Levels of Abstraction
At its core
Business
Geography
Hova?
It's Okay
100

Dealing with the carrier or media on (over) which a message travels

What is the Physical Layer

100
It acts as a member of 2 collision domains, serving as a conduit when members on either side want to reach PCs the other side

What is a Switch

100

This type of company provides connectivity to subscribers in a geography

What is an Internet Service Provider (ISP)

100

.org, .gov, .net, .com, .edu, .hu, and .io are all examples

What is a top level domain

100

A term that is easier for humans to recall versus the actual numeric value assigned as its address

What is a Uniform Resource Locator (URL)

100

This feature enables TCP packets that might arrive out of order to be reassembled correctly

What does the TCP sequence number do

200

Managing MAC addresses, handling collision detection and exponential backoff, and reporting issues

What is the Data Link Layer

200
It consists of a header that says its intended destination and a data segment

What is a packet

200

A network that runs atop another network and can hide or restrict others from knowing endpoints and reading messages

What is a Virtual Private Network (VPN)

200

The "meet" in "meet.google.com" is an example

What is a subdomain

200
The standard term that describes the source and destination of a message

What is an endpoint

200

This protocol is used when the recipient is unconcerned about packet loss and might appear glitchy

What is UDP

300

Managing the switching and routing

What is the Network Layer

300

The standard that Xerox defined in 1970 for set for addressing, routing, and fowarding messages over a shared cable (wire)

What is "Internet Protocol" (IP)

300

The segment of an IP packet that contains the "data" portion of the message

What is the Data Payload

300

The webservice that translates URLs into IP Addresses

What is a Domain Name Server (DNS)

300

The internal address within a PC that an application listens to for communications from the outside world

What is a port number

300

This technique confirms that all the raw data is correct by summing its binary values

What is a checksum

400

Dealing with point-to-point communications, figuring out addresses, signaling apps via particular port #s

What is the Transport Layer

400

TCP and UDP are the best-known of the layers that run atop it.

What runs atop "Internet Protocol" (IP)

400

The Palo Alto company pioneered networking computers as well as becoming a household name for photocopying

Who/what is Xerox

400

Referred to as a super-highway, it is formed from gigantic routers with enormous bandwidth and message storage capacity, stretching for miles

What is a backbone

400

A free program found on Linux, Mac O/S, and Windows that can show the path a packet travels between endpoints

What is Tracert

400

In TCP, if the sender does NOT receive this, it will resend that particular packet

What is (the purpose of) an Acknowledgement (ACK) packet

500

Managing the overall conversation between 2 endpoints and detecting if either side is an imposter.

What is the Session Layer

500

In addition to its expected contents, this sub-segment supplies the port# & checksum

What else would one find in the UDP Data Payload segment

500

Founded in the 1920s, this company developed equipment for business including typewriters, cash registers and card tabulators.

Who is IBM

500

As of 2017 (when the episode was made), there were over 300 million of them.

How may domain names were there in 2017?

500

Jay Z

The artist with the nickname "Hova"

500

The term used to describe a system's ability to keep going even if part of it is injured

What is fault tolerance

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