A brief history of the 2960 switch:
	https://www.cisco.com/c/en/us/support/switches/catalyst-2960-series-switches/series.html
	tl;dr:  Cisco stopped making them in 2014, the replacement is the 9200 series

So what would we want from the 9200 series?
	Some have modular uplink instead of fixed uplink
	C9200-NM-2Q (digikey link is good)
	But will that just lead to an internet connection bottleneck?

How about the 4331 router?
	End of sale Nov 7 2023
	Replacement would be an 8200 or 8300
	8300 uses an x86 processor

Alright, let's add a dumb switch loop
	Hopefully I got everything out of the closet ahead of time
	24-port netgear, two computers on it, with a loop
	We'll use wireshark to observe
	I'll just plug the projector into one of them
		Hopefully the owl will catch it ok!
		If the network stays on, it won't have to

That does mean no packet tracer today
	Actually...I could probably update the instructor machine!

So we'll start on subnets now, and I'll avoid "easy" subnetting for a while
	For regular examples
	To build familiarity!
	
Subnet mask notes:
	Alright, we pretty well went over this in Networking 1
	Most useful trick I know here:  powers of 2
		A lot of folks in CS end up with powers of 2 memorized
		We count that way for a lot of things!
			Example:  flags in vulkan
	bits are commonly used to state security
		Example:  128-bit key
	So how many possibilities are there?
		 1-bit key:    2
		 2-bit key:    4
		 3-bit key:    8
		 4-bit key:   16
		 5-bit key:   32
		 6-bit key:   64
		 7-bit key:  128
		 8-bit key:  256
		 9-bit key:  512
		10-bit key: 1024
		128-bit key: 340,282,366,920,938,463,463,374,607,431,768,211,456
	Networks and subnet mask
		network, subnet, and host parts
			subnet mask really only shows one of these divisions
		We have 32 bits total
		Subnet mask shows how many are network, and how many are host
		Can be stated two ways:
			255.255.240.0 = \20
		IPv6 always uses the \whatever notation
			The other notation would get pretty nutty
	supernetting vs. subnetting:
		192.168.whatever is a class C local, as in, a /24
		What if we wanted a /22 instead?
	Alright, we're on 192.168
		Let's supernet it!
		1.  Set up a machine on 192.168.17.something
		2.  Observe that it can't communicate with anything else
		3.  Change the subnet mask on that plus another, and see if they can talk
		4.  Learn whatever lesson results from whatever result we get

Network+ Exam Notes:
	I made Networking 1 a fairly general class on how networks work
		The Network+ exam will ask a lot of what I've been calling "trivia"
		It's not trivial if you need it!
	Why would you need to know ports, acronyms, etc?
		Fluency and speed with this stuff
		I do have programmers memorize a few things too
			Like common data types
		But primarily I teach programmers to understand how computers work
			And rely on documentation for function parameters and such
	Anyway, it's not up to me what's on the Network+ or CCNA exams
		So how can we memorize this stuff?
	Ports:
		Let's revisit the table
		Maybe I should talk about one port at the start of each class?
	Acronyms:
		We need to learn these (how?)
	CCNA vs. Network+ and OSI model:
		Chapter 1 of the CCNA book minimizes OSI
		But it sounds like the Network+ doesn't
	This whole section is a bit of a soup
		I'll try to bring some order to it later

Lab next time:
	Set up a bonded channel between two switches (in packet tracer)
	Set up some kind of configuration where the bonded channel might make sense
	Try deleting one of the links - see what happens