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PodSnacks: Link State Database (LSDB)

Posted Tuesday, April 29, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q2/lsdb.mp3
Enough of the basics! For today, we're going to give the more technically oriented members of our audience a little something to chew on. Our topic today comes from the world of routing , specifically, OSPF . We're going to talk about a construct Read More...

PodSnack: The Routing Hierarchy

Posted Friday, April 11, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/routing_hierarchy.mp3
Recently, Michel and Trevor walked you through the routing-related concept of an administrative distance. At the conclusion, they made reference to routing hierarchies, and promised to cover it in another PodSnack. We'll, today's the day. Pull Read More...

PodSnacks: Administrative Distance (Routing)

Posted Wednesday, April 09, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/administrative_distance.mp3
Today we're going to spend a bit of time with a concept associated with routing and somewhat associated with routing protocols . The concept for today is administrative distance . To a router, an administrative distance is a measure of trust. If the Read More...

WiMax, IT, IPv6, and Net Neutrality

Posted Thursday, April 03, 2008 1:55 PM by mgilbert :: 0 Comments
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You don't really expect me to link those together, do you? I suppose I could. Maybe all of those WiMax systems will need to be IPv6 compliant, and they will create yet another source of traffic overload that will re-spark the net neutrality debate, Read More...

PodSnacks: NAT vs. NAPT

Posted Monday, March 24, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/nat-napt.mp3
Network Address Translation (NAT) and Network Address Port Translation (NAPT) can be confusing concepts, especially since most people are doing NAPT and calling it NAT. In today's PodSnack, Michel explains the concepts to you. You can listen to (or Read More...

From IP over Everything to Everything over IP

Posted Wednesday, March 19, 2008 5:43 AM by mgilbert :: 0 Comments
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When the Internet Protocol (IP) was first created, the mantra was "IP over everything," a joke that took me 15 years to get! They even had T-shirts made up. After all, that was the Great Insight: if you wanted computers connected to different Read More...

PodSnacks: Routers vs. Layer 3 Switches

Posted Monday, March 17, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/layer-3-switch.mp3
The role of a router is relatively simple: it routes packets and operates at Layer 3 of the OSI Reference Model . This industry, however, is never content to leave anything simple. Enter the Layer 3 switch to muddy the waters. In today's PodSnack, Read More...

PodSnacks: Regional Internet Registry

Posted Tuesday, March 04, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q1/rir.mp3
It is very important that every device connected to the Internet have a unique address. If there is any address duplication, the network will become confused and packets will not get to their destination. To ensure this, a hierarchical addressing authority Read More...

PodSnacks: BGP and YouTube

Posted Thursday, February 28, 2008 6:00 AM by mgilbert :: 1 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q1/bgp_youtube.mp3
YouTube recently had an outage that was related to Pakistan. Sound a bit odd? It's also a good story to understand a little bit about routing in the Internet and how it can go wrong. Basically, in an effort to prevent Pakistanis from being able to Read More...

PodSnacks: Routing Protocols

Posted Monday, February 25, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/routing_protocol.mp3
We've been discussing IP addressing issues (among other things), so why not spend a bit more time in Layer 3 ? Today's subject is related to routers , and the key to their intelligence: the routing protocol . Michel will take you through the basic Read More...

BGP Announcement Turns off YouTube

Posted Sunday, February 24, 2008 10:47 PM by thindson :: 1 Comments
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Apparently Pakistan was not happy with some of the content on YouTube. Its answer was to announce a specific route for the YouTube address, which they redirected elsewhere. Turns out PCCW, a large Internet service provider, let YouTube announce this very Read More...

PodSnack: Classless Interdomain Routing (CIDR)

Posted Friday, February 22, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/cidr.mp3
We have one final piece of the IP address puzzle to fit in. It's called Classless Interdomain Routing (CIDR). CIDR is release from bondage! It is the elimination of classes in the IP address space. An important roll of the technique is to summarize Read More...

PodSnacks: Variable Length Subnet Mask (VLSM)

Posted Wednesday, February 20, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/vlsm.mp3
An exploration of the IP address and subnet masking , is not complete without a look at variable length subnet masking (VLSM). Michel explores the role of the mask in partitioning a network, and the flexibility introduced by being able to vary the length Read More...

PodSnacks: IP Addressing

Posted Friday, February 15, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/ip_address.mp3
Let's shift from the OSI Reference Model to a particular protocol suite: TCP/IP . There's lots of ground to be covered there, so we need a focus. We're going to narrow in on Layer 3, which is mostly about the Internet Protocol (IP), the packet Read More...

PodSnacks: Network Layer (Layer 3)

Posted Monday, February 04, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/network_layer.mp3
Today we continue a series on the OSI Reference Model with a move up to Layer 3. Michel talks to you about the layer also known as the Network Layer . This is a critical layer in the model. It is, in a very real sense, the glue that binds the network Read More...
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