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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. Serial Communication – NetworkUstad
    September 14, 2021 @ 9:35 pm

    […] or 25-pin wiring. The 25-pin Rs232 known as DB-25 connects every pin while the 9-pin Rs232 known as DB-9 does not connect many of the uncommonly used connections.  The 4-pin Rs232 cables provide the […]


  2. Parallel port – NetworkUstad
    September 14, 2021 @ 9:36 pm

    […] simultaneously over multiple wires. Theoretically parallel port is eight-time faster than a serial port. The serial port sends one bit while at the same time parallel ports send eight […]


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