# Q7(b) · NAT four packet stages

Subject: Computer Networks

Exam: TEE

Reader: https://deep-learning-study-room.vercel.app/cn/#tee/papers/paper-2024-ai-final/q7b

Canonical: https://deep-learning-study-room.vercel.app/read/cn/tee/papers/paper-2024-ai-final--q7b/

Exact historical variant. Current-syllabus questions solved; excluded topics and source limitations stated.

### Q7(b). Host10.0.1.10:3469 sends to128.119.166.184:80 through public address135.122.101.214. For outbound before/after NAT and inbound before/after NAT, identify source/destination IPs, whether source port changes, and whether a new NAT-table entry is made. The pictured existing table concerns10.0.1.20 rather than the sending host. [10 marks]

### Answer

This historical topic is not named in the current six-unit syllabus. It is recorded for a complete paper inventory, but excluded from the required preparation and current-unit mark totals.