Read the short answer first, then explain the example without reading. Complete the practice task and collect evidence. The 50/40/30/20-question counts follow twice the higher estimates in your table; they are a preparation target, not a guaranteed employer question bank.
Pehle short answer parho, phir example apni zubaan mein samjhao. Practice task complete karke evidence rakho. Answers ratta laganay ke bajaye steps aur reasoning samjho.
Lab requirements: Wireshark and appropriate capture permissions, local authorised test traffic or trusted vendor sample captures. Capture only traffic you are authorised to inspect. Preserve sensitive packet data and recognise that capture placement limits visibility.
Course outcomes / Aap kya kar saken ge
Beginner
Choose a capture point and recognise its limits
Use basic capture and display filters
Explain DNS, TCP setup and encryption boundaries
Capture point aur limits samjhao
Capture aur display filters use karo
DNS, TCP aur encryption explain karo
Intermediate
Interpret handshake failures and TCP analysis cautiously
Correlate packet timing with application and device logs
Analyse streams and conversations with scope limitations
Preserve capture provenance and write defensible findings
Handshake aur TCP analysis cautiously interpret karo
Packets aur app logs ki timing joro
Streams aur visibility limits analyse karo
Capture preserve aur clear findings likho
Learning path and practice schedule
This is a suggested 68-hour topic plan: 20 beginner hours plus 48 additional intermediate hours. At 4–6 hours a day, allow approximately 4–5 study days for the beginner stage and 12–17 study days total for this guided course. These are planning estimates, not promises of independent workplace competence. Repeat stages if the practical checkpoints are weak. Related subjects overlap in the combined plan.
Daily routine: 4–6 hours
Activity
Core 4 hours
Optional extra 2 hours
Concepts and official tutorial
60 minutes
—
Hands-on lab or evidence exercise
120 minutes
90 minutes: a harder case or failed scenario
Interview answers aloud
30 minutes
30 minutes: mock interview and follow-ups
Review and evidence log
30 minutes
—
Roman Urdu: Roz aik ghanta concepts, do ghantay practical, aadha ghanta answers bol kar aur aadha ghanta review karo. Extra do ghantay hon to difficult lab aur mock interview karo. Har haftay chhay study days aur aik rest/catch-up day rakho.
Study time means focused work, excluding breaks. Allocate at least half to practical work. If no tenant or lab is available, analyse supplied data and diagrams, but record that limitation and revisit the task when you have access.
Stage and time
Direction and practice
Resource / tutorial
Deliverable in Roman Urdu
1. Beginner 6 hours 1–2 study days
Capture and visibility
Read capture setup and map interfaces. Use a short authorised local capture or a trusted sample file; record capture context.
Capture provenance aur final report complete karo.
Practical exit check
Beginner: Complete a basic task using documentation, explain the result and recognise when to escalate.
Intermediate: Complete a common scenario without a step-by-step answer, justify your checks, test an alternative explanation and verify the result. You may consult references as analysts do at work.
Beginner par documentation ke saath basic task karo. Intermediate par ready-made steps ke baghair scenario solve, reasoning explain aur result verify karo.
Visual explanations
Original concept diagram. The three inputs on the left contribute to the central investigation or assessment, supporting the decision on the right. Relationships are conceptual, not a screenshot or an exhaustive deployment architecture.
Left ki information central analysis mein use hoti hai, phir decision ya response support hota hai.
Example troubleshooting decision. Use the branch that matches the observed evidence; complete verification after any corrective action.
Evidence ke mutabiq Yes ya No branch choose karo. Action ke baad result verify karo.
20 interview questions
Level labels indicate study focus, not a formal certification standard. Each short answer is a starting point for a 30–60 second response; expand with the example and your own honest experience.
A packet analyser used to capture and inspect network traffic.
Why this matters · English explanation
It sees traffic available at the chosen capture point, not automatically every packet on a network.
Roman Urdu explanation
Wireshark packets analyse karta hai. Selected capture point par available traffic hi nazar aata hai.
Worked context / illustrative example
A laptop capture shows its own DNS and TCP exchanges.
Your practical task
Explain the visibility limits of your capture point.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Capture filter versus display filter: what is the difference?
Short interview answer · English
Capture filters limit collected packets; display filters limit the view of already captured packets.
Why this matters · English explanation
Their syntax differs; displayed filtering does not remove packets from the original capture.
Roman Urdu explanation
Capture filter collection limit karta hai; display filter view. Dono ki syntax different hai.
Worked context / illustrative example
Capture filter: tcp port 443. Display filter: tcp.port == 443.
Your practical task
Explain which filter can lose uncaptured evidence.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Select the interface carrying the relevant traffic and confirm activity and addresses.
Why this matters · English explanation
VPNs, virtual adapters and remote paths can alter visibility.
Roman Urdu explanation
Relevant traffic wala interface choose karo. VPN aur virtual adapters ka effect check karo.
Worked context / illustrative example
A capture on Ethernet misses traffic routed through a VPN adapter.
Your practical task
List checks before starting a short authorised capture.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Generate harmless authorised test traffic and simplify filters before drawing conclusions.
Roman Urdu explanation
Interface, permissions aur filters check karo. Safe test traffic se collection verify karo.
Worked context / illustrative example
An overly restrictive capture filter excludes the DNS query being investigated.
Your practical task
Create a no-packets troubleshooting sequence.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Use valid display-filter fields and operators for the desired source, destination or either direction.
Why this matters · English explanation
Specify the question before choosing a filter.
Roman Urdu explanation
IP aur port filters se relevant packets dekho. Source, destination aur dono directions ka farq samjho.
Worked context / illustrative example
ip.addr == 192.0.2.10 or tcp.port == 443 are separate example display filters.
Your practical task
Compare ip.src with ip.addr.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
A handshake establishes transport state, not application authentication or successful business processing.
Roman Urdu explanation
SYN, SYN-ACK aur ACK connection establish kartay hain. Login success is se prove nahin hota.
Worked context / illustrative example
A client sends SYN but no SYN-ACK returns at the capture point.
Your practical task
Draw the exchange and explain a missing reply.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Give two application examples without assuming one protocol always wins.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Inspect queries, responses, names, record types, response codes and timing.
Why this matters · English explanation
A visible answer can still be wrong for the intended service.
Roman Urdu explanation
DNS query, answer, record type aur response code dekho. Answer ka correct hona bhi verify karo.
Worked context / illustrative example
A query receives NXDOMAIN for a name that the user expects to exist.
Your practical task
Use the dns display filter and explain the exchange.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
A repeated segment associated with TCP recovery or analysis inference.
Why this matters · English explanation
Loss, delays, capture artefacts and visibility gaps can affect interpretation.
Roman Urdu explanation
Retransmission repeated segment hai. Packet loss ke saath capture issue bhi ho sakta hai.
Worked context / illustrative example
A trace contains retransmission indicators after a delay.
Your practical task
Explain why one retransmission is not enough to locate the fault.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
A segment with the RST flag indicating connection termination or rejection in the observed context.
Why this matters · English explanation
Identify direction and surrounding packets; it does not by itself identify the root cause.
Roman Urdu explanation
RST connection reject ya terminate karne ka signal ho sakta hai. Direction aur context dekho.
Worked context / illustrative example
A SYN receives an immediate reset from the destination.
Your practical task
Compare that pattern with no response.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Follow TCP Stream conversation jorta hai. TLS content bina proper decryption ke readable nahin hota.
Worked context / illustrative example
Follow an unencrypted lab HTTP exchange.
Your practical task
Explain missing data and encryption limitations.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
A trace shows connection timing but not the protected message body.
Your practical task
List visible metadata and unavailable content.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Review transport setup, TLS handshake messages, available alerts and timing, then correlate application logs.
Why this matters · English explanation
Do not claim a specific certificate or cipher cause without supporting evidence.
Roman Urdu explanation
TCP aur TLS handshake, alerts aur app logs compare karo. Exact cause evidence ke baghair assume mat karo.
Worked context / illustrative example
TCP succeeds but the TLS exchange ends before application data.
Your practical task
Separate transport success from TLS and application success.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Warnings are starting points and may reflect capture limitations rather than actual network faults.
Roman Urdu explanation
Expert Information clues deti hai. Warning ko final root cause mat samjho.
Worked context / illustrative example
A warning appears in a capture that began halfway through a connection.
Your practical task
Explain how you would corroborate the warning.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Identify a suspicious hypothesis and a legitimate explanation.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
How do you investigate slow application performance?
Short interview answer · English
Compare DNS, connection setup, retransmissions, response timing and application evidence.
Why this matters · English explanation
A single capture point may not reveal where delay originates.
Roman Urdu explanation
DNS, TCP aur response timings compare karo. Aik capture point se delay ki exact jagah hamesha nahin milti.
Worked context / illustrative example
Fast connection setup is followed by a long wait for a server response.
Your practical task
Write a measured conclusion and next diagnostic step.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Providing visibility into traffic beyond the local endpoint at an authorised capture point.
Why this matters · English explanation
Mirroring capacity, direction and packet loss affect evidence completeness.
Roman Urdu explanation
SPAN ya TAP wider traffic capture ke liye hota hai. Mirror limitations aur packet loss check karo.
Worked context / illustrative example
A switch mirror provides a server segment's traffic to an analysis interface.
Your practical task
Define authorised scope and completeness checks.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
They align packet evidence with device and application logs.
Why this matters · English explanation
Different clocks or display settings can create a false event sequence.
Roman Urdu explanation
Packet aur app logs ki timing align karo. Time zone difference false sequence bana sakta hai.
Worked context / illustrative example
A trace displays local time while a server log records UTC.
Your practical task
Convert two fictional timestamps and document the basis.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Keep the original, record capture context and use controlled copies with appropriate access.
Why this matters · English explanation
Packet files can contain sensitive information; sanitisation must preserve investigative meaning.
Roman Urdu explanation
Original capture preserve aur context record karo. Sharing access controlled rakho.
Worked context / illustrative example
A limited capture excerpt is shared while the original remains protected.
Your practical task
Write a capture provenance and handling note.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
What can you conclude from packets versus what remains uncertain?
Short interview answer · English
State observed exchanges, failures and timing separately from hypotheses about cause or intent.
Why this matters · English explanation
Use additional capture points or logs where the evidence is incomplete.
Roman Urdu explanation
Observed packets ko facts aur cause ko hypothesis ke taur par clear rakho. Missing evidence explain karo.
Worked context / illustrative example
Repeated SYNs without replies show no reply at this capture point, not proof that a firewall caused it.
Your practical task
Deliver a one-minute evidence-based packet-analysis summary.
Evidence to save: your result or diagram, the checks used, one limitation and the next action. Jahan access na ho, table-top answer likho aur usay lab experience mat bolo.
Use valid display-filter fields and operators for the desired source, destination or either direction.
6. What is the TCP three-way handshake?
SYN, SYN-ACK and ACK establish a TCP connection.
7. TCP versus UDP: what is the difference?
TCP provides a reliable ordered byte stream; UDP provides datagrams without those transport guarantees.
8. How do you investigate DNS problems?
Inspect queries, responses, names, record types, response codes and timing.
9. What is a TCP retransmission?
A repeated segment associated with TCP recovery or analysis inference.
10. What is a TCP reset?
A segment with the RST flag indicating connection termination or rejection in the observed context.
11. What is Follow TCP Stream used for?
Reconstructing a conversation from available captured stream data.
12. Can Wireshark read HTTPS content automatically?
No; encryption protects application content, although metadata remains visible.
13. How do you investigate a TLS connection failure?
Review transport setup, TLS handshake messages, available alerts and timing, then correlate application logs.
14. What does Expert Information provide?
Analysis hints about notable packet conditions.
15. What are Conversations and Endpoints views used for?
Summarising communicating peers and traffic statistics.
16. How do you investigate slow application performance?
Compare DNS, connection setup, retransmissions, response timing and application evidence.
17. What is a SPAN port or network TAP used for?
Providing visibility into traffic beyond the local endpoint at an authorised capture point.
18. Why are timestamps and time zones important?
They align packet evidence with device and application logs.
19. How do you preserve and share a capture?
Keep the original, record capture context and use controlled copies with appropriate access.
20. What can you conclude from packets versus what remains uncertain?
State observed exchanges, failures and timing separately from hypotheses about cause or intent.
Capstone and assessment
Analyse a sample connection failure or slow exchange. Submit filters, packet references, timing measurements, plausible causes and the next evidence needed; do not claim a firewall cause from missing replies alone.
Capstone mein evidence, reasoning aur verified result do. Jo cheez available nahin us ki limitation likho. Lab work ko production experience keh kar present mat karo.
Area
Self-assessment target
Evidence and technical accuracy
All key claims supported by relevant records, outputs or diagrams
Investigation reasoning
At least one alternative explanation tested; gaps clearly identified
Practical delivery
Task outcome verified, including one negative or failure test
Communication
Explain the case in two minutes and answer two unprepared follow-ups
This is a study assessment, not a vendor certification or guarantee of interview success. Repeat the task if you cannot explain why your checks were necessary.
Official references and tutorials
References provide deeper detail. Some pages are broad documentation hubs: navigate to the relevant feature and check current licensing, platform support and permissions. Guidance is paraphrased; diagrams and fictional examples are original study material.