Transcript Week_Twelve_Networkx

ITEC 275
Computer Networks – Switching,
Routing, and WANs
Week 12
Professor Robert D’Andrea
Winter 2017
Agenda
• Learning Activities
• Review characterize existing network
• Network testing
• Benchmark comparison testing
• Building a prototype network system
• Testing your network
• Documenting network systems
• Areas of Interest
- Response to RFP
- Contents of Network Document
- Network Design Testing
Evaluate Existing Network
• Document
- Structure of existing network
- Logical design should include drawings, naming
convention, protocols, addressing, network
management
- Physical design should describe the features and
recommended uses for the technologies and
devices. Include pricing for all hardware and
software.
- Applications to be used on system
- Analysis of the health and performance
Network Testing
Evaluate existing networks.
View Anthony video:
https://www.youtube.com/watch?v=zbq4qiL5bG8
Network Testing
Today, most all computers have a network
connection of some description. This could be to an
Internet Service Provider (ISP), or to an Ethernet
connection to a company intranet, sending and receiving
data bi-directionally to other computers which might be
an essential daily procedure. With the myriad of
applications available, the use of TCP/IP networking,
email, web browsers and games are in use on a regular
basis. In all cases, the one performance factor the user is
most concerned with is speed or transfer rate and
security.
Network Testing
Network connections are very common in todays
environment. These connections are utilized in company
environments and at home because of the affordable
broadband connection made available by ISPs. Setting up
a local area network is so much easier today thanks to the
multiple port router where all you need is just plug in the
network cable and it will work right after going through a
simple wizard configuration. Even wireless connections
can be quickly and easily established by pressing the WiFi Protected Setup (WPS) button that is found on most
newer generation routers.
Network Testing
Whether you are a computer technician, software
engineer, teacher or just an every day user, it is important
to make sure that your network connection is working
properly in order to achieve the fastest file download or
transfer speed and a stable connection for streaming
purposes.
The availability of many of these tools is plentiful.
Many network testing tools are free. The open source
community has provided many different types of network
testing applications.
Network Testing
Google has introduced a new tool for testing
network traffic security called Nogotofail.
Network Testing
By default, when you send email to or receive
email from a given address or domain, Google Apps
Gmail checks to see if secure transport (TLS) is available
for that address or domain. If so, Gmail delivers the
message using secure transport. If not, Gmail delivers the
message over a non-secure connection. However, you
can use the Secure transport (TLS) compliance setting
to require mail to be transmitted via a secure connection
when users correspond with specific domains and email
addresses.
Network Testing
The tool’s main purpose is to test whether the
devices or applications are safe against known TLS/SSL
vulnerabilities and misconfigurations (it includes testing
for common SSL certificate verification issues, HTTPS
and TLS/SSL library bugs, SSL and STARTTLS
stripping issues, cleartext issues, and so on). Nogotofail
works on Android, iOS, Linux, Windows, Chrome OS,
OSX, and “in fact any device you use to connect to the
Internet.”
Today’s move is a push to boost TLS/SSL usage
by releasing the tool for public use.
Network Testing
The Secure Sockets Layer (SSL) and
Transport Layer Security (TLS) is the most
widely deployed security protocol used today.
It is essentially a protocol that provides a
secure channel between two machines
operating over the Internet or an internal
network. In today’s Internet focused world,
the SSL protocol is typically used when a
web browser needs to securely connect to a
web server over the inherently insecure
Internet.
Network Testing
Technically, SSL is a transparent protocol
which requires little interaction from the end
user when establishing a secure session. In the
case of a browser for instance, users are alerted
to the presence of SSL when the browser
displays a padlock, or, in the case
of ExtendedValadation SSL, when the address
bar displays both a padlock and a green bar. This
is the key to the success of SSL – it is an
incredibly simple experience for end users.
Network Testing
Internet Speed Tracker Extension (Chrome
browser). Includes a History display.
Network Testing
1. LAN Speed Test
Network Testing
1. LAN Speed Test is used to measure the speed on your
LAN by copying a file to another computer that is located
at the same local network. All you need to do is browse the
location of another computer on the network where you
have write access and click the Start Test button. You will
then be prompted to set the file size of the dummy file to be
transferred. One advantage of using this tool, you do not
need to setup a master and client connectivity. This tool
provides a Print Results button for printing the results at the
end of the test.
LAN Speed Test Look@LAN Network Monitor
Network Testing
2. LANBench Test
Network Testing
2. LANBench Test is a tool only to be used to test TCP.
This tool requires the computers to be configured as a
client/server model. The client computer will be the
tester. The role of the server is to press the Listen button.
The client side requires a bit more configuration setup,
the servers IP address. Tests can be setup to define the
test duration, packet size, connection and transfer mode.
What is interesting to watch with this tool is to see the
live transfer rate and average performance indicators.
www.zachsaw.com/pg=lanbench_tcp_network_benchmark
Network Testing
3. NetIO-GUI
Network Testing
3. NetIO-GUI is a command line application for
benchmarking the network throughput and there is a
portable GUI version that works as a front end. After
downloading, run the extractor, followed by running
NetIO-GUI.exe. You will also need to run NetIO-GUI on
both computers that you want to test, one as client-mode
and the other as server-mode. The server will only
require to click on the Start server button while for the
client, you will need to input the server’s IP address and
optionally select the protocol (TCP or UDP) that you
want to test. NetIO-GUI will then test the connectivity
based on a few different packet size.
Network Testing
www.softpedia.com/get/PORTABLESOFTWARE/Network/NetIO-GUI-Portable.shtml
NetIO-GUI Portable is a simple software tool
which enables you to measure the ICMP responses and
network transfer rates and save results to a file.
Network Testing
4. NetStress Test
Network Testing
4. NetStress is considered an internal tool. It requires
both computers that want to test to be downloaded with
this software. This tool automatically determines the
receiver IP address.
In order to use this tool for testing and troubleshoot
networks, you need tools that allow for the generation of
network traffic and analyze the network’s throughput
performance.
Nutsaboutnets.com/netstress/
Network Testing
5. AIDA32 Test
Network Testing
5. AIDA32 is the popular hardware information and
benchmarking tool known as EVEREST. Currently, there
is an AIDA64 version. Just like most of the network
benchmarking tools, you need to run the network
benchmark plugin on both computers that you want to
test.
On one computer, select Master from the drop
down list located at the bottom of the window, go to the
Bandwidth tab and click on the Start button. On another
computer, select Slave, enter the IP address of the
Master, go to Bandwidth tab and click Start. The Save
button allows you to save the bandwidth chart in bitmap
format
Network Testing
www.softpedia.com/get/System-Info/AIDA.shtml
Network Testing
6. Performance Test
Network Testing
6. Performance Test by PassMark is a network
benchmarking tool. It can test both IPv4/IPv6 and
allowing you to set the data block size and enable UDP
bandwidth throttling.
PassMark Performance Test allows you to
objectively benchmark a PC using different speed tests
and compare those results to other computers.
www.passmark.com/products/pt.htm
Benchmark Comparison Testing
Benchmark Comparison Testing
Benchmark Comparison Testing
Reasons for benchmarking systems is to capture
data in certain configurations where you have:
• Low latency
• High performance
• Data integrity
• High efficiency
• Less jitter
Building a Network System
Building a network computer lab or prototype with Eli.
View Eli video:
https://www.youtube.com/watch?v=dIFKmJ4wufc
Document Network System
A design document describes your customer’s
requirements and explains how your new design is
going to meet their requirements.
The design document includes the existing
network, the logical and physical design, and budget
and expenses associated with the new project.
A design document includes plans for
implementation of the network, and evolving the
network design as the company grows. It is important
to include that the network design is an iterative
process. Steps are always being taken to optimize
network performance.
Technical Goals Reflected in Testing
• Scalability is growth a network design must support
• Availability available for users MTBF and MTTR
• Network performance customer’s criteria of acceptance
(throughput, delay, response time)
• Security general and specific goals to protect company
information
• Manageability of performance, fault, configuration, security,
and accounting management
• Usability ease of use by user community
• Adaptability to network failures and its services
• Affordability containing costs associated with purchases
The technical goals should also include any tradeoffs the customer
is willing to make.
Technical Goals Reflected in Testing
• User Communities and Data Stores
- List major user communities, their sizes, locations, and the
principal applications they use.
• Network Applications
- Characterizes new and existing network applications.
Network Design Testing
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Testing objectives
Test acceptance criteria
Testing tools
Text scripts
Results and observations
The customer should be informed on how the results
were determined, through component or live or
prototype network testing, load factors applied during
testing.
Network Design Testing
Types of tests
•Application response-time tests
•Throughput tests
•Availability tests
•Regression tests
Implementation Plan
• The Implementation Plan should include
recommendations for deploying network design.
• Details of plan are dependent on the audience
- IS department will want a very detailed plan
- Sale engineer brief summary of network
products
- Upper management will not be interested in the
technical details, as much as cost and
return on investment.
Implementation Plan
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Project schedule
Plans for installation of links, equipment, or services.
Outsourcing or management of the network
Plan to communicate design to user community,
network administrators and management
Training for network managers and users
Plan to baseline effectiveness of new design
List of known risks that could delay the project
Fallback plan if failure occurs
Plan to evolve network design as new applications
arise
Implementation Plan
The Implementation Plan should include a project
schedule or timeline. This schedule should include dates
and deliverables for major events.
Project Budget Document
This document should list the money available for
equipment, maintenance, service contracts, training, and
staff.
In addition, include the a Return-On-Investment
analysis. Most customers feel better after observing the
investment savings.
Document Appendix
• Store supplemental information
- Topology maps
- Device configurations
- Network addressing
- Naming convention
- Results from testing network design
Summary
• If the customer provides an RFP
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- Follow the format presented
- Otherwise, develop a document that describes requirements,
existing network, logical and physical design, budget, and
expenses associated with the network design.
Executive Summary
Primary project goals
Network topology
Addressing and naming convention
Test results
Plan for implementing and measuring performance, security,
manageability, usability, and availability.
This Week’s Outcomes
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Network Design Testing
Benchmark Comparison Testing
Document Your Network Design
Guidelines for RFP
Document Content
Technical Goals Reflected in Testing
Document Appendix
Due this week
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13-1 – Concept questions 11
Next week
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Review chapter 14 in Top-Down Network
Design
Q&A
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Questions, comments, concerns?