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- Cisco Administration 101: Understand the OSI model to become a better Cisco troubleshooter
- David Davis explains how the seven layers of the OSI Model can help you as a Cisco administrator. Get a brief overview of the OSI model and learn why it is more than just a textbook concept -- understanding it will help you every day of your career. by David...
- Tags: OSI, Certification, Administrator, Layer 3, Network, Administration, Layer, Cisco Systems Inc., David Davis, ACL, Networking
- Blog posts 2008-06-20
- OSI Layer
- What's mean by OSI Layer?
- Tags: pllaxman@..., OSI Layer, OSI
- Discussion threads 2007-10-24
- OSI Layer-2 Encryption: Security goes one layer deeper
- Ethernet Layer 2 EncryptionI find it hard to believe this article firstly has no posts, and secondly doesn't recognise Senetas. Senetas is a pure Layer 2 vendor, who provides Layer 2 encryption hardware to SafeNet, nCipher and Thales.Senetas has Layer 2 encryptors for ATM, Sonet/SDH and Ethernet, ans all...
- Tags: Network technology, NETWORKING, OSI, security, andrew.younger@..., Senetas, Ethernet, Layer 2
- Discussion threads 2007-09-13
- OSI Layer-2 Encryption: Security goes one layer deeper
- Encryption over Ethernet is emerging as a new solution for powering secure networks. Increasingly being adopted for military and critical networking infrastructures, Layer-2 encryption helps offload complexity and reduce maintenance charges. Encryption has been present in the Layer-3 IPSec and Layer-4 (SSL, TSL)...
- Tags: OSI, Network, Encryption, IPSec, Networking, Security, Arun Radhakrishnan
- Blog posts 2007-06-20
- collision domains
- What happens when two or more computers on the same segment send out a request at the same time?They shouldn't ethernet uses a formula and "hello" packet to check if the line is clear to send info. If there is a collision, then both sending devices receive a report...
- Tags: network interface card, Ethernet, packet collision, collision, networking, rocenosek@..., it management, collision domain
- Q&A 2006-09-07
- Kenbak-1 (Inside the first personal computer: Kenbak-1)
- Earlier computerI have two OSI computers which probably predate the Kenbak-1. They use 1/4" tape storage, have no internal memory. Programs had to be written in basic on tape. If anyone has info on this computer please share it with me. I've had it so long I have forgotten the...
- Tags: Kenbak-1, primitive computer, tape memory, osi, basic, computer, markan.ent@..., hardware, PC
- Discussion threads 2006-07-29
- Get real-world examples for applying network troubleshooting methodologies
- A few weeks ago, David Davis wrote an article about choosing a network troubleshooting methodology and introduced you to three approaches to network troubleshooting. This week, he revisits those approaches and offers up some real-world examples for applying them to your network. A few weeks ago, I wrote an...
- Tags: NETWORKING, Network technology, David Davis CCIE, MCSE+I, SCSA, Layer 1, bottom-up approach, Ethernet, network, Ethernet cable, OSI, Cisco Routers and Management Newsletter, DNS, PC, IP, IP Address, Subnet, Listing B, David Davis, Listing C, Default Gateway, Listing D
- Technical articles 2005-11-17
- Choose a network troubleshooting methodology
- Many network administrators don't use an official methodology when it comes to troubleshooting network problems, but there's something to be said for taking a more formal approach. David Davis examines three network troubleshooting methodologies and discusses the advantages of each approach. A decent portion of every network administrator's job...
- Tags: OSI, NETWORKING, Ethernet, Network technology, David Davis CCIE, MCSE+I, SCSA, network, receiver, physical layer, Cisco Routers and Management Newsletter, Problem, Cisco Systems Inc., David Davis
- Technical articles 2005-10-20
- OSI Layers
- I am having trouble finding out in which OSI Layer does the ultimate sender and receiver of data make contact?Hi,It's been a while since I looked at the OSI, but from memory it is the session layer.Layer 5: The session layer...This layer sets up, coordinates, and terminates conversations, exchanges, and...
- Tags: networking, OSI, OSI Layer, srkcmk@...
- Q&A 2005-08-28
- Mac malware door creaks open
- It was just a matter of time...If Apple is dead set on increasing its market share of the PC marketplace, then they will have to accept the malicious attacks and exploits that have plagued that other operating system. Welcome to the club!!
- Tags: Apple Macintosh, Mac malware, malware, OSI, security
- Discussion threads 2005-05-12
- Test your OSI knowledge
- OSI is an abbreviation, not an acronymOSI is an abbreviation, not an acronym.Not a TLA?From Dictionary.com:acronymn : a word formed from the initial letters of a multi-word name. . .See also TLA.tla :Three-Letter AcronymYes, it is a TLA.TLA - Three Letter AbbreviationConfusing answers...Question 12. Layer 2 is not Application....OSI is...
- Tags: OSI
- Discussion threads 2005-04-18
- Test your OSI knowledge
- Take Our OSI quiz!The OSI model is an IT industry staple and was likely part of your basic IT training. Much like the ABCs were engrained into our heads as little children the OSI model is taught to all adolescent IT folks, over and over again.However...maybe you have been doing...
- Tags: knowledge, OSI, OSI Model
- Technical articles 2005-04-18
- Cisco CCNA Self-Study: Fundamentals of IP
- This sample chapter, taken from CiscoPress' CCNA INTRO Exam Certification Guide (CCNA Self-Study, 640-821, 640-801), presents the core concepts behind OSI Layer 3. Because CCNA focuses on TCP/IP, the chapter also describes the main Layer 3 protocol used by TCP/IP-namely, the Internet Protocol IP. This coverage includes IP addressing, IP...
- Tags: CCNA, Cisco Systems Inc., fundamentals, IP, Layer 3, network, OSI, TCP/IP
- Download resources 2005-03-15
- Open-source overseer proposes paring license list
- Stay on top of the latest tech news with our free IT News Digest newsletter, delivered each weekday. Automatically sign up today!By ...
- Tags: Open-source overseer, open source, OSI
- Technical articles 2005-03-03
- Layers of an E-mail
- Can anyone tell if these are the layers of an e-mail, Session, Presentation, and Application layer?nopethis single layer format is because email is meant for a communication, not as a base for an application.email should only be plain text.What time...What time is your homework due in then?By the way, they...
- Tags: Application Layer, e-mail, OSI, transparentheart069@...
- Discussion threads 2005-02-14
- email applications
- Can anyone tell me What's the appropriate layers of the OSI model for e-mail applications?Teach a man to fish ...When I read your question I immediately went to the Google web site and entered a search on the following:IMAP email protocol specificationThe first result was a pointer to a web...
- Tags: E-mail, OSI
- Discussion threads 2005-02-12
- Open-source leader steps aside at industry group
- Stay on top of the latest tech news with our free IT News Digest newsletter, delivered each weekday. Automatically sign up today!By ...
- Tags: Eric Raymond, open source, Open Source Initiative, open-source license, OSI
- Technical articles 2005-02-02
- Sun license gets open-source nod
- Stay on top of the latest tech news with our free IT News Digest newsletter, delivered each weekday. Automatically sign up today!By ...
- Tags: UNIX, Operating systems, Servers, Linux, Sun Microsystems Inc., open source, Sun Solaris, CDDL
- Technical articles 2005-01-19
- Members demonstrate basic networking knowledge
- More than 1,800 TechRepublic members took our basic networking pop quiz. Did most know what BNC stands for? Do you? Find out in this week's Pop Quiz column.In my opinion, an understanding of basic networking concepts and components is essential for working an enterprise help desk. You don't need to...
- Tags: NETWORKING, Bill Detwiler, knowledge, network, BNC, OSI
- Technical articles 2002-04-26
- TechRepublic Tutorial: Document your network with help from the OSI model
- Use the OSI model to help your documentation effortI've talked to many network administrators over the years, and I've visited and consulted for a variety of operations that had anywhere from 10 to 600 clients. The one characteristic that all the organizations have had in common is the lack of...
- Tags: NETWORKING, Cindy Souders, MCSE, network, Data-Link Layer, OSI
- Technical articles 2002-03-27
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