network-protocols

Background There is a well-known tool called Wireshark . I've been using it for ages. It is great, but performance is the problem. Common usage scenario includes several data preparation steps in order to extract a data subset to be analyzed later. Without that step it takes minutes to do filtering (with big traces Wireshark is next to unusable). The actual idea is to create a better solution, fast, parallel and efficient, to be used as a data aggregator/storage. Requirements The actual requirement is to use all power provided by modern hardware. I should say there is a room for different

Is SMTP based on TCP or UDP ? I really can't confirm it . In my opinion, SMTP should be based on UDP, but someone told me that is must be TCP. In theory SMTP can be handled by either TCP, UDP, or some 3rd party protocol. As defined in RFC 821 , RFC 2821 , and RFC 5321 : SMTP is independent of the particular transmission subsystem and requires only a reliable ordered data stream channel. In addition, the Internet Assigned Numbers Authority has allocated port 25 for both TCP and UDP for use by SMTP. In practice however, most if not all organizations and applications only choose to implement the

What are the alternatives to HTTP (per XMLHttpRequest ) when establishing a server connection in JavaScript? The only one I know is the WebSocket protocol (per WebSocket ). Their corresponding secure variants https and wss included. Would it be possible to choose an arbitrary protocol with JavaScript? How do you communicate with NTP, IMAP, UDP etc. -services for example in Node.js? From Node.js, you can do pretty much anything. E.g. UDP is directly supported ( dgram module which is shipped with node.js), and npm has a plethora of third-party modules for many other protocols, such as SMTP, IMAP

SCTP has native multi-homing support which if I understand it correctly will automatically reroute your packets over a secondary NIC if the primary interface goes down. I duplicated this functionality with TCP by writing a custom routing deamon to modify the routing tables if my primary NIC goes down. I would like to try using SCTP instead. In Steven's Unix Network Programming V1 3rd Edition on page 288 it says: For this example, we use a one-to-many-style server. We make this choice for one important reason. The examples in Chapter 5 can be modified to run over SCTP with one minor change:

I am currently trying to figure out how sms classes are correctly represented in SMPP. However I am by now completely confused by the standard and it's documentation. In normal sms we have Class0: Flash sms, which are shown on the display Class1: Normal Sms to be stored on the sim or internally in the device Looking at the SMPP spec, I first find the parameter data_coding in the submit_sm operation, which is used to set the DCS sent via MAP. As far as I understand this, if we want to explicitly set the message class we need to set the first four bits of this parameter to ones, then two bits