a) List all the classful networks and its subnets.

b) Explain how the routers set up the IP routes in their routing tables.

172.16.0.0/24 Fa0/24 Fa0/1/scentral .1 Gigo/o 1 Se0/o/o Sed/o/1 .5 Central 200.200.200.0/30 66 Fa0 200.200.200-4/30 PC11 Area 0 Seofo/i 172.16.2.64/26 Gig/1 65 Fa0/1 .6 65 GigopiGigojo1 Fa0/1 Fa0/24 .66 Fao 1 R21 S21 si1 172.16.1.64/26 R11 Area 1 Area 2 Fa0/1 172.16.2.0/26 172.16.1.0/26 130 Fa 2 Gigo/0 Fa0/3 172.16.2.128/26 Fa0/24 Fa0/3 2 Gig0/0 Gig0/o 3 Gigo/o Gigo/1 R23 129 Fa0/1 Fa0/24 Fa0 Gigo/1 .193 R22 Gigo/1 129 R12 Fa0/1 PC23 .130 S12 Gigo/1 .193 R13 172.16.1.128/26 Fao/1 Fa0/1 194 Fa0 Fa0/24 194 Fa0 S13 PC13 172.16.1.192/26 172.16.2.192/26