Answer Happy

Assume you are the network administrator of this organization. You are going to i. (0.8 points) assign a contiguous block of IP addresses to each subnet and label each subnet with the corresponding subnet address and mask, ii. (0.1 points) find and list the remaining IP addresses, i.e., show the first and last unallocated IP addresses. iii. (0.3 points) assign IP addresses to the interfaces of routers RO, R1, & R2 and hosts HO, H1, H2, & H3, iv. (0.6 points) construct the forwarding table for the routers RO, R1, & R2,
The following figure shows an organization with four subnets. Internet router (to Internet) RO H2 R1 e1 R2 B H1 20.45.128.10 20.45.128.11 H3 HO
with following constraints: 1. The expected number of hosts in each subnet is: a. Subnet A: 80 b. Subnet B: 200 c. Subnet C: 500 d. Subnet D: 500 2. The organization is allocated with the network address: 147.8.176.0/21. 3. Allocate address blocks contiguously such that no unallocated address block exists between subnets. 4. When allocating an IP address to a router's interface, always allocate the smallest usable IP address available in that subnet associated with that interface. If there are two routers associated with the same subnet, always assign an IP address to the router with a smaller ID first. 5. When allocating an IP address to a host's interface, always allocate the largest usable IP address available in that subnet associated with that interface. 6. You are expected to use the least amount of routing entries to represent all the subnets of this site in each forwarding table. 7. Present the routing table with the following information: Destination address/mask, Nexthop, Interface. where Nexthop gives the target IP address of the nexthop router along the path to the destination; if the destination network is the ultimate destination of the packet, leave Nexthop field as empty; Interface gives the network interface of the router that leads to the nexthop router or the ultimate destination. 7. Each router has a default routing entry for forwarding all packets destined to other Internet addresses that are not covered by existing entries.