TCP/IP [rss]

PodSnacks: Session Initiation Protocol (SIP)

Today, Paul gets back into the mix and talks to us a bit about the Session Initiation Protocol (SIP). As the name implies, this TCP/IP protocol is designed to establish sessions between two systems, and to negotiate the parameters of these sessions, in Read More...

PodSnacks: Simple Network Management Protocol (SNMP)

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

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)

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

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: Multiprotocol Label Switching (MPLS)

Well, we've been threatening to do this for a while, so today is MPLS day. Tune in as Michel explains the basic concepts. You can listen to (or download) the PodSnack by clicking here , or you can use the Flash player below. If you have an idea or Read More...

PodSnacks: Internet Control Message Protocol (ICMP)

Did you know that IP talks to itself? In many instances, when something goes wrong inside an IP network, there are small control messages generated that provide information about what happened. The same protocol that accomplishes this can also be used Read More...

PodSnacks: Network Interface Layer

Today we go back to the world of network models and architectures, and we take a quick look at the lowest layer of the four-layer TCP/IP model: the Network Interface Layer . It's not the most exciting thing we could talk about, but it is, in essence, Read More...

PodSnacks: Virtual Private Network (VPN)

Our series on routing protocols is essentially complete, although we are likely to come back and fill in some technical details. We have some outstanding requests for information on MPLS and BGP. For now, however, let's go back to a few basics. In Read More...

PodSnacks: Enhanced Interior Gateway Routing Protocol (EIGRP)

Our series on routing protocols concludes as we explore a hybrid routing protocol from Cisco. Michel takes you through a description of the Enhanced Interior Gateway Routing Protocol . You can listen to (or download) the PodSnack by clicking here , or Read More...

PodSnacks: Open Shortest Path First (OSPF)

Our series on routing protocols continues as we explore a link state routing protocol. Today, Michel and Trevor give you a fairly solid description of the Open Shortest Path First . You can listen to (or download) the PodSnack by clicking here , or you Read More...

PodSnacks: Routing Information Protocol (RIP)

In our continuing series on routing protocols , we move on to a vintage distance vector routing protocol. Today, Michel and Trevor give you a fairly solid description of the Routing Information Protocol . You can listen to (or download) the PodSnack by Read More...

PodSnacks: Border Gateway Protocol (BGP)

Recently, Mark and Trevor gave you definitions of interior and exterior routing protocols . We then looked at two broad classes of routing protocols: distance vector and link state . Today, Michel and Trevor give you a high-level description of the exterior Read More...

PodSnacks: Link State Routing Protocols (LSRP)

Last Friday, in our continuing series on routing protocols , we discussed distance vector routing protocols . The second major class of routing protocols is the link state routing protocol . Today, Michel and Trevor are going to talk to you about this Read More...

PodSnacks: Distance Vector Routing Protocols (DVRP)

In our continuing series on routing protocols , we now shift to two broad classifications of routing protocols that are based on what the routing protocol includes in its update and where it sends that update. Today, Michel and Trevor are going to talk Read More...
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