Business Class Services

What is typically required when working on a voice installation with a private branch exchange (PBX) system?

A telephone technician or onsite support that is provided by the customer.

For standard server racks, what is 1U equivalent to vertically?

1.75 inches.

What is a result of 5 GHz wavelengths being shorter than 2.4 GHz wavelengths?

5 GHz waves have a lower indoor range then 2.4 GHz waves.

Which unshielded twisted-pair (UTP) category (CAT) supports data rates up to 10 gigabits per second (Gbps) ?

CAT-6, CAT-6A, and CAT-7.

Which type of unshielded twisted-pair (UTP) cable does not easily catch fire and is designed to smoke very little so that toxic fumes are not circulated through a building?

CMP - Plenum-rated cable.

According to the National Electric Code (NEC) article 800-179, which type of cable marking shows that a cable is riser-rated?

CMR.

Which part of the DVIS takes an incoming signal and filters out a range of frequencies?

Channel elimination filter

What is the first thing to look for when telephones within the business experience an issue where there is no dial tone and the embedded multimedia terminal adapter (EMTA) is powered up?

Check dial tone directly from the EMTA using a telephone test set.

Which two layers of the Open Systems Interconnection (OSI) reference model are combined in the transmission control protocol/Internet protocol (TCP/IP) model Network Access Layer?

Data Link Layer and Physical Layer.

Which step in the six-step troubleshooting process uses the information that was gathered to identify the cause of the problem and find the most likely solution?

Diagnose the symptoms.

Which Wi-Fi transmitting device has the highest likelihood to support dynamic frequency selection (DFS) channels?

Enterprise-grade access points (AP)

What are the three types of service level agreements (SLA)?

Customer based, service based, and multi-level.

When troubleshooting a problem within a commercial property, what group of people should you leverage for help?

Customer on-site Information Technology (IT) staff.

What special band, in the 5 GHz band, is located on Channel 165?

Industrial, Scientific, and Medical (ISM) band

When setting up a commercial TV, which feature allows you to change the access code to enter the installer menu?

Installer sequence.

Which protocol has four numeric fields, each 8 binary bits long, called "octets"?

Internet protocol version 4 (IPv4).

What is the best Infrared (IR) sensor for a set-back box (SBB) due to their relatively low cost and their ability to be hidden from view?

Prism sensor.

Which of the following is a unique address that is physically assigned to devices such as a modem or network interface card (NIC)?

Media access control (MAC) address.

According to the ANSI/TIA/EIA-606 color coding guidelines, which color represents the telephone demarcation point in a commercial building?

Orange.

Which survey has information about cabling in walls, splitter locations, and closet locations?

Pre-installation survey.

Which of the following data services does a business use because it works best for dedicated services, such as hosting a website or Internet server, email, and file transfer protocol (FTP)?

Static Internet protocol (IP) addressing.

When troubleshooting a commercial property, what is the main reason for removing a reverse output pad from a line amplifier?

To mitigate unwanted noise or ingress leaking back into the hybrid fiber/coax (HFC) plant.

What can be done when access points (AP) share the same channel and are contending for airtime, thus slowing down the network?

Turn down transmit power

When setting personal expectations before arriving at a job, which part of the UPDATE method helps you keep in mind that what the customer expects may differ from your expectations, so it is best to try to determine their expectations in advance?

Understanding the customer's expectations.

When troubleshooting a missing channel issue on a media distribution gateway for a commercial property, what should be done?

Verify that an auto program has been run or that the correct commercial TV configuration file in use.

If an issue is found with a single set-back box (SBB) or digital terminal adapter (DTA) during the verification process, what is the first thing you should determine?

Whether the issue is physical in nature such as no power, an unplugged High-Definition Multimedia Interface (HDMI), or on a switched outlet.

What is the first thing a customer sees and, therefore, becomes the basis of their first impression of you?

Your appearance.

What determines the overall quality of a stable Internet service?

Zero percent packet loss and a stable ping time.

What information can be derived from a system map?

Amplifiers and nodes with their levels and locations.

What unique business grounding point, a solid copper plate with holes for mounting and grounding equipment, can be found in utility and networking closets?

Buss bar.

What telephone wiring condition is characterized by one or more telephones not working because one or both conductors have been cut?

Open condition.

When porting telephone numbers, what information should you confirm with the customer?

The number of telephone lines being installed and their associated telephone numbers.

What is the primary purpose of a 66-block?

To distribute up to 50 unique telephone numbers within a business.

What is the minimum accepted input signal strength per digital channel on a media distribution gateway?

+5 to +10 decibel millivolts (dBmV).

How many non-overlapping, dynamic frequency selection (DFS) supporting, 20 MHz wide channels reside in the 5 GHz band?

24

What are the life cycle stages of a small-to-medium business (SMB)?

Establishment, Growth, Expansion, Maturity, Decline.

Static Internet protocol (IP) address settings are manually configured using the IP address, the Preferred DNS server, the Alternate DNS server, and the Subnet mask settings. Which setting is missing from the list?

Default gateway.

What is a good practice to use when installing an access point (AP) in a hospital room or dormitory where people sleep?

Disable the light-emitting diodes (LED) on the AP and only temporarily enable them when troubleshooting

What should you always do when working with old telephone wiring?

Inspect, clean, test, and label every part of the active telephone infrastructure within the business.

What is the best way to gather information to create a clear and concise problem statement?

Leverage multiple sources for information by talking to the customer's office staff, maintenance staff, and those impacted by the problem

Which small, network is private to the organization, sharing a common communications line linking together devices such as computers, printers, and other peripherals?

Local area network (LAN).

What does electrical interference from electrical wiring or electric motors cause on telephone wiring?

Noise on the line.

Which command line entry is used for testing latency, packet loss, and the general health of the modem?

Ping

Which media distribution gateway is used where legacy analog TVs are in place for reliable programming without a set-top box (STB)?

Quadrature amplitude modulation (QAM) to analog (Q2A)

What consideration could one make if a deployed network has good 2.4 GHz coverage with lackluster 5 GHz coverage?

Reduce transmit power in 2.4 GHz

What credential server do Wired Protected Access (WPA) or WPA2 encrypted access points (AP) use to compare credentials prior to allowing a user to authenticate to a network?

Remote Authentication Dial-In Service (RADIUS) server

Prior to arriving at a customer site for a business class installation, who should you contact to get more information out about the customer?

Sales representative.

What should be communicated to the customer prior to taking their services offline?

Tell them when you will begin your work and inform them after you are finished.

Why is it important that a channel plan ensures no two adjacent access points are on the same channel?

To avoid co-channel interference

Which two bands, in the 5GHz band, are home to the dynamic frequency selection (DFS) channels?

Unlicensed National Information Infrastructure (UNII)-2 and UNII-2e bands