Midterm Review for Cyb252

Midterm Review Guide

Midterm content should include:

DNS
TCP and UDP, reasons for each, not details of sliding window and such
IPv4 (we haven't talked about IPv6 this semester)
Routers! Static routes, funny puzzles with IP addressing and/or routing, etc
802.3 (Ethernet) (really, about anything about ethernet is ok, remember this is a family with a bunch of different standards over different physical media)
Switches, both layer 2 and layer 3, vlans, spanning tree, port modes
Cables such as need for crossover on historical equipment, bandwidth of things related to ethernet

Format

You can bring notes. As many notes as you want to create are allowed. But you can't bring the book, because you didn't write it as your test notes. You don't have to use microscopic font this way. Notes from other sources like Wikipedia aren't allowed.

One page of general multiple choice (24 points)
Short answer for the rest of the test, could include drawing a little network.

Sample Questions

Here are a few things I think would be a decent question

About how many packets would you need to do a DNS query on TCP? Does this seem like a potential reason that DNS uses UDP instead of TCP?
Suppose you can't ping isoptera.lcsc.edu, but happen to remember the IP, and can ping that. What is probably broken?
How much does a new managed 48-port gigabit switch cost? ($10, $1,000, $10,000, $100,000, $1,000,000)
How long ago was the 2960 switch released? (1 year, 3 year, 15 years, 30 years, 40 years)
Suppose there is a part of the network you're setting up where you think people will cause various problems such as broadcast storms, because they're in a CS class. This part isn't plugged into one switch, just a couple ports of each. What feature should you use to isolate it?
Suppose a network is divided into two vlans. You wish it wasn't, but aren't the administrator. Looking in the networking closet, you notice a link on the switch that isn't active in the current spanning tree, because if you unplug it, everything still works. Plugging this into your laptop, what kind of mode do you hope the port is set to? How will this grant the ability to route traffic between vlans?