Computer Networking
What command will permit SMTP mail to only host 1.1.1.1?

access-list 110 permit ip smtp host 1.1.1.1
access-list 10 permit tcp any host 1.1.1.1 eq smtp
access-list 110 permit tcp any host 1.1.1.1 eq smtp
access-list 10 permit smtp host 1.1.1.1

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Computer Networking
Which of the following technique is used for encapsulation?

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
a technique used in best-effort delivery systems to avoid endlessly looping packets.
None of these
All of these
a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.

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Computer Networking
The data-link layer, in reference to the OSI model, specifies

None of these
All 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

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