Module 12 Test

What's the difference between a PDU and a UPS?

A PDU (power distribution unit) is a large power strip that provides high power and monitoring for devices plugged into it and UPS is a battery-operated power source that provides power in case of a backup ment for critical systems.

What's the difference between an incident and a disaster?

An Incident is Any event, large or small, that has adverse effects on a network's availability or resources and a Disaster is an extreme type of incident, involving a network outage that affects more than a single system or limited group of users.

Which QoS technique operates at layer 2 to more efficiently route Ethernet traffic between VLANs?

CoS (Class of Service)

Why might you want to install two power supplies in a critical server?

In case one fails you have a backup that can keep the critical server up and running.

Which backup type, if performed daily, would offer the lowest RTO and why?

Incremental backup because it only backs up data that has changed since the last backup.

Which congestion control techniques help to prevent network congestion?

Retransmission policy, Windows policy, Acknowledgment policy, Discarding policy, Admission policy.

What is the primary challenge in properly configuring NetFlow?

Tracking all traffic and tracking enough traffic to sufficiently observe network behavior.

A brownout is a momentary decrease in voltage; also known as a sag. True or False?

True

Link Aggregation Control Protocol was initially defined by what IEEE standard? a. IEEE 802.3af b. IEEE 802.3ad c. IEEE 802.1cd d. IEEE 802.3bd

b. IEEE 802.3ad

When a device handles electrical signals improperly, usually resulting from a bad NIC, it is referred to by what term? a. Ghost b. Jabber c. Talker d. Blabber

b. Jabber

What command requests the next record in an SNMP log? a. SNMP Get Request b. SNMP Get Next c. SNMP Trap d. SNMP Get Response

b. SNMP Get Next

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? a. Top talkers b. Top listeners c. Giants d. Jabbers

b. Top listeners

While troubleshooting a recurring problem on your network, you want to examine the TCP messages being exchanged between a server and a client. Which tool should you use on the server? a. Spiceworks b. Wireshark c. iPerf d. NetFlow

b. Wireshark

When using SNMP with TLS, what port do agents receive requests on? a. 161 b. 162 c. 10161 d. 10162

c. 10161

What makes up the first 6 bits of the 8-bit DiffServ field? a. Priority Code Point (PCP) b. Forward Error Correction (FEC) c. Differentiated Services Code Point (DSCP) d. Class of Service (CoS)

c. Differentiated Services Code Point (DSCP)

A differential backup covers what data on a system? a. It includes all data every time it is performed b. It includes only data that has changed since the last backup c. It includes data that has changed since the last full backup d. data is striped across three or more drives, with parity information added

c. It includes data that has changed since the last full backup

Packets that are smaller than a medium's minimum packet size are known by what term below? a. Jabbers b. Giants c. Runts d. Ghosts

c. Runts

Term is used to describe the average amount of time that will pass for a device before a failure is expected to occur? a. estimated time of failure (ETTF) b. maximum time available (MTA) c. Product cycle lifetime (PCL) d. Mean time between failures (MTBF)

d. Mean time between failures (MTBF)

A RAID 5 configuration requires a minimum of two hard disks to operate True or False?

False

A system with an availability of 99.999% can be down for a maximum of 52 minutes per year. True or False?

False

Setting a NIC to run in promiscuous mode will allow it to see all network traffic passing through a network switch. True or False?

False

What are the two main categories of UPSs?

Standby UPS (SPS (standby power supply)) and Online UPS.

What are the primary data link layer flow control methods?

Stop-and-wait method, Go-back-n sliding window method, and selective repeat sliding windows method

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 documentation can help you determine what has changed?

The Network Baseline

Class of Service utilizes 8 levels of priority, and modifies the PCP field in an 802.1Q tag. True or False?

True

Most UNIX and Linux desktop operating systems provide a GUI app for easily viewing/ filtering the info in system logs. True or False?

True

SNMP v3 protocol authentication, validation, encryption for messages exchanged between devices and Network Mgmt console. True or False?

True

Which power backup method will continually provide power to a server if the power goes out during a thunderstorm? a. Online UPS b. Generator c. Dual power supplies d. Standby UPS

a. Online UPS

What port do SNMP agents listen on? a. Port 161 b. Port 21 c. Port 162 d. Port 20

a. Port 161

Which of the following statements describes a RAID 0 configuration? a. RAID 0, data is striped across multiple disks to improve performance b. four or more disks to mirror data within each pair of disks, and striped c. data is striped across three or more drives, with parity information d. RAID 0, data is mirrored on multiple disks to provide fault tolerance

a. RAID 0, data is striped across multiple disks to improve performance

Which log type is used to prove who did what and when? a. Traffic log b. Audit log c. System log d. Syslog

b. Audit log

When Comcast was found to be interfering with BitTorrent traffic, what method was being used? a. Creating access lists that blocked known BitTorrent trackers b. Comcast was interjecting TCP segments with the RST (reset) field c. Used DNS poisoning to prevent clients from talking to other BitTorrent user d. IP spoofing to impersonate other BitTorrent clients, the dropped traffic

b. Comcast was interjecting TCP segments with the RST (reset) field

What happens when an NMS uses the SNMP walk command? a. Sends a request for data to the agent on a managed device b. Uses get requests to move through sequential rows in the MIB database c. The NMS requests a list of all active SNMP traps on the system d. The NMS walks through a list of given SNMP hosts

b. Uses get requests to move through sequential rows in the MIB database

Which data link layer flow control method offers the most efficient frame transmission when sending large volumes of data? a. Go-back-n sliding window b. Choke packet c. Selective repeat sliding window d. Stop-and-wait

c. Selective repeat sliding window

. In planning for disaster recovery, what is the ultimate goal? a. The preservation of critical data b. The management of damage c. The continuation of business d. The protection of infrastructure

c. The continuation of business

A highly available server is available what percentage of the time? a. 90% b. 99% c. 99.99% d. 99.999%

d. 99.999%

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? a. Warm site b. Standby site c. Hot site d. Cold site

d. Cold site

What field in a IPv4 packet is altered to prioritize video streaming traffic over web surfing traffic? a. Traffic Class b. Priority Code Point c. Time to Live d. DiffServ

d. DiffServ

What 3-bit field in a 802.1Q tag is modified to set a frame's Class of Service (CoS)? a. EtherType b. CRC checksum c. Tag Protocol Identifier (TPID) d. Priority Code Point (PCP)

d. Priority Code Point (PCP)

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? a. Power management b. Congestion control c. Flow control d. Traffic shaping

d. Traffic shaping