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Computer Networking

Computer Networking
Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?

HDLC
IPSec
Cable
VPN
xDSL

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Computer Networking
Which of the following services use UDP?1. DHCP2. SMTP3. SNMP4. FTP5. HTTP6. TFTP

All of these
1, 2 and 4
1, 3 and 6
2 and 4

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Computer Networking
You want to run the new 802.1w on your switches. Which of the following would enable this protocol?

Switch(config)# spanning-tree mode 802.1w
Switch# spanning-tree mode rapid-pvst
Switch(config)# spanning-tree mode rapid-pvst
Switch# spanning-tree mode 802.1w

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Computer Networking
Most data communications involving telegraph lines use:

wideband channels
None of these
simplex lines
narrowband channels
dialed service

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Computer Networking
The network address of 172.16.0.0/19 provides how many subnets and hosts?

8 subnets, 2,046 hosts each
8 subnets, 8,190 hosts each
7 subnets, 30 hosts each
7 subnets, 2,046 hosts each

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Computer Networking
A characteristic of a multiprogramming system is:

multiple CPUs
simultaneous execution of program instructions from two applications
All listed here
None of these
concurrent processing of two or more programs

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