# Sources, exclusions and corrections

Subject: Computer Networks

Exam: M2

Reader: https://deep-learning-study-room.vercel.app/cn/#m2/about/about/sources

Canonical: https://deep-learning-study-room.vercel.app/read/cn/m2/about/about--sources/

CN M2 · source mapping

Primary scope: your message, “From ALOHA to Unit 4 complete,” and the current AY 2026–27 Computer Networks syllabus, code 702AI0C023. Pattern: the confirmed 2+2 compulsory and any two 3-mark questions. No separate CN course-policy document was supplied.

Supplied materials reviewed: the CN English AnswerBook PDF/DOCX as a secondary reference; the December 2025 and February 2026 question papers and associated answer schemes extracted from the two Computer Networks ZIPs. The large answer-book contains substantial material outside this M2 cutoff; its broad predictions and extra topics do not redefine the confirmed portion.

## Corrections and conventions

- The syllabus’s “CDMA/CA” is treated as the standard CSMA/CA collision-avoidance topic, consistent with the surrounding random-access list.
- The final-paper IPv6 scheme incorrectly describes four omitted groups in 0:15::1:12:1213. Five groups are visible, so :: inserts three. Its displayed expanded address already has the correct eight groups.
- ALOHA results are explicitly tied to the equal-frame Poisson collision model. Offered traffic, normalized throughput, successful frames/s and success probability are distinguished.
- Bellman–Ford solutions declare an in-place edge order; intermediate tables can differ under another valid convention.
- Subnet host-count exceptions /31 and /32 are kept separate from ordinary broadcast-subnet calculations.
- Fragmentation and DHCP timer arithmetic are supporting extensions; prioritize the explicitly named core topics first.

## Primary technical references

- [MIT OpenCourseWare · random access](https://ocw.mit.edu/courses/16-36-communication-systems-engineering-spring-2009/bd06e398d455db074059d50f6abc953e_MIT16_36s09_lec21_22.pdf)
- [Cisco · Ethernet collision and duplex mechanisms](https://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1904.html)
- [RFC 4632 · CIDR](https://www.rfc-editor.org/rfc/rfc4632)
- [RFC 5952 · canonical IPv6 representation](https://www.rfc-editor.org/rfc/rfc5952)
- [RFC 8200 · IPv6 packet format](https://www.rfc-editor.org/rfc/rfc8200)
- [RFC 3021 · /31 point-to-point addressing](https://www.rfc-editor.org/rfc/rfc3021)
- [RFC 826 · ARP](https://www.rfc-editor.org/rfc/rfc826)
- [RFC 903 · RARP](https://www.rfc-editor.org/rfc/rfc903)
- [RFC 2131 · DHCP](https://www.rfc-editor.org/rfc/rfc2131)
- [RFC 2453 · RIPv2](https://www.rfc-editor.org/rfc/rfc2453)
- [RFC 2328 · OSPFv2](https://www.rfc-editor.org/rfc/rfc2328)

This release covers CN M2, not Units 1–6 as a complete TEE course. The matched TEE questions are included because they test this M2 material. No video is claimed as generated or reviewed in this CN release.