Hill Associates - Living in a connected world : LAN

PodSnacks: IEEE 802.11g (54 Mbps)

Posted Monday, November 03, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Wi-Fi, PodSnacks, Internet, Wireless, Telecommunications, Technology, Physical Layer, Data Communications, LAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/802.11g.mp3

Today we'll continue our series looking at four of the transmission options for Wi-Fi wireless LANs by looking at IEEE 802.11g . This is the most commonly found Wi-Fi transmission rate today. As I prepared this snack for posting, I realized that Mark Read More...

PodSnacks: IEEE 802.11b (11 Mbps)

Posted Friday, October 31, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Wi-Fi, PodSnacks, Wireless, Telecommunications, Technology, Physical Layer, LAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/802.11b.mp3

Today we'll begin a series looking at four of the transmission options for Wi-Fi wireless LANs. Our first options is IEEE 802.11b . Although this is an older form of Wi-Fi, it is still broadly found in public hot spots. With its upper speed of 11 Read More...

PodSnacks: Bridge Protocol Data Unit (BPDU)

Posted Thursday, October 23, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q4/bpdu.mp3

The other day we talked about local area networks (LAN), and that brought to mind a little protocol we often find in LANs where we have multiple switches arranged in a redundant configuration. We call it the Spanning Tree Protocol (STP) , or more recently Read More...

PodSnacks: Local Area Network (LAN)

Posted Tuesday, October 21, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Wi-Fi, Ethernet, PodSnacks, Telecommunications, Technology, Physical Layer, Layer 2, Data Link Layer, Data Communications, LAN, Layer 1
Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q4/lan.mp3

Today we shift to a discussion I can't believe we haven't already had. We're going to talk about the lowly local area network (LAN) , which has seen a significant amount of evolution since my early days in networking! As always, you can listen Read More...

PodSnack: Media Access Control (MAC)

Posted Tuesday, September 16, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Wi-Fi, Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q3/mac.mp3

And now for something completely different, sort of. In recent days we've wandered from the Physical Layer to the Application Layer , so I thought we'd wander back down the stack for a brief visit at the Data Link Layer . Specifically, I thought Read More...

PodSnacks: Link Aggregation

Posted Thursday, June 19, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN, MAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q2/link_aggregation.mp3

Today we're going to head back to the world of Ethernet and discuss a concept related to inverse multiplexing : link aggregation . The concept is fairly simple: make two or more Ethernet links between two devices act as one higher-speed link. Still, Read More...

PodSnacks: Virtual LANs (VLAN)

Posted Monday, March 31, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN
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: Ethernet's CSMA/CD

Posted Wednesday, March 12, 2008 6:00 AM by mgilbert :: 0 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN
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
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN
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: IEEE Project 802

Posted Tuesday, January 22, 2008 6:00 PM by mgilbert :: 0 Comments
Filed under Wi-Fi, WiMAX, Ethernet, PodSnacks, Telecommunications, Technology, Physical Layer, Layer 2, Data Link Layer, Data Communications, LAN, Layer 1, PAN, MAN, Standards
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...

PodSnack: Ethernet

Posted Friday, November 23, 2007 6:00 AM by mgilbert :: 1 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Physical Layer, Layer 2, Data Link Layer, Data Communications, LAN, Layer 1

Ethernet certainly ranks as one of the most ubiquitous networking technologies in the world, along with the Internet Protocol (IP) and the public switched telephone network (PSTN). Today's podcast takes a look at Ethernet from a historical perspective, Read More...

PodSnacks: Token Ring

Posted Wednesday, November 14, 2007 6:00 AM by mgilbert :: 0 Comments
Filed under Telecommunications, Technology, Physical Layer, Layer 2, Data Link Layer, Data Communications, LAN, Layer 1
Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/token_ring.mp3

I'm feeling nostalgic today, so it's time for a Golden Oldey! Today we're going to talk about an essentially obsolete LAN technology called Token Ring . Token Ring began to disappear in the late 1990s, largely due to Ethernet 's broad Read More...

PodSnacks: Frame

Posted Wednesday, October 31, 2007 6:00 AM by mgilbert :: 0 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Physical Layer, Layer 2, Data Link Layer, Data Communications, LAN, Layer 1, Frame Relay, Fast Packet
Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/frame.mp3

Sometimes, I am amazed at the number of very basic concepts that we simply have not talked about in this series. One of those jumped out at me as I was doing some update work on our wiki . We use the term frame all of the time, but we have never really Read More...

PodSnacks: Spanning Tree Protocol

Posted Thursday, September 27, 2007 7:00 AM by mgilbert :: 0 Comments
Filed under Ethernet, PodSnacks, Telecommunications, Technology, Layer 2, Data Link Layer, Data Communications, LAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/stp.mp3

Well, I guess I opened the door with yesterday's PodSnack on Transparent Bridging (TB), so I suppose I should walk through it today. We wrapped up yesterday's snack with a reference to something called the Spanning Tree Protocol (STP). This is Read More...

PodSnacks: IEEE 802.11g

Posted Wednesday, August 01, 2007 5:32 AM by mgilbert :: 0 Comments
Filed under Wi-Fi, PodSnacks, Internet, Wireless, Telecommunications, Technology, Physical Layer, Data Communications, LAN
Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/802.11g.mp3