Computer Networking
Many data communication networks have been established which provide a wealth of on-demand information services to people at home. What is the name of the system which provides an interactive, graphics-rich service that permits user to select what they want?

None of these
Fax system
Videotex system
Microwave system
Teletex system

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Computer Networking
Which of the following statements is correct for the use of packet switching?

None of these
by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied
the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individ
All of these

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Computer Networking
If you wanted to deny all Telnet connections to only network 192.168.10.0, which command could you use?

access-list 100 deny tcp 192.168.10.0 255.255.255.0 eq telnet
access-list 100 deny 192.168.10.0 0.0.0.255 any eq 23
access-list 100 deny tcp 192.168.10.0 0.255.255.255 eq telnet
access-list 100 deny tcp any 192.168.10.0 0.0.0.255 eq 23

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Computer Networking
The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size? Choose the best answer

The network becomes more efficient
The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500
An additional token is added for every 1,000 nodes
The network becomes less efficient
After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device

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