--- title: "BoQ for NITC four research labs" subject: "Internet and Intranet" chapter: 5 key: "semester_8/internet_and_intranet:boq-nitc-research-labs" source: https://www.bctengineer.com/q/semester_8/internet_and_intranet/boq-nitc-research-labs site: BCT Engineering --- # BoQ for NITC four research labs Internet and Intranet ยท Chapter 5: Designing Internet Systems and Servers - Asked in: 2072 Asoj, 12 marks - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_8/internet_and_intranet/boq-nitc-research-labs - Whole chapter: https://www.bctengineer.com/md/semester_8/internet_and_intranet/chapter-5 ## Question NITC building had 4 research labs each having 24 computers. All labs are located at the 1st floor. Each computer is to be connected in the network from NCR located at 2nd floor. Prepare a bill of quantity (BoQ) with necessary network resources required for complete networking. The BoQ must include estimation of all network resources required. ## Short answer For 96 PCs plus 4 APs, estimate 100 CAT6 drops at 35 m average, giving 3,850 m and 13 boxes. Use 100 faceplates, 5 patch panels, 4 access switches plus 1 PoE switch, and 1 core L3 switch. Assign each lab a /27 subnet from 192.168.10.0/24. ## Answer #### Assumptions - 4 labs x 24 computers = 96 computers, all on the 1st floor. The Network Control Room (NCR) is on the 2nd floor, directly above. - One single-port CAT6 outlet per computer, plus 1 wireless AP per lab (4 drops). Total drops = 96 + 4 = 100. - Floor height 4 m; horizontal run about 28 m; plus slack: average cable run per drop = 35 m (under the 90 m limit). - 10% wastage on cable. Cable box = 305 m. Switches are 24-port GE with SFP uplinks. The NCR also needs a router/firewall for the internet link. #### Layout ```text Internet | [Router/Firewall] NCR (2nd floor) | [Core L3 switch] | [Patch panels x5]--[Switch x5 (4 + 1 PoE)] | | CAT6 (100 runs, 35 m average) ---+---------+---------+---------+--- 1st floor Lab 1 Lab 2 Lab 3 Lab 4 24 PC 24 PC 24 PC 24 PC + AP + AP + AP + AP ``` #### Quantity estimation 1. Outlets (single-port faceplate with jack): 96 + 4 = **100**. 2. Cable length: 100 x 35 = 3,500 m. With 10% wastage = 3,850 m. Boxes = 3,850 / 305 = 12.6, so **13 boxes**. 3. Patch panel ports = 100. 100 / 24 = 4.2, so **5 patch panels** (24-port). 4. Switches: 96 PC ports / 24 = 4 switches fully used, plus 1 PoE switch for the 4 APs and spare ports = **5 access switches**. One core L3 switch connects them to the router = **1**. 5. Patch cords: user side 2 m = 100; panel to switch 1 m = 100; switch to core 1 m = 5. Total **205**. 6. Rack space: 5 panels (5U) + 5 switches (5U) + core (1U) + router/firewall (1U) + cable managers (4U) + UPS (2U) = 18U, so one 24U or 42U rack. #### Bill of Quantity | S.N. | Item | Specification | Qty | |---|---|---|---| | 1 | CAT6 UTP cable | 305 m box | 13 boxes | | 2 | Faceplate + jack | Single-port, CAT6 | 100 | | 3 | Patch panel | 24-port CAT6 | 5 | | 4 | Patch cord 2 m | CAT6 | 100 | | 5 | Patch cord 1 m | CAT6 | 105 | | 6 | Access switch | 24-port GE + 2 SFP | 4 | | 7 | PoE switch | 24-port PoE+ | 1 | | 8 | Core L3 switch | 24-port, SFP+ | 1 | | 9 | Wireless AP | Dual-band, PoE | 4 | | 10 | Router / firewall | NAT, DHCP | 1 | | 11 | Rack | 42U with cable managers | 1 | | 12 | UPS | 2 kVA | 1 | | 13 | PVC conduit / trunking | 25 mm | 150 m | | 14 | Cable ties, labels | | lot | | 15 | Cable tester | | 1 | #### IP plan (192.168.10.0/24) | Network | Subnet | Usable | Gateway | |---|---|---|---| | Lab 1 | 192.168.10.0/27 | 30 | .1 | | Lab 2 | 192.168.10.32/27 | 30 | .33 | | Lab 3 | 192.168.10.64/27 | 30 | .65 | | Lab 4 | 192.168.10.96/27 | 30 | .97 | | Wi-Fi / APs | 192.168.10.128/27 | 30 | .129 | | Servers / management | 192.168.10.160/27 | 30 | .161 | Each /27 has 30 usable hosts, enough for 24 PCs and a gateway with spare addresses. The core L3 switch routes between the subnets, and the router provides DHCP (through DHCP relay on the core) and NAT to the internet. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. How many network outlets (drops) does the NITC BoQ calculate? A. 96 B. 100 C. 104 D. 120 Answer: B. 4 labs x 24 PCs = 96 computers, plus 1 AP per lab (4), giving 100 drops. (Key point: Counting drops) 2. How is the number of CAT6 boxes found? A. 100 x 35 m = 3,500 m, add 10% wastage to get 3,850 m, divide by 305 m and round up to 13 B. 3,500 m divided by 305 m rounded down to 11 C. 96 x 35 m divided by 100 m per box D. 100 x 90 m divided by 305 m Answer: A. Wastage is added before dividing by the 305 m box length, and the result 12.6 is rounded up to 13 boxes. (Key point: Cable estimation) 3. Why are 5 patch panels needed? A. One per lab plus a spare B. 100 ports divided by 24 per panel is 4.2, rounded up to 5 C. Each switch needs two panels D. Each AP needs its own panel Answer: B. There are 100 terminated cables and each panel has 24 ports, so 4.2 panels means 5. (Key point: Patch panel count) 4. How are the 205 patch cords made up? A. 100 user-side 2 m, 100 panel-to-switch 1 m, and 5 switch-to-core 1 m B. 96 + 96 + 13 C. 200 user-side only D. 100 panel-to-switch and 105 switch-to-router Answer: A. Each drop needs a 2 m user cord and a 1 m panel-to-switch cord, and each of the 5 access switches needs a 1 m uplink to the core. (Key point: Patch cord total) 5. Why is an extra PoE switch included beyond the four 24-port access switches? A. To provide a second core B. To power the 4 wireless APs over the cable and give spare uplink ports C. To connect the router to the internet D. To extend cables beyond 90 m Answer: B. Four switches fully serve the 96 PCs; one PoE switch powers the 4 APs. (Key point: Why a separate PoE switch) ## Related in Internet and Intranet - [BOQ for DOECE four computer labs](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Aboq-doece-four-labs) โ€” Internet and Intranet, chapter 5 - [BoQ for IOE ICT building six labs](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Aboq-ioe-ict-six-labs) โ€” Internet and Intranet, chapter 5 ## Related in other subjects - [Prepare AOC, BOQ and summary of cost](https://www.bctengineer.com/question.md?key=semester_7%2Festimating_and_costing%3Aaoc-boq-summary-numerical) โ€” Estimating and Costing, chapter 2