Comptia Net+ - Module 2

from textbook and slides

What is the industry standard height and width for racks?

height: 42U/RU (rack units) ~ 6ft or 18-22U for half-racks

width: 19 inches (23 inches also available)

What is the cabling standard for patch cables?

3-25 ft in length with connector at both ends

What is the cabling standard for horizontal cabling?

Max 100 m and connects workstations to closest data room and to switches that are in the room

What are the 3 cabling types for horizontal cabling?

• UTP (unshielded twisted pair) - copper based with plastic sheath

• STP (shielded twisted pair) - like utp but has metallic foil around each pair + plastic sheath

• fiber optic - two types (SMF [single mode fiber] or MMF [multimode fiber]) contains 1 or more glass/plastic fibers in the core

What is backbone (aka vertical) cabling?

cables or wireless links that provide connection between the entrance facility and MDF AND the MDF and IDFs

At what point does the ISP hand over responsibility to the customer?

a) MDF

b) patch panel

c) demarc

d) IDF

c) demarc

According to structured cabling standards, there must be at least one __ on each floor.

a) IDF

b) MDF

c) demarc

d) work area

a) IDF

Which of the following causes physical layer failures?

a) SCADA

b) PVC

c) STP

d) EMI

d) EMI

What is SCADA (supervisory control and data acquisition)?

industrial controls systems (ex HVAC sensors)

Which network diagram shows a logical topology?

a) rack diagram

b) network map

c) floor plan

d) wiring diagram

b) network map

In which life cycle phase is an old device removed from the network?

a) evaluation

b) documentation and maintenance

c) implementation

d) requirement analysis

c) implementation

When an internet connection goes down, what business document defines a customer’s options for paying a reduced rate?

a) MOU

b) SOW

c) RFP

d) SLA

d) SLA

Which change is designed to close a security vulnerability without affecting other component of an application?

a) patch

b) rollback

c) upgrade

d) installation

a) patch

Which change management principle must you apply to all changes regardless of scope or impact?

a) acquire review board approval

b) apply the change as soon as possible

c) submit a change request document

d) document the change

d) document the change

A technician from your ISP has arrived to help you troubleshoot a weak WAN connection. To what location do you take them?

a) IDF

b) work area

c) CEO’s office

d)EF

Answers vary but not c

A transceiver was recently damaged by a lightning strike during a storm. How might you decide whether the ISP is responsible for replacing this device, or whether your company must foot the bill?

a) look at whether the device is located on the ISP’s side of demarc

b) look at the manufacturer info on the device’s lable

c) look at purchase records for the device to determine when it was acquired

d) look at what kinds of cables are connected to this device

a) look at whether the device is located on the ISP’s side of demarc

Which of the following devices are you likely to find in the MDF? Choose all that apply.

a) routers

b) switches

c) network printer

d) KVM switch

a) routers, b) switches & d) KVM switch

Which device converts signals from a campus’s analog phone equipment into IP data that can travel over Internet?

a) legacy PBX

b) VoIP phone

c) voice gateway

d) dedicated telephone switch

c) voice gateway

If you’re shopping for a rack switch, what component on the switch tells you it can be

mounted to a rack?

a) AC adapter

b) rack ears

c) padded feet

d) large fans

b) rack ears

You need to connect a new network printer to a nearby wall jack. What kind of cable should you use?

a) fiber-optic cable

b) patch cable

c) backbone cable

d) plenum-rated cable

b) patch cable

You’ve decided to run an Nmap scan on your network. Which apps could you open to perform this task? Choose all that apply.

a) zenmap

b) microsoft Edge

c) command Prompt

d) powerShell

a) zenmap, c) command Prompt & d) powerShell

What type of diagram shows a graphical representation of a network’s wired infrastructure?

a) rack diagram

b) wiring diagram

c) network map

d) network topology

b) wiring diagram

Which of these is considered a secure place to store a list of documented network passwords?

a) the CEO’s smartphone

b) a sticky note under the keyboard

c) a password manager

d) the MDF

c) a password manager

What is the first step of inventory management?

a) interview users.

b) identify network requirements.

c) list an administrative account’s username and password for each device on a network.

d) list all components on the network.

d) list all components on the network.

Give three examples of networked devices that are not computers.

answers vary; security cameras, SCADA sensors, electric utilities, lighting

Why is it important to use a structured cabling standard when installing and managing cabling systems?

best way to install types of media to maximize performance and minimize upkeep

Why is it important to use plenum-rated cabling in the area above the ceiling tile?

safer than regular coated PVC cabling, less smoke when burned and smoke is less toxic

What is the unit of measurement that defines the space available in a rack? How tall are standard racks?

rack units; 42U or RU ~6 ft

Why is it important to minimize cable clutter in a rack?

helps prevent airflow blockages and heat buildup

What are some elements that are typically included in network diagrams?

answers vary but include

physical layout, logical topology, IP address reserves, names of major network devices, and types of transmission media

How can you go about gathering the information needed to assemble a thorough operations manual?

answers include

visits to data rooms, an examination of servers and desktops, a review of receipts for software and hardware purchases, and the use of a protocol analyzer or network management software package.

What command invokes Nmap at a command line?

nmap

For what time period should you schedule a network change?

off hours or duiring regularly scheduled maintenance windows

In a large organization, how do you typically request permission to perform a network change?

submit change request document

What are 5 points to about cable management?

• only use certified installers

• don’t exceed bend radius

• avoid EMI

• use patch panels

• document everything (data jack, port, patch panel, connectors) with colors

What are network diagrams?

graphical representations of a network’s devices and connections

What is network mapping?

the process of discovering and identifying devices on a network with tools (nmap & zenmap)

What business document request vendors to submit a proposal for products or services?

a) RFP

b) MOU

c) SOW

d) SLA

a) RFP (request for proposal)

What document has the the intentions of each party on paper to enter a binding agreement?

a) RFP

b) SOW

c) MOU

d) SLA

c) MOU (memorandum of understanding)

What document has the work that must be completed for a project on paper?

a) RFP

b) MOU

c) SOW

d) SLA

c) SOW (statement of work)