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Computer Networking

Computer Networking
What is the port number for POP3?

90
110
80
49

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Computer Networking
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

3, 3, 2, none
3, 2, 1, none
All of these
3, 3, 1, 7
3, 2, 1, 7

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Computer Networking
A communication network which is used by large organizations over regional, national or global area is called

MAN
LAN
WAN
None of these
Intranet

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Computer Networking
Working of the WAN generally involves

telephone lines
microwaves
All of these
None of these
satellites

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Computer Networking
A data communications system has:

5 components
4 components
7 components
6 components

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Computer Networking
Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:

Protocol
Open Systems
TCP/IP
Internetwork processor

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