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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. Introduction to OSI Model - Networkustad
    May 28, 2019 @ 7:15 am

    […] model.  But it is essential to know the model and its terminology because other models such as the TCP/IP model often compared to the OSI reference model. Hence the discussion on this model compared to the […]


  2. The Ethernet Frame Structure and Fields - Networkustad
    June 4, 2019 @ 7:46 am

    […] the Layer 3 PDU to encapsulate the message.  Ethernet-II is the Ethernet frame format uses in TCP/IP networks.  Ethernet frame starts with Preamble which works at the physical layer. Ethernet header […]


  3. Special-Purpose IPv4 Addresses » Networkustad
    June 29, 2019 @ 11:36 am

    […] address to direct traffic to itself. For example, we can use the loopback IP address to test if the TCP/IP configuration is operational or not.  Network software and utilities also use to access […]


  4. File Transfer Protocol (FTP) » Networkustad
    August 8, 2019 @ 3:45 pm

    […] and standard Internet protocol for transmitting files between computers on the Internet over TCP/IP connections. It is an application layer protocol. It was first created in 1971 to transfer data […]


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