Computer Networking
The CCITT Recommendation X.25 specifies three layers of communications:

None of these
datalink, network and transport
application, presentation and session
physical datalink and network
Session, transport and network

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Computer Networking
You need to create an access list that will prevent hosts in the network range of 192.168.160.0 to 192.168.191.0. Which of the following lists will you use?

access-list 10 deny 192.168.0.0 0.0.31.255
access-list 10 deny 192.168.160.0 255.255.224.0
access-list 10 deny 192.168.160.0 0.0.31.255
access-list 10 deny 192.168.160.0 0.0.191.255

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Computer Networking
ARP (Address Resolution Protocol) is

a TCP/IP high level protocol for transferring files from one machine to another
None of these
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol used to monitor computers
a protocol that handles error and control messages

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Computer Networking
What is a stub network?

A network with more than one exit and entry point.
A network that has only one entry and exit point.
A network with only one entry and no exit point.
A network with more than one exit point.

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