Explain briefly why a hierarchical addressing scheme is needed in a network of networks,

such as the worldwide telephone network or the Internet. A PC is configured with

IP Address: $137\mathrm{.}43\mathrm{.}68\mathrm{.}29,$ Subnet Mask: $255\mathrm{.}255\mathrm{.}224\mathrm{.}0,$ Gateway: $137\mathrm{.}43\mathrm{.}66\mathrm{.}1.$ What

range of IP addresses is in its subnet? What will it do with packets destined for IP

addresses outside this range