Computer Networking
Which of the following is true when describing a global unicast address?

These are like private addresses in IPv4 in that they are not meant to be routed.
Packets addressed to a unicast address are delivered to a single interface.
These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

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Computer Networking
X.21 is

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

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Computer Networking
You want to create a standard access list that denies the subnet of the following host: 172.16.50.172/20. Which of the following would you start your list with?

access-list 10 deny 172.16.48.0 255.255.240.0
access-list 10 deny 172.16.48.0 0.0.15.255
access-list 10 deny 172.16.64.0 0.0.31.255
access-list 10 deny 172.16.0.0 0.0.255.255

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