Tag: Network

Secure email delivery #appraise, #appraiser, #appraisal, #appraisalport, #appraiser #network, #appraiser #listings, #residential, #collateral, #cms,




More Business. Less Work.

AppraisalPort connects you to lenders

And to others who engage in real estate appraisal services. Once you are connected, AppraisalPort provides tools to build your reports quickly, accurately, and deliver them straight to your client. Learn more about AppraisalPort

Secure communication with your clients

AppraisalPort is a secure, Web-based work site from which appraisers can receive orders, send completed reports, and communicate with their clients. It is integrated with FNC’s Collateral Management System®, used by many mortgage lenders, banks, and appraisal management companies. Read more AppraisalPort® FAQs

AI Ready™

New order information is auto-populated into your forms software package if you use AI Ready software. This helps to eliminate typos and reduce time spent re-keying information. Read more about AI Ready

  • “Appraisal Port is an intuitive and easy to use platform.
    It is an efficient way for us to interact with our clients while
    maintaining compliance with regulations. It’s an
    essential tool for managing our business.”

– Kevin Allin, San Diego, California

  • “Simple log-in, automatic report acceptance and seamless
    integrated delivery system maximize my clients’ and my time. In
    addition, regular polls and newsletters enhance the
    sense of belonging to a community of appraisers.”

    – Susan Bender-McGoldrick, Lexington, VA.

  • “It’s nice that we can upload quickly and easily.
    It’s convenient to have all of our clients organized on
    one site and makes it very efficient to receive orders.”

    – Beverly Pogue, Bethesda, Maryland

  • “AppraisalPort provides the convenience of auto accepts and
    receiving of orders, and the communication you receive on each one.
    The GAAR option is great for checks and balances, and the rules can
    fire back quickly and reject the report back to
    appraisers to correct the fired rule.”

    – Norma Lorence, Williamston, Michigan

  • “As an appraiser, I am able to post messages and
    communicate 24/7. This has helped eliminate unnecessary phone calls
    and callbacks which tend to grind up time. My productivity
    has increased 25% since I can communicate using AppraisalPort.”

    – Judy DeLeon, Bowie, Maryland

  • “Castle Associates, Inc. strongly endorses AppraisalPort as an
    essential tool for appraisers and lenders. AppraisalPort provides the
    interface necessary to become the fastest and most efficient
    appraisal firm in the Las Vegas Valley.”

    – Aaron Alyea, Las Vegas, Nevada

  • “The structure of AppraisalPort allows for the
    fastest turn times with the highest efficiency. The website is
    reliable and simple to use. AppraisalPort is the premier
    name in appraisal servicing.”

    – Aaron Alyea, Las Vegas, Nevada

  • “Appraisal Associates has had such success
    with the system, it works beautifully, there is no lender pressure,
    and we are freed up to do the job. I have increased
    my production by 30%.”

    – L. Michael Gandy, Las Vegas, Nevada

  • “Your staff always handles any problem that
    comes my way in a courteous manner; they seem to understand how
    difficult and challenging appraising can be. I would like to thank you
    for the opportunity you have given Appraisal Associates.”

    -L. Michael Gandy, Las Vegas, Nevada

  • “I love that it is so easy to add new clients through AppraisalPort.
    Just a couple of clicks and we are connected.”

    – Clint Bruce, San Diego, California

  • “I’ve used several appraisal ordering companies
    over the years but when a lender asks me which one I prefer
    and recommend I always tell them AppraisalPort.
    Quick, easy to use, and reasonable fees.”

    – Clint Bruce, San Diego, California

  • “The few times I’ve had a problem; the customer
    service department has gotten back to me quickly and
    always resolved the issue. I wish all companies were
    as caring and quick to respond.”

    – Clint Bruce, San Diego, California

    Are you sure you don’t want to share your profile?

    You have instructed AppraisalPort not to provide your profile information to any other FNC Clients. While clients may use your profile information in different ways, the most common way they use this data is to ‘board’ appraisal panels at our lender institutions. By opting out, your information will not be provided, which may limit additional assignments you could receive through AppraisalPort. Are you sure you want to take this action?

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  • Scuba Diving with Northwest Scuba in Edmonton – Certification and More #northwest #insurance #network,


    Welcome to Northwest Scuba

    Welcome To Northwest Scuba

    Welcome to Northwest Scuba! We are your one-stop shop for all your scuba diving and snorkeling needs in Edmonton. No matter if you are just looking at beginning your adventures into Scuba Diving or you are an experienced veteran, we have something for you. We offer a wide range of services, courses, dive travel, equipment, and rentals.

    Northwest scuba has provided scuba training, equipment, and customer care in Edmonton and the surrounding area for more than 30 years. Ken and Laura have more than 27 years of experience teaching scuba in both cold and tropical climates, we offer you the highest quality and experienced instructors around. We even have our own course director and a specialty instructor trainer on site.

    Northwest Scuba is a family-run business and we offer honest and friendly service. Our staff will take the time to ensure your equipment fits you properly, answer any and all of your questions, or just enjoy a simple chat about one of our favorite topics… diving.

    Thanks for visiting Northwest Scuba.

    Ken Holliday
    PADI Course Director

    Laura Villneff
    Master Instructor

    Don’t just talk about it, experience it!

    Talk to us about doing your instructor development in Edmonton Alberta or start your IDC on-line. Click on the link and start now.

    Northwest Scuba

    Latest News

    Northwest Scuba is a DDI training facility. (Disabled Divers International)

    Ken is teaching the PADI recreational rebreather course on the Hollis Explorer.

    If you have not gone diving in a while let’s get you reactivated. Call for details.

    Northwest Scuba was awarded a plaque for certifying 10,000 certifications!

    Can’t train in person?

    No problem. With PADI, you can take the classroom portions of a course online. You can start your academics at home at your own pace.

    Looking for travel insurance?

    Purchase your Per-Trip travel insurance plan through the Divers Alert Network (DAN). Get started .

    Wednesday Night Pool Drop In.

    If you want to join us on Wednesday night pool drop in. You need to call a head to get on the list. This way we have enough equipment. You also need to drop by the store on Wednesday night before 8 pm to pay. There is a $20.00 fee for the drop in even if you have your own gear.

    We do our open water dives at Lake Summerside. The lake is not a run off pond. It is filled with City of Edmonton water. You are allowed to Swim, fish and use stand up boards in the lake. It is a great facility to train for open water in.

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    How Does Alexa Track Traffic – Do They Really Have a Grasp of Your


    How Does Alexa Track Traffic Do They Really Have a Grasp of Your Traffic?

    There is a lot of misinformation floating around the Internet in regards to how Alexa tracks traffic, how Alexa rankings work and how they impact your SEO rankings (or don t). I want to add some clarity to this situation so within this upcoming thread I am going to be walking you through Alexa, how it works, and help you decide whether or not it serves any importance towards your online campaigns and success.

    So if you are ready, I am going to get right into the inner workings of Alexa.

    How do Alexa Rankings Work?

    Alexa rankings display several metrics. These include Alexa traffic rank, Traffic Rank in US, Sites Linking in, and, within their charts, you can see the different fields that you can graph out your website history (see example chart below)

    Track network traffic

    BIG QUESTION: But where does Alexa get their data from and is it reliable?

    Alexa gets their rankings from the Alexa Toolbar, which people install into their browsers and it basically tracks their activity around the Internet, the websites they visit, and how often they visit.

    This is where they get most of their data from, so they really do have a minute set of data to work with as only a small fraction of people actually have the Alexa toolbar installed (guestimates say around 15-20 million downloads many of these no longer active), with a good deal of these being people that are Internet marketers who want to track their Alexa rankings.

    Along with that, they claim to get data from other unknown sources as well (yeah ).

    Another concern is the fact that the toolbar is considered to be adware by MacAfee while Symantec another major anti-virus program considers the toolbar trackware because of the nature of how it works (it tracks and stores all of your web activities). If you have it installed, you can best bet that all of your activities are being tracked and the data you are using it for really is deemed quite useless, because it is not real traffic data.

    How to Increase Your Alexa Ranking?

    If you wanted to game Alexa, it is actually quite easy (I will get to that).

    But first, the most obvious way would be to get more website traffic to increase your Alexa rankings right?

    Wrong. More traffic does not equate to higher traffic rankings in Alexa. In fact, in late 2012 I personally ran some tests and comparisons between two completely independent websites just for peace of mind and to validate all of my assumptions about Alexa over the years (that it was more of a gag site than anything).

    In my test, Website A was getting 20,000+ unique visitors per day, and Website B was getting just over 1,000+ uniques per day. In other words Website A was getting 20 times the traffic of Website B, yet the Alexa rank had Website B getting double the traffic within their reporting.

    Completely bogus. Alexa ranking data is completely bogus. The obvious, but ineffective way to get higher Alexa rankings would be to get more traffic to your website but this is simply not the case. The correct way to get higher Alexa rankings is to get more people to visit your website that have the Alexa toolbar installed.

    I am not going to go into details, but based on my first point there are very few data triggers that Alexa has to work off of that are not publicly available. They have no access to ACTUAL website data (only the owner of a website has access to actual traffic stats).

    The traffic data they use is based on their toolbar, so naturally the more people that visit your site that have the toolbar installed will improve your Alexa rank (hint, hint).

    How to Check Alexa Rank?

    Many of you are probably wondering where to go to find out your Alexa rank. You can actually do this directly through their website, or you can install their adware toolbar (not recommended).

    Track network traffic

    Again, take your ranking with a grain of salt. It won t benefit you in any way knowing your Alexa, nor will it be a sound indicator of how your website ranks compared to others out there. The reason. They DO NOT have this data!

    If you are interested in finding out where your website ranks in Google, an important metric when determining your SEO effectiveness there are tools that can scan Google s search results and tell you where you are ranked (what page you are on) under specific keywords.

    If you want to find out what page you are ranked on in Google, I recommend that you use Jaaxy.com for this.

    Alexa Ranking Package, Is it Worth It?

    On the Alexa website you will notice there are many different services they are attempting to sell you. You will see something similar to this within the Alexa sidebar when you are on their site

    Track network traffic

    I also have personally tried these services (Get Certified Metrics) for testing purposes and can honestly tell you that you are buying into an empty offer.

    The Get Certified Metrics is a service where you have to pay to give Alexa your accurate data. Shouldn t they be paying you for this? You will see absolutely no value from doing this and if you are even remotely interested in taking advantage of this, please do save your money.

    Does Alexa Rank Have Anything to Do With SEO?

    Recently it appears that many folks have been vastly misinformed as to how Alexa works and what the purpose of Alexa is. There are folks going around the Internet touting an Alexa score as some sort of indicator as to how well a website ranks in Google or how it reflects website success.

    However, Alexa rank has no correlation to SEO or how well a site gets indexed. So if someone tells you that Alexa means something and tout it as a reason to join their service, you may want to head the other way.

    Secondly, Alexa offers Web Analytics toolkits for $149 per month. This service is a complete redundancy if you have Google Analytics (which is free) and in fact, the Alexa Advanced Plan will offer you inferior data to that you can get with Analytics and Webmaster Tools, both free services offer by Google.

    Track network traffic

    So Alexa will not efficiently or accurately track your traffic and they will not be able to serve as any sort of indicator in respect to SEO. If you want to get SEO help, the best thing you can do is to learn about it yourself and there are services out there that can help you out with this. If you want to get help with your rankings in Google, you can get up and running know with some REAL education. Get rolling here!

    I hope this has added some clarity to the whole Alexasphere and if you do have anything in addition to add, any Alexa experiences or any questions about any of this content, drop me a note below and I will be more than happy to discuss.

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    PassMark WirelessMon – Wireless WiFi monitoring software #wifi #network #monitoring #software


    Latest release date:
    19 March 2015

    Free 30 day evaluation, then:

    Professional Edition: US$44.10
    (10% off ) $49.00

    Standard Edition: US$21.60
    (10% off ) $24.00

    (See sales page for more pricing details)

    Windows XP, 2003, 2008, Vista, Windows 7, Windows 8 and Windows 10 32bit and 64bit.

    Note: Windows 95, 98, 2000 and NT are not supported.

    64 MB RAM, 15 MB of disk space, compatible 802.11 wireless adapter(s).

    Version 4.0 is now available. see what’s new for more information.

    WirelessMon is a software tool that allows users to monitor the status of wireless WiFi adapter(s) and gather information about nearby wireless access points and hot spots in real time. WirelessMon can log the information it collects into a file, while also providing comprehensive graphing of signal level and real time IP and 802.11 WiFi statistics.

    • Verify 802.11 network configuration is correct.
    • Test WiFi hardware and device drivers are functioning correctly.
    • Check signal levels from your local WiFi network and nearby networks.
    • Help locate sources of interference to your network.
    • WirelessMon supports the MetaGeek Wi-Spy (2.4i, 2.4x and DBx) useful for finding interference from non 802.11A/B/G/N devices transmitting on the same frequencies
    • Scan for hot spots in your local area (wardriving)
    • Create signal strength maps of an area (also known as heat maps)
    • GPS support for logging and mapping signal strength
    • Mapping can be performed with or without a GPS unit
    • Correctly locate your wireless antenna (especially important for directional antennas).
    • Verify the security settings for local access points.
    • Measure network speed throughput and view available data rates.
    • Help check Wifi network coverage and range
    • A feature-rich, value-for-money alternative to NetStumbler.


    Any wireless adapter complies with the NDIS_802.11 should be able to report information to WirelessMon. Note that only Windows XP, 2003, Vista Win7 support this software. Windows 95, 98 and NT are not supported. Windows 2000 (Service pack 4 and above) may work but is not actively supported.

    All the various IEEE 802.11 standards are supported, including 802.11a, 802.11b and 802.11g. 802.11N and 802.11AC is supported to the extent provided by Windows, as the drafts become a completed standard more support should become available. Some features may not be supported by some wireless adapters, typically they will report only partial information in this case. It has been also been noted that several wireless adapter manufacturers are not providing device drivers that are fully Windows compliant.

    From version 4 some Garmin USB GPS devices (developed using the standalone OEM USB units) are supported via USB connection.

    Wireless LAN information

    The following wireless LAN information is displayed by WirelessMon (when available, as not all wireless adapters will support all of these features).

    • Current connection information: SSID; Connected access point MAC address; Signal strength; Tx Power; Authentication type; RTS Threshold; Fragmentation Threshold; Channel in use; Frequency being used; Number of Antennas; Beacon Period; ATIM Window; Dwell Time; Hop Pattern; Hop Set.

    • Statistics information: More than 30 parameters are reported. Including a detailed break down of frames sent and received, error counts, transmission retry counters and related low level data.

    • IP information: Information about the current TCP/IP connection is reported. Including the adapter MAC address; Adapter device driver name; the IP Address; Subnet Mask; if DHCP is enabled; the Gateway Address and the DHCP server IP address.

    • IP counter information: Network throughput is monitored and displayed. This includes the maximum bandwidth available from the network adapter hardware, the current send and receive data rates in bytes per second and packets per second, plus error counters.

    Standard and Professional Version Differences

    There are two registered version available, standard and professional. The professional version has all of WirelessMon’s features enabled while the standard version has the following restrictions;

    • No GPS: GPS coordinates are not supported and cannot be used for logging or creating a signal strength map
    • No signal strength map: The map tab and options are disabled so a signal strength map can not be created, saved or printed.

    Free Upgrade

    We are offering a free upgrade to WirelessMon 4.0 to our existing users who purchased previous versions from us. If you have and older version of WirelessMon you will require a new registration key. Please see the Free Upgrades Page for details of upgrades.


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    What is network functions virtualization (NFV)? Definition from #network #function #virtualization


    network functions virtualization (NFV)

    Network functions virtualization (NFV) is an initiative to virtualize the network services that are now being carried out by proprietary. dedicated hardware. If successful, NFV will decrease the amount of proprietary hardware that’s needed to launch and operate network services.

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    The goal of NFV is to decouple network functions from dedicated hardware devices and allow network services that are now being carried out by routers. firewalls. load balancers and other dedicated hardware devices to be hosted on virtual machines (VMs ). Once the network functions are under the control of a hypervisor. the services that once require dedicated hardware can be performed on standard x86 servers.

    This capability is important because it means that network administrators will no longer need to purchase dedicated hardware devices in order to build a service chain. Because server capacity will be able to be added through software, there will be no need for network administrators to overprovision their data centers which will reduce both capital expenses (CAPex ) and operating expenses (OPex ). If an application running on a VM required more bandwidth, for example, the administrator could move the VM to another physical server or provision another virtual machine on the original server to take part of the load. Having this flexibility will allow an IT department to respond in a more agile manner to changing business goals and network service demands.

    NFV is different from software-defined networking (SDN) but is complementary to it; when SDN runs on the NFV infrastructure, the SDN forwards the data packets from one network device to another while the network routing (control) functions run on a virtual machine in, for example, a rack mount server. The NFV concept, which was presented by a group of network service providers at the Software Defined Network and OpenFlow World Congress in October 2012, is being developed by the ETSI Industry Specification Group (ISG) for Network Functions Virtualization.

    This was last updated in March 2016

    Continue Reading About network functions virtualization (NFV)

    Related Terms

    NFV MANO (network functions virtualization management and orchestration) NFV MANO (network functions virtualization management and orchestration), also called MANO, is an architectural framework for. See complete definition NFVi (network functions virtualization infrastructure) NFVi (network functions virtualization infrastructure) is a pool of virtual and physical resources that enables the deployment of. See complete definition virtual network functions VNF moves network functions out of dedicated hardware devices and into software. See complete definition



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    VPN – Virtual Private Network Definition #vpn, #virtual #private #network, #tunneling, #ipsec, #define, #webopedia,


    VPN – virtual private network

    Related Terms

    A v irtual p rivate n etwork (VPN ) is a network that is constructed using public wires usually the Internet to connect remote users or regional offices to a company’s private, internal network.

    Privacy, Security and Encryption

    A VPN secures the private network, using encryption and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted. This type of network is designed to provides a secure, encrypted tunnel in which to transmit the data between the remote user and the company network.

    The information transmitted between the two locations via the encrypted tunnel cannot be read by anyone else because the system contains several elements to secure both the company’s private network and the outside network through which the remote user connects through.

    The first step to security is usually a firewall between the client and the host server, requiring the remote user to establish an authenticated connection with the firewall. Encryption is also an important component of a secure VPN. Encryption works by having all data sent from one computer encrypted in such a way that only the computer it is sending to can decrypt the data.

    Main Network Protocols

    There are three main network protocols for use with VPN tunnels. These protocols are generally incompatible with each other. They include the following:

    A set of protocols developed by the IETF to support secure exchange of packets at the IP layer. IPsec has been deployed widely to implement VPNs. IPsec supports two encryption modes: transport and tunnel.

    The Point-to-Point Tunneling Protocol is a technology for creating VPNs, developed jointly by Microsoft, U.S. Robotics and several remote access vendor companies, known collectively as the PPTP Forum.

    Layer Two (2) Tunneling Protocol is an extension to the PPP protocol that enables ISPs to operate Virtual Private Networks (VPNs).

    Consumer Versus Corporate Services

    Consumers use a private VPN service, also known as a VPN tunnel. to protect their online activity and identity. By using an anonymous VPN service, a user’s Internet traffic and data remain encrypted. which prevents eavesdroppers from sniffing Internet activity. VPN services are especially useful when accessing public Wi-Fi hotspots because the public wireless services might not be secure. In addition to public Wi-Fi security, a private VPN service also provides consumers with uncensored Internet access and can help prevent data theft and unblock websites.

    Companies and organizations will typically use a VPN to communicate confidentially over a public network and to send voice, video or data. It is also an excellent option for remote workers and organizations with global offices and partners to share data in a private manner.

    Virtual private dial-up network (VPDN) Explained

    One of the most common types of VPNs used by businesses is called a virtual private dial-up network (VPDN ). A VPDN is a user-to-LAN connection, where remote users need to connect to the company LAN. Another type of VPN is commonly called a site-to-site VPN. Here the company would invest in dedicated hardware to connect multiple sites to their LAN though a public network, usually the Internet.

    Looking for Free VPN Services?

    Free VPN usually refers to services and tools that let you browse the Web securely and anonymously. The tools are typically available for desktop and mobile Web browsing. Read Webopedia’s 5 Free VPN Services article to learn more.

    From A3 to LOL and ZZZ this guide lists 1,500 text message and online chat abbreviations to help you translate and understand today’s texting. Read More

    From keyword analysis to backlinks and Google search engine algorithm updates, our search engine optimization glossary lists 85 SEO terms you need. Read More

    Microsoft Windows is a family of operating systems for personal computers. In this article we look at the history of Microsoft operating. Read More

    Learn about each of the five generations of computers and major technology developments that have led to the computing devices that we use. Read More

    Computer architecture provides an introduction to system design basics for most computer science students. Read More

    Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and. Read More

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    BAS Network Administration & Security – Information Technology Programs at Green River College #green



    Network Administration and Security

    Earn a great living wage in a high demand field. Make a difference in your community. Reach your potential –

    Get your Bachelor’s in Network Administration Security at Green River College!

    • Earn a degree designed around the skills and certifications employers want.
    • Hands on, applied learning with the latest technologies.
    • Small class sizes and dedicated faculty who care about your success.
    • Day and evening classes available with full- or part-time scheduling.
    • Individualized, wrap-around support services, including career preparation.

    Start your journey towards an exciting, rewarding career by contacting an advisor today!

    Entry Requirements

    Incoming students must have earned associate s degree or higher from a regionally accredited institution that includes 20 credits of general education courses. Students who do not have an associate s degree or higher but have completed some college coursework or have prior work experience are encouraged to meet with an advisor in the Information Technology department to develop an education plan for entry into the program.

    A cumulative GPA of 2.0 from all college coursework is required. Students must also have earned a minimum grade of 2.5 in all technical courses including those in Computer Science and Information Technology. Lastly, the following courses, equivalent experience or certifications are strongly recommended before entering this program:

    • IT 102 Introduction to Programming
    • IT 114 CompTIA A+ Certification Preparation
    • IT 131 Networking Fundamentals
    • IT 160 Windows Server Administration I
    • IT 190 Linux Administration I
    • IT 210 Introduction to Routing and Switching
    • IT 240 Windows Server Administration II

    Sample Schedule

    Quarter 1

    • Network Security
    • Virtualization and
    • General Education course

    Meet the Team

    Sheila Capps, Program Manager

    Sheila Capps has happily worked in the fields of education and technology for her entire career. The common denominator among all of her jobs is that they have been student-focused, and her overarching goal is to support and foster student success. As Program Manager, Sheila engages new students, advises and provides wrap-around support services to current students, and mentors and cheers students on to graduation. Sheila’s certifications include Certified ScrumMaster (CSM).

    Alan Carter, Faculty, Program Director

    Alan taught Microsoft, Novell, and custom courseware throughout the United States for 15 years before joining the faculty at Green River College and teaching information technology courses for the past 10 years. He has also installed and supported complex networks while working as staff for regional and national value added resellers. In addition, Alan published several bestselling technical books, including Windows NT 4.0 MCSE Study Guide (IDG Books Worldwide, 1998) and Windows 2000 MCSE Study System (IDG Books Worldwide, 2000). Alan’s certifications include Cisco CCNA, CompTIA A+, Network+ and Security+.

    Tim Mason, Faculty

    Tim has taught Microsoft, Unix, Linux and programming courses for the past 15 years and now teaches full-time at Green River College. He has served as Founder and COO of mystorage.net, a predecessor to current cloud storage providers, as a Chief Information Security Officer for an international cryptographic provider, and as a Chief Cryptologist for the Department of Defense. Tim’s certifications include Certified Information Systems Security Professional (CISSP), Certified Ethical Hacker (CEH), OSSTMM Professional Security Tester Accredited Certification (OPST), CompTIA Security+, and Information Technology Infrastructure Library (ITILv3).

    Krish Mahadevan, Faculty

    Krish currently teaches server and client technologies in Windows and Linux. He has an extensive background in electrical and automotive systems engineering, having worked at Ford Motor Company, Detroit, Mich igan, and at Cummins Incorporated in Charleston, South Carolina. specializing in real-time embedded systems programming. Krish’s certifications include Certified Ethical Hacker (CEH) and Digital Forensic Examiner (DFE).

    Simone Jarzabek, Faculty

    Simone started her career at Boeing Company working as a Systems Administrator and as a Technical Project Manager. Prior to joining the faculty at Green River College, she taught Information Technology for 13 years at ITT Technical Institute and Highline College. Simone received her M.A. in Information Technology and Digital Forensics from American Public University, a B.S. in Mechanical Engineering from the University of Washington, and a B.S. in Computer Science and Mathematics from University of Puget Sound .

    Ed Goad, Faculty

    Ed teaches in both the AA and BAS programs at Green River. He was worked in the IT industry for 20 years at a variety of organizations supporting large enterprise environments. Ed s certifications include several from Microsoft, VMware, RedHat, Cisco and Brocade.

    Primary professional interests:

    • Security
    • Linux / Unix
    • Windows Server
    • System Automation
    • Cloud Services
    • Networking

    When Ed finally unplugs from the computer, he enjoys exploring the amazing Pacific Northwest the many small towns and hiking through the mountains.

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    The TCP #major #classes #of #an #ip #network


    Please Whitelist This Site?

    I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don’t want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. )

    If you like The TCP/IP Guide, please consider the download version. It’s priced very economically and you can read all of it in a convenient format without ads.

    Thanks for your understanding!

    Sincerely, Charles Kozierok
    Author and Publisher, The TCP/IP Guide

    IP “Classful” Addressing Overview and Address Classes
    (Page 1 of 2)

    When the first precursor of the Internet was developed, some of the requirements of the internetwork, both present and future, were quickly realized. The Internet would start small but eventually grow. It would be shared by many organizations. Since it is necessary for all IP addresses on the internetwork to be unique, a system had to be created for dividing up the available addresses and share them amongst those organizations. A central authority had to be established for this purpose, and a scheme developed for it to effectively allocate addresses.

    The developers of IP recognized that organizations come in different sizes and would therefore need varying numbers of IP addresses on the Internet. They devised a system whereby the IP address space would be divided into classes. each of which contained a portion of the total addresses and were dedicated to specific uses. Some would be devoted to large networks on the Internet, while others would be for smaller organizations, and still others reserved for special purposes.

    Since this was the original system, it had no name; it was just the IP addressing system. Today, in reference to its use of classes, it is called the classful addressing scheme, to differentiate it from the newer classless scheme. As I said at the end of the introduction to this section. classful isn’t really a word, but it’s what everyone uses.

    IP Address Classes

    There are five classes in the classful system, which are given letters A through E. Table 43 provides some general information about the classes, their intended uses and other general characteristics about them:

    Table 43: IP Address Classes and Class Characteristics and Uses

    IP Address Class

    Reserved for experimental use .

    Looking at this table (and at Figure 60 ) you can see that the first three, classes A, B and C, comprise most of the total address space (7/8ths of it). These are the classes used for unicast IP addressing, which means for messages sent to a single network interface. (The blocks also include associated broadcast addresses for these networks.) This is what we usually consider normal IP addressing. You can think of classes A, B and C as the papa bear , mama bear and baby bear of traditional IP addressing. They allow the Internet to provide addressing for a small number of very large networks, a moderate number of medium-sized organizations, and a large number of smaller companies. This approximately reflects the distribution of organization sizes, approximately, in the real world, though the large gulf in the maximum number of hosts allowed for each address class leads to inflexibility and problems.

    As you can see, the classes differ in the place where the dividing line is drawn between the network ID and the host ID portions of the addresses they contain. However, in each case the division is made on octet boundaries: in classful addressing, the division does not occur within an octet.

    Figure 60: Division of IPv4 Address Space Into Classes

    (I don t really need to explain this one, do I? J )

    Classes D and E are special to the point where many people don’t even realize they exist. Class D is used for IP multicasting. while class E was reserved for experimental use . I discuss IP multicast addressing later in this section.

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