Chapter 11 - Network Performance and Recovery

B

A snapshot is most similar to which type of backup scheme? A. differential backup B. incremental backup C. versioned backup D. full backup

false

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

C

At what point is a packet considered to be a giant? A. It becomes a giant once a VLAN tag is added. B. It becomes a giant only when fragmented pieces are reassembled and the packet size is too large. C. It becomes a giant when it exceeds the medium's maximum packet size. D. It becomes a giant when it exceeds 1500 bytes.

false

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

B

The Link Aggregation Control Protocol was initially defined by what IEEE standard? A. IEEE 802.3bd B. IEEE 802.3ad C. IEEE 802.3af D. IEEE 802.1cd

true

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

B

How does a line conditioning UPS protect network equipment? A. It shields equipment from lightning damage. B. It filters line noise from incoming power. C. It reduces fluctuations in incoming voltage. D. It protects against electrical surges.

A

If you wish to maintain a "4 nines" availability rating, what is the maximum amount of down time you can have per day? A. 8 seconds B. 14 minutes, 23 seconds C. .4 seconds D. 1 minute, 26 seconds

D

In planning for disaster recovery, what is the ultimate goal? A. The protection of infrastructure. B. The management of damage. C. The preservation of critical data. D. The continuation of business.

true

Most UNIX and Linux desktop operating systems provide a GUI application for easily viewing and filtering the information in system logs.

B

Once a device has failed, what metric measures the average amount of time to repair? A. mean restoration time (MRT) B. mean time to repair (MTTR) C. mean time to restore (MTTR) D. mean field replacement time (MFRT)

C

Packets that are smaller than a medium's minimum packet size are known by what term below? A. jabbers B. ghosts C. runts D. giants

true

The SNMP version 3 protocol introduces authentication, validation, and encryption for messages exchanged between devices and the network management console.

D

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

What Storage Area Network (SAN) protocol runs on top of TCP, and can be used on an existing twisted-pair Ethernet network, while maintaining low cost? A. Fibre Channel over Ethernet (FCoE) B. InfiniBand (IB) C. Fibre Channel (FC) D. Internet SCSI (iSCSI)

A

What does the Common Address Redundancy Protocol do? A. It allows a pool of computers or interfaces to share the same IP address. B. It allows a pool of computers or interfaces to share the same MAC address. C. It allows multiple devices to share the same fully qualified domain name. D. It allows multiple devices to share hardware resources.

C

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

C

What is distributed switching? A. It is a single physical switch that is partitioned in software to perform as multiple switches. B. It is multiple switches that provide redundancy switching for all switches in the group. C. It is a single distributed vSwitch that can service VMs across multiple hosts. D. It is when multiple physical switches are configured to act as a single switch.

D

What makes up the first 6 bits of the 8-bit DiffServ field? A. Priority Code Point (PCP) B. Class of Service (CoS) C. Forward Error Correction (FEC) D. Differentiated Services Code Point (DSCP)

B

What statement regarding the use of a network attached storage device is accurate? A. A NAS does not contain its own file system, rather it relies on the host file system provided by individual clients. B. A NAS can be easily expanded without interrupting service. C. A NAS can typically only support RAID-0 configurations. D. A NAS reads and writes from its disks significantly slower than other types of servers.

C

What term is used to describe the average amount of time that will pass for a device before a failure is expected to occur? A. product cycle lifetime (PCL) B. estimated time to failure (ETTF) C. mean time between failures (MTBF) D. maximum time available (MTA)

D

When Comcast was found to be interfering with BitTorrent traffic, what method was being used? A. Comcast was creating access lists that blocked known BitTorrent trackers. B. Comcast used DNS poisoning to prevent clients from talking to other BitTorrent users. C. Comcast used IP spoofing to impersonate other BitTorrent clients, then dropped traffic. D. Comcast was interjecting TCP segments with the RST (reset) field set.

D

When a device handles electrical signals improperly, usually resulting from a bad NIC, it is referred to by what term below? A. talker B. blabber C. ghost D. jabber

D

When using DiffServ, what type of forwarding utilizes a minimum departure rate from a given node, which is then assigned to each data stream? A. assured forwarding B. scaled forwarding C. prioritized forwarding D. expedited forwarding

B

When using SNMP with TLS, what port do agents receive requests on? A. 162 B. 10161 C. 161 D. 10162

B

When viewing a syslog message, what does a level of 0 indicate? A. The message is a warning condition on the system. B. The message is an emergency situation on the system. C. The message is an error condition on the system. D. The message represents debug information.

false

A RAID 5 configuration requires a minimum of two hard disks to operate.

true

A brownout is a momentary decrease in voltage; also known as a sag.

A

A differential backup covers what data on a system? A. It includes data that has changed since the last full backup. B. It includes data that has changed since the last incremental backup. C. It includes all data every time it is performed. D. It includes only data that has changed since the last backup.

B

A highly available server is available what percentage of the time? A. 99.99% B. 99.999% C. 90% D. 99%

false

A hot site consists of computers, devices, and connectivity necessary to rebuild a network exist, but without appropriate configuration.

B

A network TAP serves what purpose on a network? A. It serves as a miniature firewall that can be placed in front of any connection. B. It provides a mirrored port for monitoring traffic between other ports. C. It provides wireless monitoring capabilities, as well as spectrum analysis. D. It monitors network throughput at a specific point in the network.

A

Each managed object on a managed device using SNMP is assigned which of the following? A. object identifier (OID) B. TCP/UDP port C. inode number D. process ID

C

The grouping of multiple servers so that they appear as a single device to the rest of the network is known as which term? A. server overloading B. load balancing C. clustering D. link aggregating

B

Which of the following statements describes a RAID 0 configuration? A. In a RAID 0, data is striped across three or more drives, with parity information added to the data. B. In a RAID 0, data is striped across multiple disks to improve performance. C. In a RAID 0, data is mirrored on multiple disks to provide fault tolerance. D. In a RAID 0, four or more disks are used to mirror data within each pair of disks, and then striped to multiple pairs of disks.

D

Which type of backup scheme only covers data that has changed since the last backup? A. full backup B. differential backup C. snapshot backup D. incremental backup

C

Which type of uninterruptible power supply uses AC power to continuously charge its battery, while also providing power to devices through the battery? A. line conditioning UPS B. surge UPS C. online UPS D. standby UPS

true

Wireshark or any other monitoring software running on a single computer connected to a switch doesn't see all the traffic on a network, but only the traffic the switch sends to it, which includes broadcast traffic and traffic specifically addressed to the computer.

D

You are attempting to determine how available your Linux systems are, and need to find the current system uptime. What command should you use? A. show runtime B. display stats C. lastboot D. uptime

true

You can find out where various logs are kept on some UNIX and Linux systems by viewing the /etc/syslog.conf or /etc/rsyslog.conf files.