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Network+ > Network Operations > Flashcards

Network Operations Flashcards

1
Q

Device/Chassis sensors

A

Abnormal values can signal a problem

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2
Q

Bandwidth

A

Amount of network use over time.
Excessive bandwidth could signal lack of available space, etc.

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3
Q

Latency

A

A delay between request and response.
High latency signals a problem.

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4
Q

Jitter

A

The time between frames. Excessive jitter can cause choppy calls/video.

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5
Q

SNMP

A

Simple Network Management Protocol.
On a network, devices run an SNMP Agent that responds to queries (or just sends information to) from an SNMP Manager (a server).

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6
Q

SNMP Traps

A
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7
Q

SNMP OIDs

A

Object Identifiers. Statistics about devices, example: How many bytes have gone into a router interface?

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8
Q

SNMP MIBs

A

Management Information Bases. A database of information that you can query for info (MIB II). Some proprietary MIBs also exist.

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9
Q

Syslog

A

Message logging protocol that creates a consolidated log. Stored in a central logging receiver (SIEM)

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10
Q

Logging Levels/Severity Levels

A
  1. Emergency
  2. Critical
  3. Major
  4. Minor
  5. Warning
  6. Notice
  7. Info
  8. Trace
  9. Debug
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11
Q

Speed/Duplex

A

Must match on both ends of a link.

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12
Q

CRC errors

A

Typically caused by bad cable or interface.

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13
Q

Giants

A

Frames that are more than 1518 bytes (when not using jumbo frames). Can indicate a communication problem.

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14
Q

Runts

A

Frames that are less than 64 bytes - can be the result of a collision.

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15
Q

Encapsulation Errors

A

Mismatch between switch tagging configurations (ISL / 801.2Q)

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16
Q

Netflow Data

A

Gathers traffic statistics from all traffic flows. Consists of a probe and a collector. The probe collects data and sends it to the collector.

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17
Q

Change Management

A

Clear policies to document a change to a device/ configuration, etc.

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18
Q

Incident Response Plan

A

How to respond to security incidents:
Preparation
Detection/Analysis
Containment, Eradication, and Recovery
Post-Incident Activity

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19
Q

Disaster Recovery Plan

A

How to keep things going after/during a disaster.

20
Q

Business Continuity Plan

A

Can involve manual/physical methods of doing things instead of using a computer

21
Q

System Life Cycle

A

Must include managing asset disposal (can data be kept? should it be kept? how to make sure it can’t be stolen)

22
Q

AUP

A

Acceptable Use Policy
Determines what is the acceptable use of company assets (Internet, telephones, computers, mobile devices). Used to limit legal liability

23
Q

DLP

A

Data Loss Prevention looks for sensitive data and blocks it from leaving the company network.

24
Q

Floor Plans

A

Overlays the wired and wireless network with existing architectural layout.
Can also be useful for patch panel labels to associate a desk with a number.

25
Q

Physical Network Map

A

Shows how each physical device is connected to the others (physical wires and devices). Can include rack locations.

26
Q

Distribution frame

A

Passive cable termination with punch down blocks or patch panels.

27
Q

MDF

A

Main Distribution Frame - central point of the network; termination point for WAN links.

28
Q

IDF

A

Intermediate Distribution Frame - an extension of the MDF (for places with multiple floors, etc.)

29
Q

Logical Network maps

A

Gives you an overall view of connectivity for an organization. Shows WAN layout, application flows, etc.

30
Q

Site Survey

A

Samples wireless landscape of an area. Allows you to configure WAPs to avoid interference.

31
Q

Cold Site

A

(Recovery site) An empty building; no data, no hardware, no people, etc.

32
Q

Hot Site

A

An exact copy of your existing data center. Automated replication of data. Duplicate hardware, etc.

33
Q

Warm Site

A

Just enough to get going in event of a disaster.

34
Q

Cloud Site

A

Some cloud providers can provide resources for recovery processes.

35
Q

Active-passive redundancy

A

Two devices are installed and configured, but only one is operating at a time.

36
Q

Active-Active redundancy

A

Both devices are active at the same time.

37
Q

Diverse paths

A

Creating multiple paths for data to follow (example: more than one ISP)

38
Q

FHRP

A

First Hop Redundancy Protocol. Allows a router to take over as the default gateway if the default one fails.

39
Q

VRRP

A

Virtual Router Redundancy Protocol. The “default” router is a virtual machine.

40
Q

RTO

A

Recovery Time Objective. How long until it’s up and running

41
Q

RPO

A

Recovery Point Objective. How much data loss is acceptable, etc.

42
Q

Full backup

A

All files are backed up

43
Q

Differential backup

A

All files that have changed since the last FULL BACKUP are backed up.

44
Q

Incremental backup

A

All files that have changed since the last INCREMENTAL BACKUP are backed up. Leads to longer recovery times since the data must be reconstituted from the full backup + all incremental backups.

45
Q

Protocol analyzer

A

A tool used to analyze traffic in a network. It allows you to view frame contents.

Network+ (5 decks)

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