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CMIT 265 Practice Exam Questions And 100% Correct Answers
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CMIT 265 Practice Exam Questions And100% Correct Answers
What networking device or service prevents the use of IPsec in most cases?
NAT
What is a PACKET SNIFFER?
Special software that captures (records) frames that are transmitted on a network.
How would you use a packet sniffer?
- To determine the types of traffic traversing a network
- To see the packet exchange between communicating devices
- To examine packets being sent to and from specific devices
See the contents of packets
What is the function of a port scanner?
To identify what protocol ports are open in a firewall or listening on a host.
What does a port scanner check?
It checks individual systems
Throughput Tester
It measures how much data can go through a network or processed by a device.
What is Intrusion Detection System?
,Specialty network device able to detect attacks and suspicious activity. Passive IDS
monitors, logs, and detects security breaches but takes no action to stop attack. Active
IDS (Or Intrusion Protection System IPS) performs functions of an IDS and also reacts
when security breaches occur.
What is a TDR?
Time Domain Reflector: A special device that sends electrical pulses on a wire IOT
discover information about the cable. It is used to:
щосьEstimate the length of a wire
Measure the cable impedance
Identify the locations of splices and connectors on the wire
Identify shorts, open circuits, and location of the fault.
What is an OTDR?
Optical Time Domain Reflector
What is the optimal temperature and humidity for a server room?
70-74 degrees and 40-60 percent humidity.
What is the purpose of a line conditioner?
It adds to the quality of the power by:
Removing the noise created by EMI and RFI
Adding small amounts of replacement power to battle power dips and sags
Protection from damage created by spikes and surges.
How would you consolidate all phone calls, emails and IM on one platform?
Use Unified Communication:
UC consolidates multiple communications into single system EX: Voice calls, audio
conferencing, Video conferencing, desktop sharing, IM, Texting, Voice mail, ect
What is Creeping Privileges?
Its an example of privilege escalation. When users change job positions and are granted
new privileges while previous privileges are not removed.
, What frequencies do IEEE 802.11b and 802.11g use?
2.4GHz frequency band.
Describe how a switch functions
It connects several cable segments or devices and forwards frames toward the
appropriate segments.
What is Promiscuous mode?
AKA P-mode. In P-mode the NIC processes every frame it sees.
What is the name of the topology that connects each network device to a central hub?
Star Topology
What is a short circuit?
When electrical signals take a path other than what was intended. In twisted pair wiring,
a short means that a signal sent on one wire may arrive on a different wire. CAUSES:
worn wire jackets, crushed wires that touch and pierced wires that touch metal.
What is CROSSTALK?
Interference caused by signals within twisted pairs of wires.
What is attenuation?
The loss of signal strencth from one end of a cable to the other caused by distance.
What is a split pair condition?
A single wire in two different pairs is reversed at both ends. EX: instead of connecting
the green and green/white wires in pins 1 and 2 you would connect the solid green wire
to the solid brown wire.
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