Troubleshoot network with wireshark Archives - Telecom Academy
VoIP: SIP, MGCP, RTP, H.323
VoIP: SIP, MGCP, RTP, H.323

VoIP Voice over Internet Protocol (VoIP) is a method to carry voice traffic digitally over a network. Initial providers release services that emulate the traditional phone systems, changing out analog lines for digital. More recently, call services like Skype have started offering new alternatives.Session Initiation Protocol is a signaling and control protocol for communications. It is most commonly used for voice and video […]

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Difference Between DNS and NetBIOS
Differnece between dns and netbios

DNS (Domain name system) The DNS Domain Name System is what translates your favorite domain names into IP addresses. It was first designed at the University of California Irvine in 1983. It is designed to be a hierarchical distributed system. It’s capable of translating the massive amounts of requests required by the internet or within a small private network. If a client wants […]

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Difference between Packets and Frames
Packets and Frames

Frames is the last PDU used before information is put on the wire for transmission. Packets are formed of control information and the payload. When working with addressing and information flow, I tend to spend a significant amount of time in layers two and three, which are data link and network, respectively. Layer two refers to communication between devices on a common […]

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Connection-oriented and Connectionless Protocols
Connection-oriented and Connectionless Protocols

TCP and UDP utilize the two connection types. Connection-oriented and connectionless. TCP is considered connection-oriented. This means it uses a system to provide reliable delivery of traffic. TCP utilizes a system known as the three way handshake to establish connections. Before a connection is considered established both hosts need to send and receive a send packet, and an ACK packet. Technically this could be […]

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Understanding ARP (Address Resolution Protocol)
Understanding ARP (Address Resolution Protocol)

ARP (Address Resolution Protocol) The ARP command is a tremendous troubleshooting tool for ARP issues as well as layer two troubleshooting. ARP stands for Address Resolution Protocol and is responsible for doing the layer three IP mapping to layer two MAC addresses. Whenever a computer needs to send information to another host on a directly connected subnet, it will first check its […]

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What is SSH? How to configure SSH?
What is SSH - How to configure SSH

What is SSH? SSH, or Secure SHell, is a protocol for connecting from one computer to another, usually in order to use the Command-line interface, or Command Shell on a remote system. It’s very widely for system administration such as software update, configuration management, and deployment on Linux and Mac OS X machines. you may also like:   What is telnet? Usage […]

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What is telnet? How to configure telnet?
What is telnet? How to configure telnet?

A very useful tool with unexpected results is Telnet. By default it isn’t installed on Windows anymore, but a simple Google can give you the steps to install. On Windows 10, I can enter a simple command line statement to install it. The ISM /online /Enable-Feature/FeatureName:TelnetClient. All right. Now that I’ve got the “operation completed successfully” message, I’ll go ahead and clear the screen. […]

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