DNS port is confusing for many people. In this article, we’ll describe how DNS works, and what DNS port numbers are used for DNS protocol. Port Usage TCP port 53: Large DNS responses (TCP is used when the DNS response…
TCP is defined as a connection-oriented and reliable protocol. We will check out how TCP connection works in this article. How TCP Connection Works? TCP allows for the transmission of information in both directions. This means that computer systems that…
TCP vs UDP – Acronym TCP vs UDP – Connection TCP vs UDP – Protocols TCP vs UDP – Packet Order Packets are carried over Internet Protocol (IP), which pays no attention to packet order. TCP vs…
TCP Sequence Number is a 4-byte field in the TCP header that indicates the first byte of the outgoing segment. It helps to keep track of how much data has been transferred and received. The TCP Sequence Number field is…
TCP socket is a fundamental concept in the operation of TCP/IP application world. We will deep dive into the details of how the TCP socket works. Network Socket For example, if we have a website running on IP address 100.1.1.1,…
tcpdump is a powerful command-line network packet analyzer used for network troubleshooting and analysis. To capture UDP packets using tcpdump, you can use specific filtering options to narrow down the traffic you want to capture. UDP Protocol UDP is a…
Tcpdump is a CLI tool to capture raw network packets. It is very useful for various forms of network troubleshooting. We will learn how to filter packets by port in tcpdump command. TCP and UDP Ports Our system uses ports…
Portmap is a service that converts RPC program numbers into protocol port numbers. It must be running in order to make RPC calls. Portmap makes the dynamic binding of remote programs possible. NFSv3 is based on portmap. We will dive…
The rpcbind is a utility that converts RPC program numbers into universal addresses. It must be running on the host to be able to make RPC calls. We will dive into RPCbind today to see how it works. Understanding RPC…
Network File Sharing (NFS) is a protocol that allows us to share directories and files with other Linux clients over a network. The ports for NFS are confusing for many people. We will deep dive into this today. NFSv3 Port…
