation $($G$)$ of an internet, with costs associated with

the edges $($representing subnets$).$ The letters label routers.

$2024.$ Prof. Amenyo. CS $461.$ Final Exam. York College, CUNY. Page $3$ of $3$

f$.$ Assign IP addresses $($IP v$4)$ to the networks and subnets represented by the graph G$.$

g$.$ Assign IP addresses $($IP v$6)$ to the networks and subnets represented by the graph G$.$

c$.$ Compare and contrast IP v$4$ and IP v$6$ addressing schemes.