Data & Dev with Jon and Mel

What's on the agenda!?

Cockroach Labs

Jon and Mel talk about what TCP and IP are. How they work. And why they are important.

Show notes:

Intro

Traffic rules and Internet rules

Terms du jour: 3-way handshake, encapsulation, in order delivery, reliability, flow control

What does TCP stand for and what is its job?

What does IP stand for and what is its job?

Lego masterpieces to send data over internet

Furniture Manufacturer analogy

How does 3-way handshake work?

How does TCP ensures reliable and  in-order delivery

IP - what it does and how it does it?

IP utilizes encapsulation

Routing tables

Road trips and Internet routing

TCP/IP have survived since the beginning of the internet

Tune in for the second half of our interview with Marwan! You won't be disappointed.

Show notes:

The resilience of TCP/IP - how have they survived this long?

The evolving of TCP/IP

About the IP layer

* addressing

* routing and forwarding

* but no guarantee

UDP - “best effort"

TCP layer

* reliability / guaranteed delivery

* flow control

* congestion control

TCP fairness

TCP & congestion control in streaming video

About Marwan

Professional mistake: looking for shortcuts

Advice to someone just starting in tech

Our first interview of the season. 

The accomplished and ever so humble, Marwan Fayed, joins us today.

Find him at St. Andrews or at Cloudflare.

Timstamps:

0:00 - Intro

1:56 - Interview; Marwan Introduction

2:16 - Role at Cloudflare

4:25 - Community Broadband ISP

5:56 - Industry vs. Academia

7:08 - Day to Day at current role

8:56 - What does an industry lab look like?

10:45 - Security and Privacy research prioritized at Cloudflare

11:31 - What is TLS 1.3

14:26 - Research at Cloudflare

15:09 - Oblivious DNS over HTTPS (ODOH)

17:56 - More on privacy

21:51 - Where does a research idea come from

23:41 - Humility matters in research

25:37 - 2 guiding principles of research

26:11 - Marwan’s lightbulb moment

30:31 - Overlap between reserach and business

31:21 - Community Broadband ISP

33:56 - “No one gets fired for hiring IBM”

36:21 - Backhaul internet

41:06 - Biggest challenges were people, not technology

43:25 - Goodbye

Jon and Mel dive into the question of the day: "When I open the weather app on my phone, how do today's weather get my screen, and where did it come from?

Timestamps:

0:00 - Intro

0:18 - Question of the day

1:48 - Defining the endpoints? Client and Server

2:43 - Mental picture for information traveling across internet: Skateboard ramp.  Swimming pool

5:00 - Defining some terms: client and server

5:36 - Defining request and response 

6:28 - Everything is binary

7:53 - Application Layer

8:55 - Physical layer 

10:33 - Defining a 'session’

11:00 - Transport layer. TCP

12:00 - Network layer. IP.

12:44 - Each layer is distinct and independent

14:05 - What type of requests can I make?

16:55 - Looking at the POST and GET requests

18:00 - Packets

20:45 - TCP & IP roles 

21:40 - Each device has its own IP address 

22:40 - Review of the path of a request from client to server

23:40 - Short hops along the path

25:30 - More about packets and network layers

26:30 - Encapsulation

29:00 - Terms for the data at different network layers

29:45 - Real-time routing

31:20 - Internet travel is like note passing in class

Question for the day: "When I send an email, how does that email get from my email to yours?”

Timestamps

0:00 - Intro

0:35 - Post office analogy

2:20 - Post office to email connection

3:10 - Computer 'client' and ‘server’

4:05 - Addressing an email

9:00 - Email messages get broken up into packets

13:35 - DNS: Turning an email address into an IP address

16:00 - DNS servers; the phone book of the internet

20:30 - SMTP server; local post office.  Email journey is email server to email server.

25:45 - Role of MTA

29:30 - Gateways: "highway” part of the information super highway.

31:10 - How SMTP deals with lost information 

33:20 - There is no umpire for the internet

34:38 - Recap and preview for Episode 2

Terms you will hear and learn include:

Router, gateway, MTA, IP addresses, DNS, Client and Server, Packets

Two friends from elementary school kick off this tech podcast (because we need another one), aimed primarily at career changers seeking to level up quickly in the field of tech, but in the midst of the responsibilities of adult life.  

Jon is an academic turned start-up guy with Data Science expertise.

Melissa is a mid-life career changer, pursuing a second career as a Software Engineer first via a Bootcamp and currently as a CS Master's student at UPenn.

Headed your way:

Tech concepts explained so a 10-year-old can understand and lots of lame analogies.

Learn from analogy and learn from experts.

We pair the theoretical with the practical as we have about how these topics are thought about in industry.

I can't wait!