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Computer Networking

Computer Networking
How many OSI layers are covered in the X.25 standard?

None of these
seven
two
six
three

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Computer Networking
You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports four subnets and a maximum number of hosts?

255.255.255.224
255.255.255.252
255.255.255.240
255.255.255.192
255.255.255.248

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Computer Networking
A central computer surrounded by one or more satellite computers is called a

ring network
All of these
None of these
bus network
star network

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Computer Networking
Examples are packet switching using frame relay, and cell switching using ATM technologies. Select the best fit for answer:

Inter organizational networks
None of these
Bandwidth alternatives
Switching alternating
Extranets

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Computer Networking
What information is displayed by the show hosts command?1. Temporary DNS entries2. The names of the routers created using the hostname command3. The IP addresses of workstations allowed to access the router4. Permanent name-to-address mappings created using the ip host command5. The length of time a host has been connected to the router via Telnet

1 and 4
All of these
3, 4, and 5
1, 2 and 3

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Computer Networking
The synchronous modems are more costly than the asynchronous modems because

they transmit the data with stop and start bits.
they operate with a larger bandwidth
None of these
they produce large volume of data
they contain clock recovery circuits

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