This is Powerpoint Presentation on IP addressing & Subnet masking. This presentation describes how IP address works, what its classes and how the subnet masking works and more.
L13 CSS STRUCTURED CABLING SYSTEM
At the end of this module the learners will be able to . . .
○ Describe the role of different LAN cable in computer network according to its type.
○ Explain and enumerate the different types of LAN cable and its use.
○ List the standardization organization in computer networking and structured cabling system.
○ List the evolution and characteristic of computer cabling standardization.
This is Powerpoint Presentation on IP addressing & Subnet masking. This presentation describes how IP address works, what its classes and how the subnet masking works and more.
L13 CSS STRUCTURED CABLING SYSTEM
At the end of this module the learners will be able to . . .
○ Describe the role of different LAN cable in computer network according to its type.
○ Explain and enumerate the different types of LAN cable and its use.
○ List the standardization organization in computer networking and structured cabling system.
○ List the evolution and characteristic of computer cabling standardization.
I have discussed about the common problem of network issues of a computer . How we can find out what is the bug on our network wizerd and what should we do for that perticular problem . I also discussed about the physical hardware problem and how to find out what the problem is and what is the way to find the solution for it . If you think for a problem that i am finished or my machine is finished it is your foolishness . So you can read my slides and can find out the problem and their solution .
Basic idea about router. Router configuration. This is our team project. From this slide we can learn what is router configuration and application of router. We also learn the security of router.
CSS L16 - IP ADDRESSING
Learning Competencies
After this learning module the students will be able to . . .
◦○Learn and discuss network addressing, switching and routing.
◦○Identify and understand the IP Addressing format
◦○Understand the explain the Network address translation and IPv6
CSS L11 INTRODUCTION TO COMPUTER NETWORKINGMarvin Bronoso
CSS L11 - INTRODUCTION TO COMPUTER NETWORKS
After this lesson module the student will be able to . . .
○ Understand the function of computer network.
○ Discuss how the computer network works.
○ Enumerate and explain the different devices use in computer networking.
○ Differentiate the types of computer network
Testing Network Routers for Extreme Scale and Performance Sailaja Tennati
In response to the demand for high scale test solutions validating Layer 1-3 performance, Spirent has developed a new mX2 test module series with 1G, 10G, 40G and 100G speeds providing industry-leading scale, reliability, security and realism.
In human-computer interaction, an organic user interface (OUI) is defined as a user interface with a non-flat display. After Engelbart and Sutherland's Graphical User Interface (GUI), which is based on the cathode ray tube (CRT), and Kay and Weiser's Ubiquitous Computing, which is based on the flat panel liquid-crystal display (LCD), OUI represents the third wave of display interaction paradigms, pertaining to multi-shaped and flexible displays. In an OUI, the display surface is always the locus of interaction, and may actively or passively change shape upon analog (i.e., as close to non-quantized as possible) inputs. These inputs are provided through direct physical gestures, rather than through indirect point-and-click control. The term "Organic" in OUI was derived from organic architecture, referring to the adoption of natural form to design a better fit with human ecology. The term also alludes to the use of organic electronics for this purpose.
The three design principles of OUI ar Input equals output,Function equals form and Form follows flow. Input equals output means output is generated graphically on the screen on the basis of input provided by a control device such as a mouse. Function equals form means the shape of an interface determines its physical functionality. Form follows flow indicates OUIs physically adapt to the context of a user's multiple activities
I have discussed about the common problem of network issues of a computer . How we can find out what is the bug on our network wizerd and what should we do for that perticular problem . I also discussed about the physical hardware problem and how to find out what the problem is and what is the way to find the solution for it . If you think for a problem that i am finished or my machine is finished it is your foolishness . So you can read my slides and can find out the problem and their solution .
Basic idea about router. Router configuration. This is our team project. From this slide we can learn what is router configuration and application of router. We also learn the security of router.
CSS L16 - IP ADDRESSING
Learning Competencies
After this learning module the students will be able to . . .
◦○Learn and discuss network addressing, switching and routing.
◦○Identify and understand the IP Addressing format
◦○Understand the explain the Network address translation and IPv6
CSS L11 INTRODUCTION TO COMPUTER NETWORKINGMarvin Bronoso
CSS L11 - INTRODUCTION TO COMPUTER NETWORKS
After this lesson module the student will be able to . . .
○ Understand the function of computer network.
○ Discuss how the computer network works.
○ Enumerate and explain the different devices use in computer networking.
○ Differentiate the types of computer network
Testing Network Routers for Extreme Scale and Performance Sailaja Tennati
In response to the demand for high scale test solutions validating Layer 1-3 performance, Spirent has developed a new mX2 test module series with 1G, 10G, 40G and 100G speeds providing industry-leading scale, reliability, security and realism.
In human-computer interaction, an organic user interface (OUI) is defined as a user interface with a non-flat display. After Engelbart and Sutherland's Graphical User Interface (GUI), which is based on the cathode ray tube (CRT), and Kay and Weiser's Ubiquitous Computing, which is based on the flat panel liquid-crystal display (LCD), OUI represents the third wave of display interaction paradigms, pertaining to multi-shaped and flexible displays. In an OUI, the display surface is always the locus of interaction, and may actively or passively change shape upon analog (i.e., as close to non-quantized as possible) inputs. These inputs are provided through direct physical gestures, rather than through indirect point-and-click control. The term "Organic" in OUI was derived from organic architecture, referring to the adoption of natural form to design a better fit with human ecology. The term also alludes to the use of organic electronics for this purpose.
The three design principles of OUI ar Input equals output,Function equals form and Form follows flow. Input equals output means output is generated graphically on the screen on the basis of input provided by a control device such as a mouse. Function equals form means the shape of an interface determines its physical functionality. Form follows flow indicates OUIs physically adapt to the context of a user's multiple activities
Network Network Visibility - The Key to Rapidly Troubleshooting Network Perfo...Savvius, Inc
Today's networks are high-speed, widely distributed and mission-critical, making network and application performance monitoring and troubleshooting essential, and very challenging. Oftentimes the statistical data used to compile the monitoring dashboards and reports are insufficient for performing detailed root cause analysis, driving network engineers to use multiple products from multiple vendors to perform different levels of analysis. This significantly increases the cost for IT departments to do business, in a time when budgets are already razor thin. Join us to see how one product can do it all, on all network segments, 10, 40 and even 100GbE
In this second technology focussed session from AWS Solutions Architect, Steve Bryen, we will explore techniques and tools for automating the test process and for enhancing application monitoring and management when operating at scale
These are hardware tools used in Personal Computer hardware servicing. For TLE - ICT class. grade 7,8,9. Used by my student-teacher Mrs. Paje for her Demo Teaching.
Software Assurance, LLC a Dallas-based Testing-centric Company offers specialized Mobile App Testing - We define your Mobile Apps Strategy - Faster, Better & Economically.
There are relationships among the total correlation rule to be executed, complexity of the rules and EPS values together with CPU, RAM, Disk speed.
Also one other important issue is the easy of developing complex rules with wizards and executing them with high EPS values.
This tutorial displays the list of non functional testing attributes which are helpful while build the software for any purpose. It will be definitely guide for a newbie developer or beginner to understand the concept of non functional testing.
This webinar series is designed to help internal auditors looking to equip themselves with competencies and confidence to handle audit of IT controls and information security, and learn about the emerging technologies and their underlying risks
The series focuses on contemporary IT audit approaches relevant to Internal Auditors and the processes underlying risk based IT audits.
Session 5 of 10
This Webinar focuses on Controlling Ports and Network Devices
• Ports and Protocols
• Network Mappers
• Protocol Attacks
• Use of Firewalls
• Identifying Network Boundaries
• NIST 800 framework and CIS
• Switches and Routers
• Routing Protocols
• Switch Security
• Hardening the Network
• Good Network Administration
• Internet Control Message Protocol
• Anti-spoofing and logging
• Configuring a secure network perimeter
• Secure IOS-based Routers using automated features
• Securing Desktops, Notebooks, Servers and Mobile Devices
The correlation systems consist of two parts.
1. Detection
2. Response
The response part is divided in two sub-parts as alarm and taking action.
The detection module, the response module if it detects an event.
• Sending email
• Executing a script
o Visual basic
o Batch file
o Perlscript
o Phytonscript
• Executing java code
• Running application
• Updating dynamic list. For example adding or removing IP address in forbidden IP address list. Dynamically updating this list for those who try more than 3 failed logon accesses in last week, or adding a benign IP or URL that triggered an alarm to a Whitelist so that false positives aren’t generated in the future
A network security detection and prevention
scheme using a combination of network taps
and aggregation devices can improve visibility
and redundancy, reduce system complexity
and diminish initial and continuing costs for
implementation.
DumpsCafe is a Premium Supplier of Real Exam Questions and Certification Exam Dumps. DumpsCafe.com is the ultimate choice for IT students to pass their final exams in a quick time.
Safe, Reliable, Available, High‒Integrity, and Fault Tolerant Embedded Softwa...Glen Alleman
An overview of developing embedded software systems used for safety critical applications in a variety of domains ‒ from autos, to process control, to flight systems, to medical devices, fire, safety, and security systems.
Advanced Embedded Systems Development, ECEN 5013
University of Colorado, Boulder
The objective of this OpManager POC is to provide step-by-step instructions about how to set up a stand-alone OpManager environment to be used for demonstrating the functions and features of
the products, using customer data, infrastructure and workloads.
The systematic use of proven principles, techniques ,languages and tools for the cost-effective analysis ,documentation and on-going evolution of user needs and the external behavior of a system to satisfy those user needs.
Requirement Elicitation
Facilitated Application Specification Technique(FAST)
Quality Function Deployment
USE-CASES
The product that software professionals build and then support over the long term.Software Characteristics,
1.Software is developed or Engineered, it is not manufactured in the classical sense.Importance of Software Engineering
Software life cycle model: The descriptive and diagrammatic representation of the software life cycle
It represent all the activities performed on software product from the inception to retirement
It also depicts the order in which these activities are to be undertaken
More than one activity can be carried out in a single phase
The primary advantage of adhering to a life cycle model is that it encourages development of software in a systematic and disciplined manner
When a program is developed by a single programmer ,he has the freedom to decide the exact steps through which he will develop the program
Iterative Linear Sequential Model
Intelligent traffic information and control systemSADEED AMEEN
As the problem of urban traffic congestion spreads, there is a pressing need for the introduction of advanced technology and equipment to improve the state of the art of traffic control. In current situation, the signal remains green until the present cars have passed. To avoid those problems we propose a system for controlling the traffic light by image processing. The system will detect vehicles through images instead of using electronic sensors embedded in the pavement. A camera will be installed alongside the traffic light. It will capture image sequences. For this purpose, edge detection has been carried out and according to percentage of matching traffic light-durations can be controlled. In addition, when an emergency vehicle is approaching the junction, it will communicate to the traffic controller in the junction to turn ON the green light. This module uses ZigBee modules for wireless communications between the ambulance and traffic controller. Intelligent traffic control system helps to pass emergency vehicles smoothly. Traffic signal management system is developed for the traffic police, to control the traffic lights manually. Additionally an information system is added using a chat bot module to avail traffic information to user.
THE WAY IN WHICH PEOPLE AQUIRE INFORMATION ABOUT THEIR LOCALITY , WEATHER CON...SADEED AMEEN
TO IMPROVE THE WAY IN WHICH PEOPLE AQUIRE INFORMATION ABOUT THEIR LOCALITY , WEATHER CONDITIONS AND OTHER NECESSARY FACILITIES ON THEIR HANDHELD DEVICES WITHOUT CONNECTING TO THE INTERNET.
WEGET: WIRELESS ENABLED GEO TAGGING SYSTEM
INFORMATION ACCESS LIKE LOCAL WEATHER,MAPS ETC NEEDS CONSTANT INTERNET CONNECTION .
AS THE INTERNET DATA COVERS INFORMATION ABOUT A LARGE AREA , VARIATIONS IN A SMALL AREA WILL BE UNCLEAR.
MAIN UNITS OF OUR SYSTEM ARE:
1. SENSOR FUSION MODULE
2. ROUTER MODULE
3. SERVER
SENSOR FUSION MODULE
IT IS A PLATFORM IN WHICH MORE THAN ONE SENSORS ARE USED.
IT IS USED TO ACCESS DIFFERENT ATMOSPHERIC CONDITIONS SUCH AS TEMPERATURE , PRESSURE ,pH ,MOISTURE ETC.
ROUTER MODULE
THESE ARE SPECIAL ROUTERS WITH MEMORY CAPACITY ,WHICH WILL LOAD DATA FROM THE SENSORS.
THEN THIS DATA IS CONVERTED INTO USEFUL INFORMATION USING OUR ALGORITHIM.
THIS INFORMATION IS DISPLAYED USING OUR USER FRIENDLY INTERFACE.
SERVER
IT TAKES INFORMATION FROM ALL WEGET UNITS
THE INFORMATION IS SORTED, LABELLED AND STORED TO THE DATABASE.
THIS DATABASE IS USED FOR FURTHER ANALYSIS AND FOR THE PREDICITION OF WEATHER CONDITIONS AND TO MAP VARIATIONS IN ENVIRONMENTAL CONDITIONS.
WORKING OF SENSORS
THE TEMPERATURE SENSORS WILL SENSE VARIATIONS IN ATMOSPHERIC TEMPERATURE AND IT CAN BE USED TO PREDICT FOREST FIRES, WIND CURRENTS AND CAN BE USED TO WARN ABOUT SUN BURN.
THE PRESSURE SENSORS WILL REGISTER CHANGE IN PRESSURE WHICH CAN BE USED TO PREDICT CYCLONES.
THE SOIL pH SENSOR AND MOISTURE SENSORS CAN BE USED CHECK SOIL POLLUTION LEVELS.
THE RAIN WATER pH SENSOR WILL B USED TO FIND LEVELS OF CONTAMINANTS IN AIR.
OTHER MAJOR USES:
FINDING AND ALLOCATION OF PARKING LOCATIONS
LOCAL MAPS WITH MAJOR DETAILS SUCH AS LANDMARKS ,HOTELS, ETC THAT CAN BE RATED BY THE USERS.
Tails is an operating system like Windows or Mac OS, but one specially designed to preserve your anonymity and privacy
Tails or The Amnesic Incognito Live System is a security-focused Debian-based Linux distribution aimed at preservingprivacy and anonymity
All its outgoing connections are forced to go through Tor,[4] and direct (non-anonymous) connections are blocked
The system is designed to be booted as a live DVD or live USB, and will leave no trace (digital footprint) on the machine unless explicitly told to do so. The Tor Project has provided most of the financial support for its development
it is the latest operating system,
an organic user interface (OUI) is defined as a user interface with a non-flat display
In an OUI, the display surface is always the locus of interaction, and may actively or passively change shape upon analog (i.e., as close to non-quantized as possible) inputs. These inputs are provided through direct physical gestures, rather than through indirect point-and-click control. The term "Organic" in OUI was derived from organic architecture, referring to the adoption of natural form to design a better fit with human ecology. The term also alludes to the use of organic electronics for this purpose
The three design principles of OUI ar Input equals output,Function equals form and Form follows flow. Input equals output means output is generated graphically on the screen on the basis of input provided by a control device such as a mouse. Function equals form means the shape of an interface determines its physical functionality. Form follows flow indicates OUIs physically adapt to the context of a user's multiple activities
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
TOP 10 B TECH COLLEGES IN JAIPUR 2024.pptxnikitacareer3
Looking for the best engineering colleges in Jaipur for 2024?
Check out our list of the top 10 B.Tech colleges to help you make the right choice for your future career!
1) MNIT
2) MANIPAL UNIV
3) LNMIIT
4) NIMS UNIV
5) JECRC
6) VIVEKANANDA GLOBAL UNIV
7) BIT JAIPUR
8) APEX UNIV
9) AMITY UNIV.
10) JNU
TO KNOW MORE ABOUT COLLEGES, FEES AND PLACEMENT, WATCH THE FULL VIDEO GIVEN BELOW ON "TOP 10 B TECH COLLEGES IN JAIPUR"
https://www.youtube.com/watch?v=vSNje0MBh7g
VISIT CAREER MANTRA PORTAL TO KNOW MORE ABOUT COLLEGES/UNIVERSITITES in Jaipur:
https://careermantra.net/colleges/3378/Jaipur/b-tech
Get all the information you need to plan your next steps in your medical career with Career Mantra!
https://careermantra.net/
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
1. Network Testing and
Debugging
TCP/IP CONCEPTS, WIRING, CONFIGURATING NETWORK, PROTOCOLS
S a d e e d A m e e n P O
s a d e e d a m e e n @ g m a i l . c o m
2. Testing and Debugging
Testing activity is carried down to find the
defect in the network and its configurations.
Identify and remove errors from computer
hardware or from network is termed as
debugging
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3. Possible points of failure
The cable is plugged into the wrong network
Host machine is plugged into the wrong network
Host machine has a bad network card
Machine is offline
The web server may not be running
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4. Testing the IP configuration
Windows systems offer a command-line tool,
called ipconfig, that lets you find out your
computer's IP configuration
The output of this command gives the IP
configuration for each interface
a computer with two network cards and one
wireless adapter has 3 interfaces each with its
own configuration
09-03-2015sadeedameen@gmail.com
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5. Testing the IP configuration cont
The Ethernet interface connected to the local area network (network card) is not
active since the cable is disconnected, but the PPP adapter (MTS) is configured.
Machines on a same network must use a same address range (with different
addresses) and a same subnet mask
In the case of a local network, connecting machines that do not have routable
IP addresses, so-called private address ranges must be used
The default gateway refers to, when applicable, the IP address of the machine
offering internet access. DNS servers
The DNS servers must correspond to the organization's DNS servers; most of the
time these are the service provider's DNS servers
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6. Testing the connection
To test the proper functioning of a network
Ping utility is a highly practical utility provided as a standard feature
with most operating systems.
Ping lets you send a data packet to a network computer and lets
you evaluate the response time
ping -t 192.168.0.3 Ping the IP addresses of the network's computers
ping -t Mickey Ping the computer names
Ping –t www.google.com ping a domain name
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9. Load Testing
Load testing is the process of putting demand on a system or device
and measuring its response. Load testing is performed to determine a
system's behavior under both normal and anticipated
peak loadconditions
Where a system can support testing to actual volumes we have a
performance testing service to meet your requirements.
Our network testing services provides comprehensive concurrent user
simulation of user and system traffic. This can be conducted while
concurrently generating threats and attacking traffic at high loads.
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10. Stress Testing
Stress testing is a form of deliberately intense or thorough
testing used to determine the stability of a given nework.
It involves testing beyond normal operational capacity,
often to a breaking point, in order to observe the results
Stress testing is the process of determining the ability of a
network or device to maintain a certain level of
effectiveness under unfavorable conditions.
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11. Stress Testing
Actions involved may include:
Running several resource-intensive applications in a single computer at
the same time
Attempting to hack into a computer and use it as a zombie to
spreadspam
Flooding a server with useless e-mail messages
Making numerous, concurrent attempts to access a single Web site
Attempting to infect a system with viruses, Trojans, spyware or
othermalware
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12. Negative Testing
Process to verify that the device under test responds
correctly to error conditions or unacceptable input
conditions.
Negative testing can be challenging because the
number of incorrect conditions is unlimited.
Example of a negative test would be using a security
protocol for authentication with an incorrect parameter
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13. Inopportune Testing
Process to verify that the device under test is able to
react properly when an unexpected event occurs
The event is syntactically correct, but occurs when not
expected
Inopportune testing is a specific instance of negative
protocol conformance testing.
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14. Conformance/Compliance Testing
Testing both the capabilities and behavior of an implementation, and
checking what is observed against the conformance requirements in the
relevant International Standards.(ISO/IEC 9646-1:1994(E))
testing to see if the device under test operates according to that
requirement
This is done by creating a series of single function tests for each
requirement, resulting in thousands of tests
An example of a conformance test is to check if the “ping” command
operates correctly.
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15. Line Speed Testing
Process of verifying that a device can operate at its rated
line speed, when the bandwidth is 100% utilized or saturated.
process of subjecting the device under test to out of
boundary conditions
For example, if the device is rated as operating at 5 Giga
bytes per second, then the device should be able to handle
incoming traffic utilizing all the available bandwidth
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16. Performance Testing
Process of verifying that the performance of the
device under test meets an acceptable level
Performance testing is a superset of line speed
testing in which performance applies to many
aspects of a network device or application,
and not just line speed.
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17. Robustness/Security Testing
Process of subjecting a device under test to particular input streams
The input streams may be one of three types:
Random input streams
Valid input streams
Invalid input streams
Security testing is more broadly defined to include monitoring /
surveillance and the detection of specific exploits like IP spoofing or
phishing etc
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18. Interoperability Testing
Process of testing devices from multiple manufacturers by interacting
in such a manner as to exercise the network protocol under test
Interoperability testing is very useful in the early stages of a new
product
As products mature, interoperability testing becomes less valuable as
it does not uncover enough new bugs to warrant the cost of setting
up, configuring and managing network equipment from various
manufacturers.
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19. Network Testing and Debugging
Penetration testing
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20. Penetration testing
Evaluating the security of a network by hacking.
Basically, it is an analysis of system for any potential
vulnerabilities that may result from any of the following:
Poor or improper system configuration
Known and / or unknown hardware or software
flaws
Operational weaknesses in process
Technical countermeasures
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21. Penetration testing cont
Importance of PenetrationTesting:
It prevents financial loss through from hackers or extortionists or
disgruntled employees
It prevents financial loss through unreliable business systems and
processes
From an operational perspective, penetration testing helps shape
information security strategy.
It protects your brand by avoiding loss of consumer confidence
and business reputation.
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22. Basic Network Troubleshooting Tools
Ping
The most commonly used network tool is the ping utility
This utility is used to provide a basic connectivity test between the
requesting host and a destination host.
This is done by using the Internet Control Message Protocol (ICMP)
which has the ability to send an echo packet to a destination host
and a mechanism to listen for a response from this host
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23. Tracert/traceroute
once the ping utility has been used to determine basic
connectivity, the tracert/traceroute utility can used to determine
more specific information about the path to the destination host
It includes the route the packet takes and the response time of
these intermediate hosts
Tracert for Windows machines and traceroute for Linux/unix
based machines
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25. Ipconfig/ifconfig
The utilities that can be used to find out this IP configuration
information include the ipconfig utility on Windows machines and
the ifconfig utility on Linux/unix based machines.
One of the most important things that must be completed when
troubleshooting a networking issue is to find out the specific IP
configuration of the variously affected hosts
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27. Nslookup
Some of the most common networking issues revolve around issues with
Dynamic Name System (DNS) address resolution issues.
The nslookup utility can be used to lookup the specific IP address(es)
associated with a domain name. If this utility is unable to resolve this
information, there is a DNS issue
Along with simple lookup, the nslookup utility is able to query specific
DNS servers to determine an issue with the default DNS servers
configured on a host
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29. Netstat
the current state of the active network
connections on a host
It is also possible to use the netstat utility to
determine which services on a host that is
associated with specific active ports
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31. PuTTY/Tera Term
When connecting to a variety of different types of
equipment, a telnet, SSH or serial client is required; when
this is required both the puTTY and Tera Term programs are
able to provide these functionalities.
The selection of one over the other is strictly a personal
preference.
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33. Subnet and IP Calculator
These can be used to unsure a correct IP address selection and with
this a correct IP address configuration
While this type of tool is used by senior level network engineers, much of
the information obtained from the tool becomes simpler to calculate
the longer and more experience you have in the field
Two of the more commonly used free IP calculators include
Wildpackets (Bitcricket) Network Calculator and Solarwinds Advanced
Subnet Calculator
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34. Subnet and IP Calculator cont
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35. Speedtest.net/pingtest.net
A very easy test that can be used to both determine the Internet bandwidth
available to a specific host and to determine the quality of an Internet
connection is the use of the tools available at the speedtest.net and
pingtest.net websites
The speedtest.net site provides the ability to determine the amount of
bandwidth that is available to a specific host at a specific point in time
This is a good tool to use when measuring how long it is going to take to
upload or download information from a local to remote host
The pingtest.net website is used to determine the quality of the connection by
measuring the ping response times and jitter amounts over a short period of
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36. Speedtest.net/pingtest.net cont
This information can be used to determine a likelihood
of how well the measured connection will deal with
certain types of high demand traffic like Voice over IP
(VoIP) or gaming
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39. Pathping/mtr
In an effort to take advantage of the benefits of both
the ping and tracert/traceroute commands, the
pathping and mtr utilities were developed
Both of these tools take the functionality and
information that can be obtained from these types of
tools and provide a more detailed single picture of the
path characteristics from a specific host to a specific
destination
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