Chapter 11: Network Performance and Recovery
Which QoS technique operates at Layer 2 to more efficiently route Ethernet traffic between VLANs?
CoS (Class of Service)
When you arrive at work one morning, your inbox is full of messages complaining of a network slowdown. You collect a capture from your network monitor. What can you compare it to in order to determine what has changed?
A network baseline
Which type of disaster recovery site contains all the equipment you would need to get up and running again after a disaster, and yet would require several weeks to implement?
Cold site
What field in an IPv4 packet is altered to prioritize video streaming traffic over web surfing traffic?
DiffServ
Which fields are modified in IPv4 and IPv6 packets to help prioritize traffic for QoS?
Diffserv field in IPv4, Traffic Class field in IPv6
What kinds of alerts can you program your network monitor to send to IT staff when it detects specific, problematic conditions?
Email, Text messages or Support tickets can be generated
What type of adapters are required on servers in an FCoE storage network?
HBA(Host Bus Adaptors)
When shopping for a new router, what does the MTBF tell you?
How long devices like this one will last on average until the next failure
Why might you want to install two power supplies in a critical server?
In case one fails, the server won't shut down
What port do SNMP agents listen on?
Port 161
What command requests the next record in an SNMP log?
SNMP Get Next
Which of the following features of a network connection between a switch and server is not improved by link aggregation?
Speed
What are the two main categories of UPSes?
Standby and Online UPSes
What is the primary goal of disaster recovery?
The primary goal of disaster recovery is to ensure business continuity, which is the ability of the company to continue doing business with the least amount of interruption possible.
One of your coworkers downloaded several, very large video files for a special project she's working on for a new client. When you run your network monitor later this afternoon, what list will your coworker's computer likely show up on?
Top listeners
Your roommate has been hogging the bandwidth on your router lately. What feature should you configure on the router to limit the amount of bandwidth his computer can utilize at any one time?
Traffic shaping
While troubleshooting a recurring problem on your network, you will want to examine the TCP messages being exchanged between a server and a client. Which tool should you use?
WireShark
What protocol is most often used to bond ports between a switch and a busy server?
LACP (Link Aggregation Control Protocol)
What file must be accessed in order to analyze SNMP logs?
MIB (Management Information Base)
Which power backup method will continually provide power to a server if the power goes out during a thunderstorm?
Online UPS
