4. Network Management Flashcards
a system the acts as an intermediary between clients and other servers, and handles requests on their behalf
proxy server
a proxy server that grants clients and servers access to the web
web proxy / HTTP proxy
What is the main purpose of a proxy server?
It isolates internal networks from external servers by downloading and storing files on behalf of clients.
blocks suspicious content that is often used for malicious purposes
content filtering
allows you to grant VPN access to users who are logging in from a remote site over the internet
VPN concentrator
standalone network devices that you can use to distribute network traffic evenly across two or more network links or computers
load balancers
provides the location and routing information for network devices
network maps
dictates network rules and provide guidelines for network conduct
network policies
combination of a floor plan and a physical network topology diagram
wiring scheme
information about the financial and contractual specifications of the hardware and software components in organization’s inventory
asset management
documentation showing how cables run through the physical network
cable management
analyzing, reviewing, and implementing any changes made on the network
change management
a minor change to a network that can be implemented easily and quickly, while disrupting few users
routine change
complex changes that can potentially disrupt the day-to-day functioning of a network, and may affect many users
non-routine change
minor or major changes that don’t adhere to the networks SOP
emergency changes
a measurement of performance of a device or system for purposes of future comparison
baseline
an Application-layer protocol that collects information from network devices, for diagnostic and maintenance purposes
Simple Network Management Protocol (SNMP)
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
SNMP agent
this SNMP version upgraded security and included the GetBulkRequest PDU for retrieving multiple requests in a single message
SNMPv2
this SNMP version offers encryption and authentication services, and is the standard current version
SNMPv3
files logged by the OS and used to record its setup configuration and changes changes made to it
system logs
files that record device changes, such as system driver updates, and software and hardware changes
general logs
files mostly used for auditing purposes, recording user activity to show which user performed which action
history logs
protocol designed to send log entries generated by a device across an IP network to a message collector
syslog
reasons for network performance optimization
- Latency
- Uptime
- Bandwidth
the ability of a network to prioritize certain network traffic, applications, and data flows to ensure a consistent level of performance
Quality of Service (QoS)
a QoS strategy that involves delaing the flow of data traffis that is designated as less important compared to other traffic streams
traffic shaping
dividing processing work over multiple devices, or multiple network links
load balancing
a design principle that calls for a system to achieve a previously determined level of performance and reliability
high availability
the mechanism thats responsible for sending content to a cache
caching engine
the capability of a computer system or network to provide continued data availability if hardware failure occurs
fault tolerance
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
Common Address Redundancy Protocol (CARP)
instrument used to test whether current is passing through a circuit
circuit tester
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
circuit certifier
used to test and access phone lines using clip wires that attach to a phone cable
butt set
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
Time-domain reflectometer (TDR)
instrument used for optical cable testing that analyzes the length of cable and locations of any faulty splices, breaks, bends, or connectors
Optical Time-Domain Reflectometer (OTDR)
instrument used to locate the ends of a run of network cable
toner probe
instrument used to check the function of ports by sending a signal from and then back to the port
loopback plug
instrument used to insure that wires inserted into a patch panel are actually punched down securely, guaranteeing a proper connection
punch down tool
a software or hardware tool that intercepts network traffic on a LAN or DSL connection, logs it, and analyzes it according to baseline specifications
network / protocol analyzer (packet sniffer)
instrument that identifies the current speeds that a cable can support and isolates cabling from network problems
network qualification tester
What is the accepted recommended temperature of server rooms?
70 - 72 degrees
