Computer Networking
Demodulation is the process of

converting digital signals to analog signals
dividing the high-speed signals into frequency bands
combining many low speed channels into one high speed channel
None of these
converting analog signals to digital signals

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Computer Networking
If you wanted to deny FTP access from network 200.200.10.0 to network 200.199.11.0 but allow everything else, which of the following command strings is valid?

access-list 110 deny 200.200.10.0 to network 200.199.11.0 eq ftpaccess-list 111 permit ip any 0.0.0.0 255.255.255.255
access-list 1 deny ftp 200.200.10.0 200.199.11.0 any any
access-list 198 deny tcp 200.200.10.0 0.0.0.255 200.199.11.0 0.0.0.255 eq ftpaccess-list 198 permit ip any 0.0.0.0 255.255.255.255
access-list 100 deny tcp 200.200.10.0 0.0.0.255 200.199.11.0 0.0.0.255 eq ftp

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Computer Networking
Which of the following characteristic(s) is/are suited to the PSS applications?

bursty traffic and low communications intensity
Multiple remote host or applications accessed by a single local access circuit terminal and circuit
None of these
All of these
widely dispersed terminals and access to international packets switched services

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