Workshop

Q About that latency analysis method: Do the analyzers need to have synchronized clocks?
A No, that’s the cool thing about this method. You’re taking the total trip time differences on both ends.
Because the difference between the differences has to be the total amount of time the packet spends in
the switch or router going both ways, you divide that number by 2 to get the latency for a one-way trip.
Quiz
1. You install a new virus protection application on one of your servers. Instantly, you’re
bombarded with complaints that the network in your building has slowed to a crawl. What should
you do next?
A. Run a network analyzer on your segment
B. Deny everything
C. Uninstall the new application
D. Power down the server
2. Application throughput can be found by dividing the ___________ by the ____________.
A. number of workstations, number of routers
B. total bytes transmitted, time elapsed
C. total bytes transmitted, workstations involved
D. number of workstations, time elapsed
3. 10Mbps Ethernet is about ________ times faster than a T1 leased line.
A. 5
B. 2
C. 1
D. 100
4. Major slowdowns can occur when _________ or __________ is not used by a network
application.
A. packet burst, sliding windows
B. packet windows, sliding burst
C. windows defenestration, burst appendix
D. windows burst, sliding packets
5. What’s the slowest kind of memory on any server?
A. Amnesiac memory
B. Cache memory
C. Dynamic memory
D. Virtual memory
6. What constitutes a “disk-bound” application?
A. When the limiting factor is how fast the disk can go
B. When the application is strapped to the hard drive
C. When the disk is going as fast as it can
D. None of the above
7. When does “oversubscription” occur?
A. When a provider has more bandwidth coming in than going out