Computer Networking
You want to create a standard access list that denies the subnet of the following host: 172.16.144.17/21. Which of the following would you start your list with?

access-list 10 deny 172.16.136.0 0.0.15.255
access-list 10 deny 172.16.64.0 0.0.31.255
access-list 10 deny 172.16.144.0 0.0.7.255
access-list 10 deny 172.16.48.0 255.255.240.0

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Computer Networking
HDLC (High-level Data Link Control) is

a method of determining which device has access to the transmission medium at any time
None of these
network access standard for connecting stations to a circuit-switched network
a very common bit-oriented data link protocol issued by ISO.
a method access control technique for multiple-access transmission media

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Computer Networking
Which of the following summation operations is performed on the bits to check an error-detecting code?

Coder-decoder
Attenuation
Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions
Checksum
Codec

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