CHAPTER 15

What performance optimization technology involves a network appliance that can receive a copy of content stored elsewhere (for example, a video presentation located on a server at a corporate headquarters) and serves that content to local clients, thus reducing the bandwidth burden on an IP WAN?

LACPW

Which of the following statements is true regarding backups?

-A differential backup includes all data that has changed since the last full backup -An incremental backup is incomplete for full recovery without a full backup and all incremental backups since the last full backup -A full backup is the safest and most comprehensive way to ensure all data availability, but it can be time-consuming and costly

If a network has the five nines of availability, how much downtime does it experience per year?

5 minutes

Power Distribution Unit (PDU)

A device fitted with multiple outputs designed to distribute electric power, especially to racks of computers and networking equipment located within a data center.

Generator

A machine that converts mechanical energy into electrical energy

First Hop Redundancy Protocol (FHRP)

A protocol that permits redundancy for the Layer 3 gateway function. There are several protocols to choose from in this category.

cold site

A separate facility that does not have any computer equipment, but is a place where employees can move after a disaster

What mode of NIC redundancy has only one NIC active at this time?

Active-passive

Uninterrupted power supplies

An appliance that provides power to networking equipment in the event of a power outage.

fire suppression system

Any system designed to combat the outbreak of a fire. A fire suppression system might include an emergency alert system, fire extinguishers, emergency power-off switch, and/or a suppression agent such as a foaming chemical or water.

You are tasked with locating a backup facility for your organization to use in the event of a disaster. You have a slim budget, and the facility needs to include electricity, bathrooms, and space. Which type of recovery site suits your requirements?

Cold site

What capability of routing protocols allows them to help you use the bandwidth that you might have available in a multipathing design?

ECMP

What type of site provides a nearly identical level of service to the organization's main site, with virtually no downtime?

Hot

In order to measure high availability (HA), you need to know the average amount of time that passes between hardware component failures. What is this called?

MTBF

What type of backup solution is point-in-time, read-only copy of data?

Snapshot

HVAC (Heating, Ventilation and Air Conditioning)

Systems that provide and regulate heating and cooling.

Recovery Time Objective (RTO)

The time in the future when an organization expects to restore availability after some failure (or even disaster) has rendered IT services unavailable/

Recovery Point Objective (RPO)

The point in time to which an organization can recover a network.

Mean Time Between Failures (MTBF)

The predicted elapsed time between inherent failures in a mechanical system.

Mean Time to Repair (MTTR)

The predicted time it takes to repair a network or network object.

Multipathing

The process of creating multiple paths that data can take in a network. Routing protocols can make these multiple paths very valuable to use since they can engage in.

Load balancing

The process of distributing data transfer activity evenly so that no single device is overwhelmed.

Network Interface Card (NIC) teaming

This technology permits multiple network interface cards to function as a single interface to the network. NIC teaming provides excellent redundancy.