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Questions tagged [application-layer]

48 questions
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Network example - IP address

I just started to learn about networking and follow the book by Kurose and Ross. They have the following snippets of python code to illustrate the UDP protocol. The code for the simple client is given by from socket import * serverName = ‘hostname’ …
Alex
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How to know the application layer protocol in TCP?

I watched in wireshark that there's no dedicated field to identify the application layer protocol,but how does wireshark do that?
compile-fan
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What application layer protocol is being used when using sockets?

When using web browsers, the application layer protocol being used is HTTP. Whereas I frequently use sockets to create a connection to a server and pass along strings, a frequently used example in Python could be import socket clientsocket =…
J.Doe
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Changing the output DTO (return value) of the GetAll method in an AsyncCrudAppService

I'm using ABP's AsyncCrudAppService in my AppServices. Here's my interface: public interface IAssetRequisitionAppService : IAsyncCrudAppService
Emre Can Serteli
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Responsibility of communicating between aggregates with domain events (DDD)

General question: Who is responsible for handling events included in a single command? Simplified example Two aggregates are given: User and Game. To start a Game with the StartGame-command, both Users have to accept. In terms of my domain-driven…
Luca Nate Mahler
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Real Time API using JSON

I wish to send commands on a web socket to the backend. I was thinking my protocol should look like this: Send: {cmd: "login", data: {user:"Me",id:99}} Reply: {cmd: "login", data: "OK"} Send: {cmd: "join sensors", data: {group:1}} Reply: {cmd:…
Baz
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Should An Application Service Be Injected Into A Domain Service

I am working on a WinForms application using Entity Framework 6 with the following layers: Presentation Application Domain Infrastructure When a user clicks the save button from the UI, it calls an application service in the Application layer and…
Robertcode
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Linq To Sql - Making a dynamic search for the Application layer without exposing DAL layer as DLL

Linq to SQL, C#. I have 3 layers: DAL,BL,Application. I want to build functions of search in the BL for each table so those functions get as a parameter 'where' expresstion from the Application layer. The advantage in this approach is one function…
Stav Alfi
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What Protocol do Terracotta and Quartz Scheduler Nodes use?

I am using Quartz Scheduler with TerracottaJobStore and I'm trying to figure out which protocol the Scheduler Nodes and Server use to communicate. To explain it another way, in a web application setup, the Browser (client) communicates with Apache…
Hitesh
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How to create two nodes, each containing three layers (PHY, MAC, APP) in OMNeT++?

How to create two nodes, each containing three layers (PHY, MAC, APP) in OMNeT++? There should be at least two applications at each node. There should also be a wired or wireless connection among these nodes. Please help in defining the layers. I am…
user18395909
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UDP Broadcast to all nodes

I am trying to solve OMNET++ Ad hoc wireless UDP message to all nodes. My config file is as:
Rida Hanif
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UDP Broadcast Messages to all nodes in OMNET++

I am using OMNET++ INET for Ad hoc networks. I want to broadcast my message to all my neighbors in UDP. I have tried all the possible solutions in UDPBasicApp. It broadcasts a message to one node at a time which it chooses randomly if the…
Rida Hanif
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How to avoid services in DtoMappers layer

Good day, I have a Spring Boot based backend , we are using own library to convert JPA entities to Dto's (library works based on reflection). The problem is , we inject service layer directly to some mappers. Let's say I have a UserEntity and…
Almas Abdrazak
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Using Postgres' external procedural languages over application code

I am trying to figure out the advantages and disadvantages of using non-plpgsql procedural languages (PL/Python, PL/Perl, PL/v8, etc.) to implement data manipulation logic on the database level instead of going up to model level/ORM of the…
Big Monday
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How to detect packets using http or other application layer protocols?

I am writing a program which can detects protocols used in network packets. For every packet receives it will try to detect protocols in layers such network and transport. Detecting protocols in these two layer was very easy because somewhere in…
Amir reza Riahi
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