Amanda is running a small company. She asks her ISP, Acme Networks, to give

her enough addresses for $1,200$ hosts. Acme allocates a subblock from the $192\mathrm{.}1.*$ address

range that they own and tells Amanda to use the following addresses:

$192\mathrm{.}1\mathrm{.}0.*$

$192\mathrm{.}1\mathrm{.}1.*$

$192\mathrm{.}1\mathrm{.}2.*$

$192\mathrm{.}1\mathrm{.}3.*$

$192\mathrm{.}1\mathrm{.}4.*$

a$.$ Amanda has heard that the size of the Internet routing table has grown to huge

proportions, and that to be a good citizen, she should announce the fewest number of

routes possible to exactly cover her IP addresses. Under CIDR, what is the smallest set of

network numbers that the rest of the world would use to describe Amanda$$s networks

$($please use address & prefix format $-$ e$.$g$.128\mathrm{.}2/16)?$

b$.$ Amanda has a second ISP that she uses, RoadRunner Networks. She announces some of

her network addresses to both Acme and RoadRunner $($Amanda hadn$$t talked to you yet

$$ these announcements do not correspond to the answers you provided to the previous

question$).$ As a result, some router far away in the network produces a forwarding table

with the following entries:

Destination Next Hop

$-----------------------------$

$192\mathrm{.}1/161\mathrm{.}2\mathrm{.}3\mathrm{.}4$

$192\mathrm{.}1\mathrm{.}0/231\mathrm{.}2\mathrm{.}3\mathrm{.}5$

$192\mathrm{.}1\mathrm{.}4/241\mathrm{.}2\mathrm{.}3\mathrm{.}6$

$192\mathrm{.}1\mathrm{.}1/241\mathrm{.}2\mathrm{.}3\mathrm{.}7$

Which next hop should the router use for a packet destined to $192\mathrm{.}1\mathrm{.}0\mathrm{.}1?$