CMIT 265 PRACTICE EXAM QUESTIONS WITH
VERIFIED ACCURATE ANSWERS
What topology connects each network device to a central hub? - Answers - Star
Topology
What is a short circuit? - Answers - When electrical signals take a path other than the
intended path. In twisted pair wiring, a short means that a signal sent on one wire might
arrive on a different wire. CAUSES: worn wire jackets, crushed wires that touch, and
pierced wires that touch metal.
What is CROSSTALK? - Answers - Interference that is caused by signals within twisted
pairs of wires.
What is attenuation? - Answers - The loss of signal strencth from one end of a cable to
the other caused by distance.
What is a split pair condition? - Answers - A condition where a single wire in two
different pairs is reversed at both ends. EX: instead of matching the green and
green/white wires in pins 1 and 2, you swap the solid green wire with the solid brown
wire.
What security improvements are added by SNMP v3? - Answers - 1) Authentication for
agents and managers
2) Encryption of SNMP information
3) Message integrity to ensure that data is not altered in transit
Must Class B addresses on all network nodes have the same network address? -
Answers - Yes. EX: Class B address is 130.15.0.0 the other addresses must include
130.15
Can IPsec be deployed in the presence of firewalls, routers, and switches? - Answers -
Yes BUT in firewalls, special access ports will need to be configured to allow IPsec
traffic to pass.
What networking device or service prevents the use of IPsec in most cases? - Answers
- NAT
What is a PACKET SNIFFER? - Answers - Special software that captures (records)
frames that are transmitted on a network.
How is a packet sniffer used? - Answers - -To identify the types of traffic on a network
-To view the exchange of packets between communicating devices
-To analyze packets sent to and from specific devices
, -View packet contents
What is a port scanner used for? - Answers - To identify protocol ports that are opened
in a firewall or active on a device.
What does a port scanner check? - Answers - It checksindividual systems
What is a throughput tester? - Answers - It measures the amount of data that can be
transferred through a network or processed by a device.
What is an Intrusion Detection System (IDS)? - Answers - A special network device that
can dtect attacks and suspicious activity. Passive IDS monitors, logs, and detects
security breaches but takes not action to stop attack. Ative IDS (Or Itrusion Protection
System IPS) performs funtions of an IDS and also reacts when security breaches occur.
What is a TDR? - Answers - Time Domain Reflector: A special device that sends
electrical pulses on a wire IOT discover information about the cable. It is used to:
- Estimate 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? - Answers - Optical Time Domain Reflector
What is the optimal temperature and humidity for a server room? - Answers - 70-74
degrees and 40-60 percent humidity.
What is a line conditioner used for? - Answers - It improves the quality of the power by:
- Removing noise caused by EMI and RFI
- Providing small amounts of additional power to defend against power dips and sags
- Prevents damage from spikes and surges.
How can you integrate phone calls emails and IM into a single platform? - Answers -
Use Unified Communication:
UC integrates multiple communications into single system EX: Voice calls, audio
conferencing, Video conferencing, desktop sharing, IM, Texting, Voice mail, ect
What is Creeping Privileges? - Answers - 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? - Answers - 2.4GHz frequency
band.
Describe how a switch functions - Answers - It connects multiple cable segments or
devices and forwards frames to appropriate segments.
VERIFIED ACCURATE ANSWERS
What topology connects each network device to a central hub? - Answers - Star
Topology
What is a short circuit? - Answers - When electrical signals take a path other than the
intended path. In twisted pair wiring, a short means that a signal sent on one wire might
arrive on a different wire. CAUSES: worn wire jackets, crushed wires that touch, and
pierced wires that touch metal.
What is CROSSTALK? - Answers - Interference that is caused by signals within twisted
pairs of wires.
What is attenuation? - Answers - The loss of signal strencth from one end of a cable to
the other caused by distance.
What is a split pair condition? - Answers - A condition where a single wire in two
different pairs is reversed at both ends. EX: instead of matching the green and
green/white wires in pins 1 and 2, you swap the solid green wire with the solid brown
wire.
What security improvements are added by SNMP v3? - Answers - 1) Authentication for
agents and managers
2) Encryption of SNMP information
3) Message integrity to ensure that data is not altered in transit
Must Class B addresses on all network nodes have the same network address? -
Answers - Yes. EX: Class B address is 130.15.0.0 the other addresses must include
130.15
Can IPsec be deployed in the presence of firewalls, routers, and switches? - Answers -
Yes BUT in firewalls, special access ports will need to be configured to allow IPsec
traffic to pass.
What networking device or service prevents the use of IPsec in most cases? - Answers
- NAT
What is a PACKET SNIFFER? - Answers - Special software that captures (records)
frames that are transmitted on a network.
How is a packet sniffer used? - Answers - -To identify the types of traffic on a network
-To view the exchange of packets between communicating devices
-To analyze packets sent to and from specific devices
, -View packet contents
What is a port scanner used for? - Answers - To identify protocol ports that are opened
in a firewall or active on a device.
What does a port scanner check? - Answers - It checksindividual systems
What is a throughput tester? - Answers - It measures the amount of data that can be
transferred through a network or processed by a device.
What is an Intrusion Detection System (IDS)? - Answers - A special network device that
can dtect attacks and suspicious activity. Passive IDS monitors, logs, and detects
security breaches but takes not action to stop attack. Ative IDS (Or Itrusion Protection
System IPS) performs funtions of an IDS and also reacts when security breaches occur.
What is a TDR? - Answers - Time Domain Reflector: A special device that sends
electrical pulses on a wire IOT discover information about the cable. It is used to:
- Estimate 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? - Answers - Optical Time Domain Reflector
What is the optimal temperature and humidity for a server room? - Answers - 70-74
degrees and 40-60 percent humidity.
What is a line conditioner used for? - Answers - It improves the quality of the power by:
- Removing noise caused by EMI and RFI
- Providing small amounts of additional power to defend against power dips and sags
- Prevents damage from spikes and surges.
How can you integrate phone calls emails and IM into a single platform? - Answers -
Use Unified Communication:
UC integrates multiple communications into single system EX: Voice calls, audio
conferencing, Video conferencing, desktop sharing, IM, Texting, Voice mail, ect
What is Creeping Privileges? - Answers - 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? - Answers - 2.4GHz frequency
band.
Describe how a switch functions - Answers - It connects multiple cable segments or
devices and forwards frames to appropriate segments.
