4. Network Management

Question 1

a system the acts as an intermediary between clients and other servers, and handles requests on their behalf

Answer 1

proxy server

Question 2

a proxy server that grants clients and servers access to the web

Answer 2

web proxy / HTTP proxy

Question 3

What is the main purpose of a proxy server?

Answer 3

It isolates internal networks from external servers by downloading and storing files on behalf of clients.

Question 4

blocks suspicious content that is often used for malicious purposes

Answer 4

content filtering

Question 5

allows you to grant VPN access to users who are logging in from a remote site over the internet

Answer 5

VPN concentrator

Question 6

standalone network devices that you can use to distribute network traffic evenly across two or more network links or computers

Answer 6

load balancers

Question 7

provides the location and routing information for network devices

Answer 7

network maps

Question 8

dictates network rules and provide guidelines for network conduct

Answer 8

network policies

Question 9

combination of a floor plan and a physical network topology diagram

Answer 9

wiring scheme

Question 10

information about the financial and contractual specifications of the hardware and software components in organization’s inventory

Answer 10

asset management

Question 11

documentation showing how cables run through the physical network

Answer 11

cable management

Question 12

analyzing, reviewing, and implementing any changes made on the network

Answer 12

change management

Question 13

a minor change to a network that can be implemented easily and quickly, while disrupting few users

Answer 13

routine change

Question 14

complex changes that can potentially disrupt the day-to-day functioning of a network, and may affect many users

Answer 14

non-routine change

Question 15

minor or major changes that don’t adhere to the networks SOP

Answer 15

emergency changes

Question 16

a measurement of performance of a device or system for purposes of future comparison

Answer 16

baseline

Question 17

an Application-layer protocol that collects information from network devices, for diagnostic and maintenance purposes

Answer 17

Simple Network Management Protocol (SNMP)

Question 18

a software module that is responsible for gathering information about a device and delivering it to a computer that has been designated as the network management console

Answer 18

SNMP agent

Question 19

this SNMP version upgraded security and included the GetBulkRequest PDU for retrieving multiple requests in a single message

Answer 19

SNMPv2

Question 20

this SNMP version offers encryption and authentication services, and is the standard current version

Answer 20

SNMPv3

Question 21

files logged by the OS and used to record its setup configuration and changes changes made to it

Answer 21

system logs

Question 22

files that record device changes, such as system driver updates, and software and hardware changes

Answer 22

general logs

Question 23

files mostly used for auditing purposes, recording user activity to show which user performed which action

Answer 23

history logs

Question 24

protocol designed to send log entries generated by a device across an IP network to a message collector

Answer 24

syslog

Question 25

reasons for network performance optimization

Answer 25

1. Latency
2. Uptime
3. Bandwidth

Question 26

the ability of a network to prioritize certain network traffic, applications, and data flows to ensure a consistent level of performance

Answer 26

Quality of Service (QoS)

Question 27

a QoS strategy that involves delaing the flow of data traffis that is designated as less important compared to other traffic streams

Answer 27

traffic shaping

Question 28

dividing processing work over multiple devices, or multiple network links

Answer 28

load balancing

Question 29

a design principle that calls for a system to achieve a previously determined level of performance and reliability

Answer 29

high availability

Question 30

the mechanism thats responsible for sending content to a cache

Answer 30

caching engine

Question 31

the capability of a computer system or network to provide continued data availability if hardware failure occurs

Answer 31

fault tolerance

Question 32

protocol that allows multiple computers to use a single VNIC; if the master computer fails, another computer automatically takes over. this reduces downtime and implements redundancy

Answer 32

Common Address Redundancy Protocol (CARP)

Question 33

instrument used to test whether current is passing through a circuit

Answer 33

circuit tester

Question 34

instrument used to test cables for shorts, crosstalk or opens, and tests the cable type. you can also check a NIC for function and type

Answer 34

circuit certifier

Question 35

used to test and access phone lines using clip wires that attach to a phone cable

Answer 35

butt set

Question 36

instrument used to check for cable imperfections by sending an electrical pulse down a cable, then measuring the time it takes and the condition of the returning signal

Answer 36

Time-domain reflectometer (TDR)

Question 37

instrument used for optical cable testing that analyzes the length of cable and locations of any faulty splices, breaks, bends, or connectors

Answer 37

Optical Time-Domain Reflectometer (OTDR)

Question 38

instrument used to locate the ends of a run of network cable

Answer 38

toner probe

Question 39

instrument used to check the function of ports by sending a signal from and then back to the port

Answer 39

loopback plug

Question 40

instrument used to insure that wires inserted into a patch panel are actually punched down securely, guaranteeing a proper connection

Answer 40

punch down tool

Question 41

a software or hardware tool that intercepts network traffic on a LAN or DSL connection, logs it, and analyzes it according to baseline specifications

Answer 41

network / protocol analyzer (packet sniffer)

Question 42

instrument that identifies the current speeds that a cable can support and isolates cabling from network problems

Answer 42

network qualification tester

Question 43

What is the accepted recommended temperature of server rooms?

Answer 43

70 - 72 degrees