Tag: UDP

Forwarding UDP broadcast traffic mechanisms

We will speak here about some basics about Forwarding UDP broadcast traffic. If you were wondering what Forwarding UDP broadcast traffic actually is I will try to explain it here in few words.

If you have more that one broadcast domains in your local network, let’s say that you have three VLANs. In normal networking theory it’s normal that broadcast initiated on host inside one VLAN will get to all host inside that VLAN but it will not get across to other VLAN. Typically the broadcast domain border is router or a Layer’s 3 switch VLAN interface. Although this is normal for most of broadcast traffic there needs to be a way to forward some kinds of broadcast traffic across that border. Why? Here’s a simple example. If you use DHCP, and you are, you will probably have hosts in different VLANs and all of them need to get the IP address from DHCP. If Forwarding UDP broadcast traffic didn’t exist it will be needed to have one DHCP server on every VLAN. Remember that DHCP works using broadcast traffic in some of the steps.

Simple DHCP address leasing:

Host that connects on the network will in the first step send broadcast DHCP discover message in order to find where the server is or if the server actually exist. After the HDCP replies with unicast DHCP offer host will one again use broadcast to send DHCP request to server. Server will then acknowledge the IP address leasing with unicast ACK message and that’s it.

 DHCP steps

Forwarding UDP broadcast traffic

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DCCP – Datagram Congestion Control Protocol

DCCP transport layer protocol is used to control the datagram congestion. It provides an excellent procedure to stop the internet fall down, if it is caused by the congestion. In fact, this protocol is a brilliant competitor to be used as a substitute of UDP protocol.

DCCP account DCCP congestion control trait by means of a reliable acknowledgments delivery (in form of packets instead of bytes) will provide actually a congestion control with dynamism. DCCP will also make available the negotiable blocking control mechanism, but it will be up to the particular application’s specific requirements too. Moreover, these mechanisms come with a number of specific features, so to go well with different types of applications. The bandwidth consumption can be enhanced as the size of packets in case of DCCP is increased.

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UDP – User Datagram Protocol

Let’s see what is UDP – User Datagram Protocol. Inside the computer world, term “networking” is denoted to the physical joining of two machines for different purposes like communication and data distribution. But mesh of this hardware and computer’s software can communicated with each other with the help of specially designed protocols. Moreover, computer networks can be categorized on the basis of such communication languages (protocols) used by a network.

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What is a protocol?

What is a protocol?What is a protocol? If you arrived until this part of the article, this means that you probably have heard before of something that is called protocol. The first thing to know is that there are a bunch of protocols, not only one, and that every protocol has a bunch of rules inside him. Let’s take a real world example. Knowing how to drive your car from one point to another is a form of making a complete action.

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