Exam Drill Phase 2 of 4
30% Exam Weighting
Phase 2 Exam Drill: Subnetting Math & Protocol Derivations
Deriving network IDs, broadcast addresses, FLSM/VLSM host allocations, binary ANDing, and CIDR prefix conversions.
Part 1: FLSM & Subnet Math Calculations
P2-Q01
[10 Marks]
An ISP assigns an organization the IP block 192.168.10.0/24. The network engineer must create four (4) equal-sized subnets using Fixed Length Subnet Masking (FLSM). Calculate:
- The new Subnet Mask in dotted decimal and new CIDR prefix notation [2 Marks].
- The Network ID for each of the 4 subnets [3 Marks].
- The Broadcast Address for each of the 4 subnets [3 Marks].
- The Usable IP Address Range for Subnet 2 [2 Marks].
Part 2: VLSM Variable Length Subnet Masking
P2-Q02
[15 Marks]
A university campus network has been allocated the IP block 10.1.1.0/24. Design a Variable Length Subnet Masking (VLSM) addressing scheme to satisfy the following departmental host requirements without wasting IP space:
- Admin Department: 150 hosts
- Faculty of Applied Science: 88 hosts
- Marketing Department: 60 hosts
- ICT Support: 25 hosts