I meant to do this, but keep forgetting:
	Can we trick nmap into thinking we have a server?
		Piece of cake
	What if it's run with -sV?
		More complicated
		We won't spend a long time on this
		But maybe we can do it with simple shell commands?

Note on routes to nowhere:
	ip route NID SubnetMask null0
	If I try it ahead of time, I'll remove this note

Note on the 2960X:
	2960 end-of-life doesn't apply to it

OSPF notes:
	Open Shortest Path First
	"gateway" = "router"
		Remember:  "router" means "anything acting as a router"
			Can include my laptop

routing protocols are used to communicate routes
	Book is careful to mention differentiate from routed protocols

We've used RIP a few times
	It's not really the current favorite

autonomous system (AS) term:
	Indicates a network controlled by one organization
	IGP, like RIP or OSPF, is used inside an AS
	BGP is used outside
	AS can have ASN assigned by IANA

Link-state routing (LSR), Interior Gateway Protocol (IGP), single AS
	There are probably more acronyms about it
	Supports IPv4 and IPv6
	Built right on top of IP, doesn't use TCP or UDP
	Sends multicast IP packets that only go one hop
		Does that make it link-layer?  Not according to wikipedia
	Supports CIDR (Classless Inter-Domain Routing)
		Classfull = Class A, B, and C (subnet mask with only 255 or 0)
		Classless = \whatever, can divide any way we like (what we've been doing)
	Uses Dijkstra's Algorithm
		Remember from last semester?  Probably not...

Link metrics for Dijkstra:
	distance, throughput, etc
	Will change under load

Simplification of routing:
	Dividing the network into areas
	Backbone:  all networks have to have this
	Stub:  Kind of a dead end
		But there are a few questions here
		Can you have a path to the Internet?
			Yes = "Not so", as in, "Not so stubby"
		Can you have a summary of the rest of the network?
			No = "Totally"
	Use cases here:
		Sorry, I don't know yet

Lab notes:
	Wendell's network ospf 1 and 2
	https://blog.certskills.com/clab521/
	https://blog.certskills.com/clab522/
	router ospf ospf_process_id
		process id?  Not like Unix PID
	router-id looks like an IPv4 address, but isn't
		"looks like" = "is usually written" or some such
	network network_id backwards_subnet_mask area area_number
		network_id:  We know that one
		backwards_subnet_mask_thing: (wildcard mask)
			Basically, compare only on 0, not 1
			I might not know an important detail here