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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. LLC and MAC sublayer Important Functions » Networkustad
    June 21, 2020 @ 6:51 pm

    […] Connectionless service is also known as the best effort service e.g. IP datagram service, without prior connection establishment between source and destination and without acknowledgement. In the connectionless service, the data is sent to the peer directly without any connection establishment. The connectionless service is also unreliable because reliability, flow control and error control are provided at the transport layer. It is provided flow control optionally. […]


  2. HDLC Encapsulation Protocol – NetworkUstad
    September 14, 2021 @ 9:31 pm

    […] (SDLC) and became standardized by ISO as ISO 13239. It provides both connection-oriented and connectionless service. HDLC also provides flow control and error control by using […]


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