Questions tagged as 'redes'

Tagged questions
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Why does the decrease of the subnet mask double the original network size?

Reading about IP protocol and about network addressing, I did not understand why the " decrease " of the subnet mascara size in 1 bit , generates a " > increase "of the size of the network. I understood the reason for the increase, but not...
asked by 29.11.2017 / 20:22
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Check which processes are connected to the internet

Is it possible to check which processes are connected to the internet and what is your destination?     
asked by 25.11.2014 / 19:12
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I can not access localhost on another machine on the network

I'm trying to access localhost (ip: 192.168.0.11) through another machine on the network. Start Apache with access on port 8080 (with EasyPHP Devserver 16.1) and type in the browser of another network machine (ip: 192.168.0.15) the address " . T...
asked by 10.05.2016 / 15:17
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How to find the cause of the discarded packages and with error [closed]

My network is a bit slow today. Taking a look at the interfaces I saw that% w_that is the internal network there is a lot of error and discards. ifconfig eth1 eth1 Link encap:Ethernet Endereço de HW 00:1a:3f:79:ae:ac inet end...
asked by 18.12.2015 / 14:44
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What is the difference between socket and port?

Developing a service-oriented app , I came across the following question: What is the difference between port and socket within the computational structure?     
asked by 21.02.2018 / 03:59
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Checking a DoS / DDoS (Denial of Service) attack on a network dump (PCAP file)

from scapy.all import * import dpkt f1 = open("semAtaque.pcap") pcap = dpkt.pcap.Reader(f1) f1.close() f2 = open("Ataques.pcap") pcap = dpkt.pcap.Reader(f2) f2.close() I have two network traffic captures for a lab experiment: one free of att...
asked by 10.03.2017 / 18:51
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Tracert or Traceroute in Java, without calling the OS

I'm developing a web application that will test the servers and bring the result equal to a tracert of Windows or traceroute of Linux. I'm developing in Java and using the above commands as follows: I identify the server and cal...
asked by 24.11.2014 / 19:55
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Calculation of the Shannon entropy in a network traffic (saved in CAP file) using Python

I have a dump file (CAP format) of a network traffic capture made with the Ubuntu tcp dump. Until a certain time, it is attack-free traffic. Then a series of TCP SYN flooding attacks begin. My goal is to calculate the entropy of each of the traf...
asked by 01.03.2017 / 15:17
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Comparison between FTP and HTTP for file transfer

One question that intrigues me is the transfer of binary files over the internet. I have experience in using FTP, which eventually went through firewall problems with clients. Another issue defended by sysadmins was about the lack of security...
asked by 24.03.2017 / 18:31
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What are Network Mask, Gateway, and how do they relate to the modem / router? [closed]

I think the most accurate question would be: "How does a client / host connection occur from the outgoing client packet, through the internal network, through the modem to the host, and exactly where does the role of each items in this process?...
asked by 28.05.2015 / 05:11