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Cheat SheetCNGATE CS 2027

Computer Networks Cheat Sheet Pack

Fast Revision · Formulas · Traps · Visual Recall

Delays and switching, CRC and CSMA/CD, sliding windows, subnetting and CIDR, fragmentation, routing, TCP congestion traces, DNS and HTTP.

  • 12 A4 pagesone topic per page
  • PDF (A4)Version 1.0.2
  • Screen editionPhones, tablets, laptops
  • Print editionPrepared for A4 printing

₹29Regular price ₹39Launch price

Launch price: ₹29 instead of the regular ₹39.

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3 of 12 pages shown as images. The purchased PDF is sharper, searchable and has clickable bookmarks.

Page 1 of 12

What is inside

12 pages, one purpose each

  1. p. 1Cover, contents and how to useThe page map, a key to every box type, and the order to read on the last day.
  2. CN-02Layering, Switching and Performance MetricsPlace each job in its layer, then cost a transfer as transmission, propagation and queueing time
  3. CN-03Data Link: Error Detection, MAC and EthernetDivide for CRC, size a collision-safe frame, and know the Ethernet limits
  4. CN-04Sliding Window: Efficiency and Sequence BitsCompute a, the window that fills the pipe, and the sequence bits each protocol needs
  5. CN-05IPv4 Addressing: Subnets, CIDR and NATSplit any prefix, aggregate blocks, pick the longest match, and know what NAT rewrites
  6. CN-06IPv4 Header and FragmentationCut a datagram to fit each MTU and fill in offset, MF and length for every fragment
  7. CN-07Routing: Distance Vector and Link StateRun a Bellman-Ford update and a Dijkstra trace, and spot count-to-infinity
  8. CN-08TCP: Windows, Congestion Control and SocketsTrace cwnd round by round, size sequence numbers, and order the socket calls
  9. CN-09DNS and HTTPCount the queries, the connections and the RTTs of a page load
  10. CN-10GATE Traps SheetThe wrong turns that cost marks, each with the rule that fixes it
  11. CN-11Question Patterns and Solving ApproachRecognise the pattern in the stem, then run the matching routine
  12. CN-12Master Last-Day Revision SheetEverything to reread on the last evening, one page

How each page works

Built for fast revision

  • Quick Recall boxes: the facts to hold in memory
  • Formula boxes with variables, when each applies and the usual mistake
  • Students Think / Actually: the wrong intuition next to the correct rule
  • If You See This / Do This: a cue in the question and the steps to take
  • Compare tables for look-alike concepts
  • Trap boxes: a known wrong turn and its fix
  • Edge cases that change the answer
  • Master tables for quick lookup
  • Worked mini-examples
  • Diagrams

About this pack

Scope

Revision pages for Computer Networks in the GATE CS 2027 syllabus: layering, switching and performance metrics, error detection, MAC and Ethernet, sliding window efficiency and sequence bits, IPv4 addressing with subnets, CIDR and NAT, the IPv4 header and fragmentation, distance vector and link state routing, TCP windows, congestion control and sockets, and DNS and HTTP. Every number in the pack was verified by a script. Framing, ARP, DHCP, ICMP, SMTP, FTP and bridging are outside the 2027 text and appear only as one-line notes.

Is it right for you?

Who it is for, and how you get it

Who it is for

GATE CS 2027 candidates who have studied the subject and want fast, reliable revision: one page per sitting of about ten minutes, then the last-day sheet before the exam.

Screen edition

For phones, tablets and laptops. Clickable bookmarks jump between pages.

Print edition

The same pages prepared for A4 printing. Both editions are included.

Preparing more than one subject?Complete GATE CS Cheat Sheet CollectionAll 12 packs including Computer Networks, for ₹199 (launch price).

Before you buy

Common questions

What exactly will I receive?

A 12-page A4 PDF in two editions: a screen edition for reading on a device and a print edition prepared for A4 printing. Nothing is shipped; it is a download.

Can I read it on my phone, and can I print it?

Yes. The PDF opens in any PDF reader on phones, tablets and computers, and the bookmarks jump between pages. You may print it for your own study.

Is it for GATE 2027?

Yes. The packs follow the official GATE CS 2027 syllabus, and each pack says what is in scope and what is covered in another pack. GATE CS Mastery is independent and not affiliated with IIT, IISc or the GATE organising committee.

How is this different from ordinary short notes?

Each page answers one question and uses labelled boxes: rules with their conditions, traps with the fix, comparison tables and small worked examples. Every pack ends with a traps sheet, a question-patterns sheet and a one-page last-day sheet.

What happens after I pay?

When Razorpay confirms the payment, download buttons appear straight away and a receipt is emailed to you. Later, My library sends a one-time link to your purchase email and shows fresh download links.

What if the payment succeeds but the download fails?

Do not pay again. Your purchase is recorded as soon as the payment is verified. Open My library, or write to support@gatecsmastery.com with your order ID or Razorpay payment ID. See the refund policy for when a refund applies.