Network+ Domain 3: Network Operations

Low Humidity Effects

Can result in electrostatic discharge and condensation.

Differential Backup

Backs up only files changed since last full backup.

Humidity Control

To reduce issues, add a de-humidifier to the server room.

Transmission Confirmation

An agent sends an alert to the manager for confirmation.

Community String

Identifies devices under the same administrative control.

Trunk Port Connection

Connecting switches with a straight-through UTP cable.

Business Continuity Planning

Minimize risk of delays and maintain operations during failures.

Packet Sniffer Issue

Capture traffic by connecting Hosts A and B through a hub.

RJ45 Wall Jacks Location

Found in wiring schematic for intermediate distribution closet.

Data Center Security

Install biometric lock and racks with locking doors.

Local Security Policy

Set password length and account lockout policies.

Fire Suppression

Use CO2 or FM200 to suppress electrical fires.

Account Restrictions

Configure day/time restrictions in user accounts.

Error Rate Calculation

Measures how often bits are damaged in transit.

Power Deviation Length

Surge is the longest power deviation.

Baseline Establishment

Establish baselines within a network's first week.

Packet Arrival Order Issue

Different speeds cause packets to arrive out of order, leading to jitter.

Cache Poisoning Log

Check DNS logs to determine cache poisoning or spoofing.

CPU Temperature Check

Check in BIOS for CPU temperature monitoring.

Cable Movement Documentation

Update wiring schematic after moving cables.

Bandwidth Monitoring

First establish a baseline to monitor bandwidth usage.

Component Layout Diagram

Floor plan provides layout of all wiring and components.

Full Backup Definition

Backs up all files from a computer's file system and marks them as backed up.

Protocol Monitoring Tool

Use a packet sniffer to monitor and sort traffic by protocol.

Remote Access Authorization

Uses CHAP or MS-CHAP for authorization.

Equipment Fit Check

4U firewall can fit on the 16U wall-mounted rack.

Incremental Backup Inclusions

Backs up only files changed since last full or differential backup.

Backup Strategy for DRP

Perform a full backup once per week and an incremental backup the other days.

Power signal conditions

Prevents over-voltages and maintains voltage levels

ESD prevention

Protects equipment from electrostatic discharge

Trunk port

Configured to connect switches for data transmission

Plenum cable

Cable suitable for air handling spaces to prevent fire hazards

UPS

Uninterruptible Power Supply for continuous power during outages

Throughput tester

Tool to measure actual bandwidth on a network link

Network diagram

Illustrates subnets, addresses, and routers in a network

Syslog severity level 7

Indicates a debugging message in Syslog

Virtualization servers

Servers used to create virtual instances for various applications

Packet sniffer

Tool to capture and analyze network packets for troubleshooting

MIB navigation

Uses GETNEXT messages to navigate the Management Information Base

Processor performance

CPU utilization should average around 40% in a healthy system

Email header verification

Adding X-headers to prevent email spoofing

Port mirroring

Configuring a switch to copy traffic from one port to another

Incremental backup

Backs up files with the archive bit set without resetting it

Root cause analysis

Process to identify the main reason for system issues

Change Management policy

Outlines the process before implementing new network devices

SNMP security enhancement

Taking steps to increase security when using SNMP for monitoring

Hot aisle

Area where heat is sent out in equipment cooling systems

Promiscuous mode

Configuration to capture all network traffic on an interface

T568A standard

Identifies the wiring standard used in network drop cables

Firewall port status

Check baseline configurations to verify open or closed ports

Fastest data restoration

Restoring full backup from Sunday and last incremental backup

SNMP Version 3

Enhanced SNMP with agent and manager authentication, message encryption

SSL

Secure communication protocol combined with SNMP

SSH

Secure alternative to SNMP for network management

RADIUS

Authentication, authorization, and accounting solution

Load Balancer

Device distributing client requests to servers

OID

Identifies devices under the same administrative control in SNMP

Inverter

Converts DC power from batteries to AC for data center devices

Web Server Logs

Logs indicating user login times and locations

Packet Sniffer

Tool to examine individual frames sent to a firewall

Granular Password Policy

Policy enforcing longer passwords for specific users

Hot and Cold Aisles

Configuration to manage server room temperature

Change Documentation

Document to update after replacing a network cable

Incremental Backups

Backups done daily except Sunday for data recovery

Usermod and Passwd

Utilities to lock a user account

Protocol Analyzer

Device for copying frames and viewing contents

Ethernet Bonding

Solution to prevent NIC failure affecting website accessibility

Scope in BCP

Primary focus area in business continuity planning

Baseline

Tool to identify maximum simultaneous sessions a server can handle

Bottleneck

Term for system unable to meet demands placed on it

Acceptable Use Agreement

Contract specifying employee behavior regarding organization's resources

Monitoring Agreement

Outlines organization's monitoring activities

Non-Compete Agreement

Prohibits employee from working for a competitor

Acceptable Use Policy

Defines employees' rights to use company property

Least Effective Power Loss Protection

Surge protector

Ethernet Bonding Purpose

Provides failover solution, increases network performance

Rack Unit Height

1.75 inches tall

Syslog Emergency Level

Level 0

Password Policy Enforcement

Configure account policies in Group Policy

Firewall Packet Rejection Tool

Event log

Policy Document Content

Requirement for using encrypted communications

24U Rack Height

30 inches

Automatic Account Lockout

Configure account lockout policies in Group Policy

Operating System without Syslog

Windows

Latency Definition

Speed of data packets from source to destination

Trap Protocol Usage

SNMP

Event Logging Term

Trap

Data Restore Operations

Two

Traffic Identification Tool

Protocol analyzer

Computer Crashing Causes

Processor is too hot

System Image Backup Description

Contains OS, programs, drivers, user data

Interface fa0/0 Characteristics

No input or output errors, running in half-duplex mode

Reasons for Protocol Analyzer Use

Identify legacy protocols, identify slow networks

Bandwidth Definition

Amount of data transferred in a specific time

User Account Deletion Commands

userdel -r bsmith; rm -rf /home/bsmith

Backup Strategy Restore Operations

Three

Network Traffic Averages Identifier

Baseline

Non-Disclosure Agreement

Contract not to share proprietary info

Password Policy Change for Directors OU

Create a GPO linked to the Directors OU

Denial-of-Service Attack Log Examination

Security log