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PodSnacks: The Chained Layers

Posted Thursday, April 24, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q2/chained_layers.mp3
Back to the OSI Reference Model for a moment. You may sometimes hear reference to the chained_layers . This is a reference to the first three layers of the model, so named because chaining them together creates the fabric of an inter-network. In today's Read More...

PodSnacks: Virtual Circuit (VC)

Posted Friday, April 18, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/virtual_circuit.mp3
Packet networks come in two basic flavors: datagram or virtual circuit . Today, Mark is going to walk you through the definition of a virtual circuit, and examples of places where you can find them. You can listen to (or download) the PodSnack by clicking Read More...

PodSnacks: Asynchronous Transfer Mode

Posted Wednesday, April 02, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/atm.mp3
A few weeks ago, we looked at Frame Relay. I suppose it makes sense to take a bit of time and explore asynchronous transfer mode (ATM). In today's PodSnack, Mark walks you through the basics. You can listen to (or download) the PodSnack by clicking Read More...

PodSnacks: Virtual LANs (VLAN)

Posted Monday, March 31, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/vlan.mp3
Hill Associates' instructors are famous for defining the word "virtual" as "whatever follows it is a lie." Enter the virtual LAN . Apparently the LAN part is a lie. In today's PodSnack, Michel explains it to you. You can listen Read More...

PodSnacks: Data Over Cable Service Interface Specification (DOCSIS)

Posted Thursday, March 27, 2008 6:00 PM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q1/docsis.mp3
The title of our PodSnack for today is a mouthful, but the concept is not so complex. When the cable companies decided to use their video networks to deliver other services, they needed new technology. Specifically, they needed the protocols and equipment Read More...

PodSnacks: Addresses

Posted Friday, March 21, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/addressing.mp3
Sometimes we go for deeply technical topics. Sometimes we just go back to basics. Today is a back to basics day. In today's PodSnack, Dave takes you through the concept of addressing . You can listen to (or download) the PodSnack by clicking here Read More...

PodSnacks: Ethernet's CSMA/CD

Posted Wednesday, March 12, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/csma-cd.mp3
Ethernet has been around since the mid 1970s. Since that time, it has gone through four distinct generations. It began as a coax-based broadcast network, became a hubbed broadcast network, shifted to being a switched architecture, and now incorporates Read More...

PodSnack: Bridging versus Switching

Posted Friday, March 07, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/bridging-switching.mp3
Today we're going to head in a completely different direction. When we teach data courses, we often find ourselves in a discussion about Ethernet and the role of Ethernet switches. When you begin to examine the standards, you find constant reference Read More...

PodSnacks: Ethernet Addressing

Posted Wednesday, March 05, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/ethernet_addressing.mp3
Recently, we looked at Frame Relay addressing, so we might as well stay with the theme and take a look at another form of addressing : Ethernet . In today's PodSnack, Dave takes you through the structure of the Ethernet address . You can listen to Read More...

PodSnack: Frame Relay Addressing

Posted Monday, March 03, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/frame_relay_addressing.mp3
Since we're talking about Frame Relay , might was well spend a bit of time looking at frame relay addressing . In this PodSnack, Dave takes you through the structure of the address field and then focuses in on the DLCI. You can listen to (or download) Read More...

PodSnack: Frame Relay

Posted Friday, February 29, 2008 1:50 PM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/frame_relay.mp3
We're all running a bit ragged at Hill Associates right now, so I thought I'd stick with something simple: Frame Relay . Although under pressure now from Ethernet and IP-based services, and saddled with the prefix "legacy," Frame Relay Read More...

Battle of the Titans

Posted Friday, February 22, 2008 5:58 AM by mgilbert :: 0 Comments
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Once upon a time there was a major player in routing . They were known as Cisco and all others were but a pale shadow compared to their market position. Where Cisco touted double digit penetration, others could only boast single digit penetration. And Read More...

PodSnacks: Store-and-Forward Switching

Posted Tuesday, February 19, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q1/sf_switch.mp3
Now let's go back to basics again. We've talked before about circuit switching but we haven't really talked about packet switching . The packet switch uses a different strategy for manipulating traffic: it uses a technique called store-and-forward Read More...

PodSnacks: Data Link Layer (Layer 2)

Posted Friday, February 01, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/data_link_layer.mp3
In our continuing series on the OSI Reference Model , today we move up to Layer 2. In today's PodSnack, Michel talks to you about the Data Link Layer . This is one of the OSI Reference Model Layers that has seen some change since it was originally Read More...

PodSnacks: IEEE Project 802

Posted Tuesday, January 22, 2008 6:00 PM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q1/ieee802.mp3
And now for something completely different, let's chat a bit about a set of standards that are important to all of us: the set of standards known collectively as IEEE Project 802 . These are important to us because within this set of standards we Read More...
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