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Computer Networking

Computer Networking
How many non-overlapping channels are available with 802.11a?

3
12
23
40

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Computer Networking
Which of the following device is used with an X.25 network to provide service to asynchronous terminals

gateway
repeater
bridges
None of these
Packet assembler/disassemble

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Computer Networking
You are working with a network that has the network ID 192.168.10.0 and require nine subsets for your company and the maximum number of hosts. What subnet mask should you use?

255.255.255.248
255.255.255.224
255.255.255.240
255.255.255.252
255.255.255.192

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Computer Networking
Which of the following is the decimal and hexadecimal equivalents of the binary number 10011101?

159, 0x9F
157, 0x9D
185, 0xB9
155, 0x9B

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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?

Videotex system
None of these
Fax system
Microwave system
Teletex system

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Computer Networking
Which of the following modes are valid when a switch port is used as a VLAN trunk?1. Blocking2. Dynamic auto3. Dynamic desirable4. Nonegotiate5. Access6. Learning

1, 2 and 6
2, 3 and 4
2, 4, and 5
4, 5 and 6

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