udp – POFTUT

What Is OSI (Open Systems Interconnection) Model?

What Is OSI (Open Systems Interconnection) Model?

Open Systems Interconnection Model or OSI Model is an architecture to specify computer networks functions in a clear and compatible way. OSI provides interoperability of diverse communication systems with standard communication and transmission architecture, layers, and protocols. OSI History In the early- and mid- 1970s the computer networks largely owned and operated by the governments … Read more

How To “netsh winsock reset” To Fix Windows Network Problems?

How To "netsh winsock reset" To Fix Windows Network Problems?

Windows operating system uses Winsock technology in order to maintain network and internet communication and connection. During the usage of the Winsock especially in heavy usage, it may create network and internet connection problems because of the crash. In this tutorial, we will learn how to reset the network adaptor and TCP/IP network stack via … Read more

SNMP Port Number Tutorial with Examples

SNMP Port Number Tutorial with Examples

Simple Network Management Protocol aka SNMP is used to monitor and manage devices over the computer networks. SNMP is popularly used to monitor network devices. SNMP protocol communication is done over the SNMP ports which can be different according to operation and security. SNMP Ports SNMP uses UDP 161 by default. UDP is an alternative … Read more

What Is A Firewall and How Its Work?

Today Firewall is depicted as the main component of the security and networks. Firewalls provide a lot of different operations and features. In the old days, the firewall was simply used to block or allow some ports and management of the NAT. These days there are a lot of different threats where the firewall is … Read more

What Is NAT (Network Address Translation) and How It Works?

Network Address Translation a.k.a. NAT is a process or technique used to change IP address and TCP port numbers by an intermediate device like firewall, router, modem, etc. There are different use cases for NAT but the most popular one is to use a single WAN IP address for multiple servers and clients which is … Read more

What Is DNS Server Or Protocol Port Number?

Domain Name System aka DNS is used to match domain names to the IP addresses. DNS is provided over the intranet and internet servers with different port numbers.DNS can use both transmission protocols TCP and UDP. But general usage is over UDP protocol because of its simplicity and speed. TCP Port 53 One of the … Read more

How To Flush DNS and Reset TCP/IP with ipconfig /flushdns Command In Windows

DNS is used to translate between a human-readable name like poftut.com and IP address like 45.79.1333.118. DNS can use both UDP and TCP protocols but generally, UDP protocol is preferred. In this tutorial, we will learn how to flush, clear the DNS cache with ipconfig /flushdns command. This tutorial can be applied to the All … Read more

What Is Socket In Linux?

What Is Socket In Linux?

The socket is a mechanism that provides a connection between the two-processor system by using network stacks. In a more clear way, we can use sockets to communicate and transfer data between two systems. As we know Unix and Linux systems work on file logic. Everything in the operating system is a file where network connections … Read more

How To Scan All TCP and UDP Ports with Nmap?

How To Scan All TCP and UDP Ports with Nmap?

Nmap is a very useful and popular tool used to scan ports. Nmap by default scans the most popular 1000 ports. We may need to change the port range and protocol type to all while scanning with Nmap. Scan All TCP Ports with Range We can specify the port range with the -p option. As we … Read more