Application Layer [rss]

PodSnacks: Simple Network Management Protocol (SNMP)

Posted Monday, July 21, 2008 6:00 AM by mgilbert :: 1 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q2/snmp.mp3
Today, we're responding to a request for information about the Simple Network Management Protocol (SNMP). This is a critical protocol for any IP -based network. It defines how managers (software with a supervisory function) communicate with agents Read More...

PodSnacks: Root Name Server

Posted Thursday, July 17, 2008 6:00 AM by mgilbert :: 1 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q3/root_name_server.mp3
We recently did a PodSnack on the top-level domain (TLD) structure in DNS . In that PodSnack, I made reference to the root name server s in the Internet, and promised to explain it in another PodSnack. Well, there's no time like the present! Tune Read More...

PodSnacks: Top-Level Domain (TLD)

Posted Tuesday, July 15, 2008 6:00 AM by mgilbert :: 1 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q3/tld.mp3
You use DNS every day, and probably never think about it. You most likely don't even think of what happens when you type in (or click on) a name like www.hill.com . What happens, however, is a relatively straightforward process of mapping the name Read More...

PodSnacks: Application Services Layer

Posted Thursday, July 10, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q3/application_services_layer.mp3
Today we go back to the world of network models and architectures, and we take a quick look at the highest layer of the four-layer TCP/IP model: the Application Services Layer . This is the layer that is concerned with the various tasks we are trying Read More...

PodSnacks: Extensible Markup Language (XML)

Posted Wednesday, July 02, 2008 6:00 AM by mgilbert :: 1 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q2/xml.mp3
One of the core concepts underlying the World Wide Web is the concept of a markup language. Markup languages are programming languages used to provide information about information: a form of metalanguage. Confused? Take a listen and Michel will explain Read More...

PodSnacks: Peer-to-peer vs. Client/server

Posted Tuesday, April 15, 2008 6:00 AM by mgilbert :: 1 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q2/p2p.mp3
Over the past several weeks, there has been a lot of talk about Comcast, and other ISPs , that were attempting to get bandwidth under control by throttling users or explicitly interfering with peer-to-peer (P2P) file sharing. I thought this might be a Read More...

PodSnacks: World Wide Web

Posted Monday, April 07, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/www.mp3
We use it every day. You're using it now (if you're reading our blog)! Some even think that the World Wide Web is the Internet . It's not. It's actually just one of many applications that can be accessed via the Internet, or ride on the Read More...

PodSnacks: Domain Name System

Posted Monday, March 10, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/dns.mp3
We humans like words and names. Computers can deal with words and names, but they tend to deal with numbers. In fact, most addresses at the lower layers are numerical. I don't know about you, but I have a hard time remember a handful of phone numbers. Read More...

PodSnacks: Application Layer (Layer 7)

Posted Wednesday, February 13, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/application_layer.mp3
Today we top-off the OSI Reference Model with a look at Layer 7, also known as the Application Layer . Together with the Presentation Layer , this Layer deals with the interoperability issues of networking. It provides basic services to the applications Read More...

PodSnacks: File Transfer Protocol

Posted Monday, January 07, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/ftp.mp3
Ever notice that sometimes that URL in your browser's address bar starts with ftp:// insteadof http:// ? Your browser is going to use the File Transfer Protocol (FTP) instead of the HyperText Transfer Protocol (HTTP) to get that file. FTP is an old, Read More...

PodSnack: Email

Posted Thursday, January 03, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/email.mp3
Email is one of the longest-lived applications on the Internet , and it remains one of the most widely used. In today's PodSnack, Mark and Michel take you on a trip to the world of email, explaining how the basic system works and what protocols are Read More...

PodSnacks: Network Management System

Posted Thursday, December 27, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q4/nms.mp3
When networks are critical, management becomes essential. In today's PodSnack, Michel will take you through the basic elements of a modern network management system (NMS) You can listen to (or download) today's featured PodSnack by clicking here Read More...

PodSnacks: Uniform Resource Locators (URL)

Posted Tuesday, November 27, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/url.mp3
We use them every day: those pesky strings of text that we type into our browser address bar. They are known as Uniform Resource Locators , or just URL. Some of them can be very convoluted. So what do they mean? How come I type just www.hill.com and end Read More...

PodSnacks: IPT vs. VoIP

Posted Wednesday, November 21, 2007 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q1/voip-vs-ipt.mp3
The world is abuzz about convergence . Actually, it's been abuzz for quite some time, so we're all a bit dizzy. However, convergence (which is partly about the bringing together of voice, video, and data into common networks, services, applications, Read More...

PodSnacks: Network Time Protocol

Posted Monday, September 24, 2007 7:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/ntp.mp3
One of the difficulties network administrators have in managing a network is coordinating network failure events. A single failure can create a multitude of effects within a network, but if the devices don't use a common time stamp, correlating these Read More...
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