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Computer Networking

Computer Networking
Which of the following provides a storage mechanism for incoming mail but does not allow a user to download messages selectively?

POP3
SMTP
2
IMAP
DHCP

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Computer Networking
A default Frame Relay WAN is classified as what type of physical network?

Non-broadcast multi-access
Broadcast multi-access
Point-to-point
Non-broadcast multipoint

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Computer Networking
With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?

Non-broadcast multi-access
IS-IS
Point-to-point
Backbone area 0
Broadcast multi-access

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Computer Networking
Error detection at the data link level is achieved by

Hamming Code
Cyclic Redundancy Code
Bit Stuffing
Equalization

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

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

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

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