Lecture Notes + Self Study Assignments Computer Networks (CN) Year 1 (2022/2023) Computer Science and Engineering at TU Delft Topics 1 Introduction 2 Data Link Layer 3 MAC SubLayer 4 Network Layer 5 Transport Layer 6 Application Layer 7 Security + Self Study Assignments 1 Error Detection and Correc...
Topics + Self Study Assignments - Computer Networks CSE1405
CSE TU Delft - Lieke Sanders
Topic 1 - Introduction
Topic 2 - Data Link Layer
Topic 3 - MAC SubLayer
Topic 4 - Network Layer
Topic 5 - Transport Layer
Topic 6 - Application Layer
Topic 7 - Security
Self Study Assignment 1 - Error Detection and Correction
Self Study Assignment 2 - Cryptography
,Topic 1 - Introduction
Lecture 1
Tor = hides your identity (IP address) on the web
Obtaining relays
1 Publicly available list (default) (blocked)
- Download and choose randomly
- Easy to block
2 Private relays (bridges) (not all blocked)
- Set of relays not included in public list
- Changed frequently
- Can be requested (for example, by email)
- Only give out small number, not complete list
Protocols
- Algorithm for communication between two or more parties
- Defines the rules of communication
- Provides a service (function signature)
,Layers
There are layers in protocols that provide levels of abstraction, because every layer provides
a service that is only communicated to the layer above or below
Network layers are often the same layers on multiple machines, and only the lowest one
actually communicates
, Physical layer
Sends one bit via a physical medium like an ethernet cable
Data link layer
Sends a sequence of bits over a link reliably, like a phone sending data to a wifi router. Here,
reliability is needed, so there needs to be something in place to ensure that the data is sent
correctly
Network layer
Sends data from one computer in a network to another
Transport layer
Sends data in a reliable or unreliable way over an unreliable network
Application layer
Sends application-specific information over the network
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller liekesanders. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.75. You're not tied to anything after your purchase.
