Computer Networking
Which of the following are valid ways to refer only to host 172.16.30.55 in an IP access list? 1. 172.16.30.55 0.0.0.255 2. 172.16.30.55 0.0.0.0 3. any 172.16.30.55 4. host 172.16.30.55 5. 0.0.0.0 172.16.30.55 6. ip any 172.16.30.55

1 and 4
2 and 4
3 and 5
1, 4 and 6

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Computer Networking
The physical layer, in reference to the OSI model, defines

None of these
data link procedures that provide for the exchange of data via frames that can be sent and received
the interface between the X.25 network and packet mode device
the virtual circuit interface to packet-switched service
All of these

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