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Asad Ijaz

My Name is Asad Ijaz Khattak and I am the writer and blogger, known for my website "". I have writes about various topics related to technology, networking, and cybersecurity. I am also a Cisco Certified Network Professional (CCNP) and Cisco Certified Network Associate (CCNA). I have written several articles and tutorials on the website which can be used as a learning resource for people interested in networking and cybersecurity. I am the member and Editor of Proudly Team NetworkUstad


  1. Ports Number » Networkustad
    August 2, 2019 @ 4:31 pm

    […] transport layer used two types of the ports number, the source port, and destination port. The source port numbers […]


  2. OSI Model including its 7 Layer Introduction » NetworkUstad
    May 22, 2021 @ 9:45 pm

    […] Where the upper layers related to applications and data within the host, the transport layer is concerned with the real end-to-end transfer of the data across the network. This layer establishes a logical connection between the two communicating hosts and provides reliable or unreliable data delivery and can give flow control and error recovery. Although not developed under the OSI Model and not strictly conforming to the OSI definition of the Transport Layer, typical examples of Layer 4 are the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Read More […]


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